NOAA SWPC Alerts, Watches och Varningar

Den amerikanska rymdvädertjänsten, National Oceanic and Atmosperic Administration Space Weather Prediction Center (NOAA SWPC) är den organisation som ger omvärlden alerts, watches och varningar. Här nere hittar du som senaste rymdväder alerts, watches och varningar av NOAA SWPC.

söndag, 24 maj 2026

12:11 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1489
Issue Time: 2026 May 24 1211 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 May 24 0850 UTC
Estimate Velocity: 579 km/s
Comment:

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3694
Issue Time: 2026 May 24 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3693
Begin Time: 2026-05-16 17:40
Yesterday Maximum 2MeV Flux: 3762 pfu
Continued 2026-05-24 04:59 by Forecaster User

Continued 2026-05-24 04:59 by Forecaster User

lördag, 23 maj 2026

20:00 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1488
Issue Time: 2026 May 23 2000 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 May 23 1941 UTC
Estimate Velocity: 932 km/s
Comment:

06:31 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3693
Issue Time: 2026 May 23 0631 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3692
Begin Time: 2026-05-16 17:40
Yesterday Maximum 2MeV Flux: 3762 pfu
Continued 2026-05-23 06:31 by Forecaster User

Continued 2026-05-23 06:31 by Forecaster User

fredag, 22 maj 2026

05:07 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3692
Issue Time: 2026 May 22 0507 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3691
Begin Time: 2026-05-16 17:40
Yesterday Maximum 2MeV Flux: 2842 pfu
Continued 2026-05-22 05:06 by Forecaster User

Continued 2026-05-22 05:06 by Forecaster User

torsdag, 21 maj 2026

05:09 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3691
Issue Time: 2026 May 21 0509 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3690
Begin Time: 2026-05-16 17:40
Yesterday Maximum 2MeV Flux: 1717 pfu
Continued 2026-05-21 05:07 by Forecaster User

Continued 2026-05-21 05:07 by Forecaster User

onsdag, 20 maj 2026

10:06 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3690
Issue Time: 2026 May 20 1006 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3689
Begin Time: 2026-05-16 17:40
Yesterday Maximum 2MeV Flux: 2860 pfu
Continued 2026-05-20 10:06 by Forecaster User

Continued 2026-05-20 10:06 by Forecaster User

tisdag, 19 maj 2026

23:56 UTC

Space Weather Message Code: WARK04
Serial Number: 5346
Issue Time: 2026 May 19 2356 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5345
Valid From: 2026-05-19T07:01:00
Now Valid Until: 2026-05-20 06:00
Warning Condition: Persistence
Extended 2026-05-19 23:56 by Forecaster User

Extended 2026-05-19 23:56 by Forecaster User

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

20:57 UTC

Space Weather Message Code: WARK04
Serial Number: 5345
Issue Time: 2026 May 19 2057 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5344
Valid From: 2026-05-19T07:01:00
Now Valid Until: 2026-05-19 24:00
Warning Condition: Persistence
Extended 2026-05-19 20:57 by Forecaster User

Extended 2026-05-19 20:57 by Forecaster User

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:42 UTC

Space Weather Message Code: WARK04
Serial Number: 5344
Issue Time: 2026 May 19 1642 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5343
Valid From: 2026-05-19T07:01:00
Now Valid Until: 2026-05-19 21:00
Warning Condition: Persistence
Extended 2026-05-19 16:41 by Forecaster User

Extended 2026-05-19 16:41 by Forecaster User

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

08:55 UTC

Space Weather Message Code: ALTK04
Serial Number: 2657
Issue Time: 2026 May 19 0855 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 May 19 0828 UTC
Synoptic Period: 0600-0900
Active Warning: YES
Comment:



NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

07:03 UTC

Space Weather Message Code: WARK04
Serial Number: 5343
Issue Time: 2026 May 19 0703 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 May 19 0701 UTC
Valid To: 2026 May 19 1800 UTC
Warning Conditions: Onset
Comment:



NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:14 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3689
Issue Time: 2026 May 19 0514 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026 May 16 1740 UTC
Station: GOES-19
Comment: Yesterday's max: 6667 pfu


Yesterday's max: 6667 pfu

04:56 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3689
Issue Time: 2026 May 19 0456 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3688
Begin Time: 2026-05-16 17:40
Yesterday Maximum 2MeV Flux: 6118 pfu
Continued 2026-05-19 05:00 by Forecaster User

Continued 2026-05-19 05:00 by Forecaster User

måndag, 18 maj 2026

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3688
Issue Time: 2026 May 18 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3687
Begin Time: 2026-05-16 17:40
Yesterday Maximum 2MeV Flux: 6118 pfu
Continued 2026-05-18 04:59 by Forecaster User

Continued 2026-05-18 04:59 by Forecaster User

söndag, 17 maj 2026

21:16 UTC

Space Weather Message Code: SUM10R
Serial Number: 913
Issue Time: 2026 May 17 2116 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2026 May 17 2050 UTC
Maximum Time: 2026 May 17 2051 UTC
End Time: 2026 May 17 2051 UTC
Peak Flux: 370 sfu
Duration: 1 minutes
Latest Penticton Noon Flux: 104 sfu
Comment:

16:12 UTC

Space Weather Message Code: WATA20
Serial Number: 1113
Issue Time: 2026 May 17 1612 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
May 18: G1 (Minor) May 19: G1 (Minor) May 20: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment:



NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

08:40 UTC

Space Weather Message Code: WARK04
Serial Number: 5342
Issue Time: 2026 May 17 0840 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5341
Valid From: 2026-05-13T20:26:00
Now Valid Until: 2026-05-17 21:00
Warning Condition: Persistence
Extended 2026-05-17 08:38 by Forecaster User

Extended 2026-05-17 08:38 by Forecaster User

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

08:16 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3687
Issue Time: 2026 May 17 0816 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3686
Begin Time: 2026-05-16 17:40
Yesterday Maximum 2MeV Flux: 1902 pfu
Continued 2026-05-17 08:16 by Forecaster User

Continued 2026-05-17 08:16 by Forecaster User

lördag, 16 maj 2026

21:34 UTC

Space Weather Message Code: WATA20
Serial Number: 1112
Issue Time: 2026 May 16 2134 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
May 17: G1 (Minor) May 18: G1 (Minor) May 19: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment:



NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

18:14 UTC

Space Weather Message Code: WARK05
Serial Number: 2237
Issue Time: 2026 May 16 1814 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2236
Valid From: 2026-05-15T13:05:00
Now Valid Until: 2026-05-17 09:00
Warning Condition: Persistence
Extended 2026-05-16 18:13 by WC

Extended 2026-05-16 18:13 by WC NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

18:13 UTC

Space Weather Message Code: WARK04
Serial Number: 5341
Issue Time: 2026 May 16 1813 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5340
Valid From: 2026-05-13T20:26:00
Now Valid Until: 2026-05-17 09:00
Warning Condition: Persistence
Extended 2026-05-16 18:12 by WC

Extended 2026-05-16 18:12 by WC

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

18:04 UTC

Space Weather Message Code: ALTK05
Serial Number: 2022
Issue Time: 2026 May 16 1804 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 May 16 1759 UTC
Synoptic Period: 1500-1800
Active Warning: YES
Noaa Scale: G1 - Minor
Comment:

NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:53 UTC

Space Weather Message Code: ALTEF3
Serial Number: 3686
Issue Time: 2026 May 16 1753 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026 May 16 1740 UTC
Station: GOES-19
Comment:

16:58 UTC

Space Weather Message Code: ALTTP4
Serial Number: 709
Issue Time: 2026 May 16 1658 UTC

ALERT: Type IV Radio Emission
Begin Time: 2026 May 16 1605 UTC
Comment:

16:37 UTC

Space Weather Message Code: SUM10R
Serial Number: 912
Issue Time: 2026 May 16 1637 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2026 May 16 1606 UTC
Maximum Time: 2026 May 16 1609 UTC
End Time: 2026 May 16 1610 UTC
Peak Flux: 170 sfu
Duration: 4 minutes
Latest Penticton Noon Flux: 101 sfu
Comment: COR for end date.


COR for end date.

16:31 UTC

Space Weather Message Code: SUM10R
Serial Number: 912
Issue Time: 2026 May 16 1631 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2026 May 16 1606 UTC
Maximum Time: 2026 May 16 1609 UTC
End Time: 2026 May 17 1610 UTC
Peak Flux: 170 sfu
Duration: 4 minutes
Latest Penticton Noon Flux: 101 sfu
Comment:

11:56 UTC

Space Weather Message Code: WARK04
Serial Number: 5340
Issue Time: 2026 May 16 1156 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5339
Valid From: 2026-05-13T20:26:00
Now Valid Until: 2026-05-16 23:59
Warning Condition: Persistence
Extended 2026-05-16 11:55 by Forecaster User

Extended 2026-05-16 11:55 by Forecaster User

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

08:59 UTC

Space Weather Message Code: ALTK05
Serial Number: 2021
Issue Time: 2026 May 16 0859 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 May 16 0859 UTC
Synoptic Period: 0600-0900
Active Warning: YES
Noaa Scale: G1 - Minor
Comment:

NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

08:45 UTC

Space Weather Message Code: WARK05
Serial Number: 2236
Issue Time: 2026 May 16 0845 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2235
Valid From: 2026-05-15T13:05:00
Now Valid Until: 2026-05-16 21:00
Warning Condition: Persistence
Extended 2026-05-16 08:44 by Forecaster User

Extended 2026-05-16 08:44 by Forecaster User NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:56 UTC

Space Weather Message Code: ALTK05
Serial Number: 2020
Issue Time: 2026 May 16 0556 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 May 16 0554 UTC
Synoptic Period: 0300-0600
Active Warning: YES
Noaa Scale: G1 - Minor
Comment:

NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

fredag, 15 maj 2026

23:56 UTC

Space Weather Message Code: WARK05
Serial Number: 2235
Issue Time: 2026 May 15 2356 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2234
Valid From: 2026-05-15T13:05:00
Now Valid Until: 2026-05-16 09:00
Warning Condition: Persistence
Extended 2026-05-15 23:55 by Forecaster User

Extended 2026-05-15 23:55 by Forecaster User NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

22:15 UTC

Space Weather Message Code: ALTK06
Serial Number: 717
Issue Time: 2026 May 15 2215 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 May 15 2215 UTC
Synoptic Period: 2100-2400
Active Warning: YES
Noaa Scale: G2 - Moderate
Comment:

NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

22:02 UTC

Space Weather Message Code: WARK06
Serial Number: 660
Issue Time: 2026 May 15 2202 UTC

WARNING: Geomagnetic K-index of 6 expected
Valid From: 2026 May 15 2201 UTC
Valid To: 2026 May 16 0300 UTC
Warning Conditions: Onset
Noaa Scale: G2 - Moderate
Comment:

NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

17:18 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1487
Issue Time: 2026 May 15 1718 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 May 15 1616 UTC
Estimate Velocity: 529 km/s
Comment:

16:07 UTC

Space Weather Message Code: ALTK05
Serial Number: 2019
Issue Time: 2026 May 15 1607 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 May 15 1606 UTC
Synoptic Period: 1500-1800
Active Warning: YES
Noaa Scale: G1 - Minor
Comment:

NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:50 UTC

Space Weather Message Code: WARK06
Serial Number: 659
Issue Time: 2026 May 15 1450 UTC

WARNING: Geomagnetic K-index of 6 expected
Valid From: 2026 May 15 1449 UTC
Valid To: 2026 May 15 2100 UTC
Warning Conditions: Onset
Noaa Scale: G2 - Moderate
Comment:

NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

13:45 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1486
Issue Time: 2026 May 15 1345 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 May 15 1344 UTC
Estimate Velocity: 347 km/s
Comment:

13:27 UTC

Space Weather Message Code: ALTK05
Serial Number: 2018
Issue Time: 2026 May 15 1327 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 May 15 1326 UTC
Synoptic Period: 1200-1500
Active Warning: YES
Noaa Scale: G1 - Minor
Comment:

NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

13:12 UTC

Space Weather Message Code: WARK05
Serial Number: 2234
Issue Time: 2026 May 15 1307 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 May 15 1305 UTC
Valid To: 2026 May 15 2359 UTC
Warning Conditions: Onset
Noaa Scale: G1 - Minor
Comment:

NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

13:09 UTC

Space Weather Message Code: WARK04
Serial Number: 5339
Issue Time: 2026 May 15 1309 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5337
Valid From: 2026-05-13T20:26:00
Now Valid Until: 2026-05-16 12:00
Warning Condition: Persistence
Extended 2026-05-15 13:09 by Forecaster User

Extended 2026-05-15 13:09 by Forecaster User

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

13:00 UTC

Space Weather Message Code: ALTK04
Serial Number: 2656
Issue Time: 2026 May 15 1300 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 May 15 1300 UTC
Synoptic Period: 1200-1500
Active Warning: YES
Comment:



NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

12:25 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1485
Issue Time: 2026 May 15 1225 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 May 15 1225 UTC
Estimate Velocity: 486 km/s
Comment:

11:58 UTC

Space Weather Message Code: WARK04
Serial Number: 5338
Issue Time: 2026 May 15 1158 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 May 15 1157 UTC
Valid To: 2026 May 16 0000 UTC
Warning Conditions: Onset
Comment:



NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

torsdag, 14 maj 2026

08:53 UTC

Space Weather Message Code: WATA30
Serial Number: 273
Issue Time: 2026 May 14 0853 UTC

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
May 15: G2 (Moderate) May 16: G1 (Minor) May 17: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: included the G1 watch for day3 (17 May)


included the G1 watch for day3 (17 May)

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

onsdag, 13 maj 2026

20:27 UTC

Space Weather Message Code: WARK04
Serial Number: 5337
Issue Time: 2026 May 13 2027 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 May 13 2026 UTC
Valid To: 2026 May 14 0600 UTC
Warning Conditions: Onset
Comment:



NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

09:07 UTC

Space Weather Message Code: WATA30
Serial Number: 273
Issue Time: 2026 May 13 0907 UTC

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
May 14: None (Below G1) May 15: G2 (Moderate) May 16: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment:



NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

tisdag, 12 maj 2026

13:26 UTC

Space Weather Message Code: WATA20
Serial Number: 1111
Issue Time: 2026 May 12 1326 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
May 13: None (Below G1) May 14: None (Below G1) May 15: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: Negative CH influence


Negative CH influence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

söndag, 10 maj 2026

14:14 UTC

Space Weather Message Code: SUMXM5
Serial Number: 316
Issue Time: 2026 May 10 1414 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 May 10 1319 UTC
Maximum Time: 2026 May 10 1339 UTC
End Time: 2026 May 10 1402 UTC
Xray Class: M5.7
Optical Class:
Location: N18E65
Noaa Scale: R2 - Moderate
Comment:

NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

13:55 UTC

Space Weather Message Code: SUM10R
Serial Number: 911
Issue Time: 2026 May 10 1355 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2026 May 10 1328 UTC
Maximum Time: 2026 May 10 1334 UTC
End Time: 2026 May 10 1343 UTC
Peak Flux: 550 sfu
Duration: 15 minutes
Latest Penticton Noon Flux: 122 sfu
Comment:

13:47 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1484
Issue Time: 2026 May 10 1347 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 May 10 1329 UTC
Estimate Velocity: 650 km/s
Comment:

13:38 UTC

Space Weather Message Code: ALTXMF
Serial Number: 528
Issue Time: 2026 May 10 1338 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 May 10 1335 UTC
Noaa Scale: R2 - Moderate
Comment:

NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

fredag, 8 maj 2026

17:25 UTC

Space Weather Message Code: WARK04
Serial Number: 5336
Issue Time: 2026 May 08 1725 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 May 08 1724 UTC
Valid To: 2026 May 08 2359 UTC
Warning Conditions: Onset
Comment:



NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

torsdag, 7 maj 2026

16:37 UTC

Space Weather Message Code: WARK04
Serial Number: 5335
Issue Time: 2026 May 07 1637 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 May 07 1635 UTC
Valid To: 2026 May 08 1500 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

tisdag, 5 maj 2026

02:49 UTC

Space Weather Message Code: ALTK05
Serial Number: 2016
Issue Time: 2026 May 05 0249 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 May 05 0244 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

måndag, 4 maj 2026

23:55 UTC

Space Weather Message Code: ALTK05
Serial Number: 2015
Issue Time: 2026 May 04 2355 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 May 04 2355 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

23:39 UTC

Space Weather Message Code: WARK04
Serial Number: 5334
Issue Time: 2026 May 04 2339 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5333
Valid From: 2026 May 04 1645 UTC
Now Valid Until: 2026 May 05 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

23:39 UTC

Space Weather Message Code: WARK05
Serial Number: 2232
Issue Time: 2026 May 04 2339 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2231
Valid From: 2026 May 04 1945 UTC
Now Valid Until: 2026 May 05 0900 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

23:39 UTC

Space Weather Message Code: WARK06
Serial Number: 657
Issue Time: 2026 May 04 2339 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 656
Valid From: 2026 May 04 2031 UTC
Now Valid Until: 2026 May 05 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

20:32 UTC

Space Weather Message Code: ALTK06
Serial Number: 715
Issue Time: 2026 May 04 2032 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 May 04 2032 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

20:31 UTC

Space Weather Message Code: WARK06
Serial Number: 656
Issue Time: 2026 May 04 2031 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026 May 04 2031 UTC
Valid To: 2026 May 05 0000 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

19:51 UTC

Space Weather Message Code: ALTK05
Serial Number: 2014
Issue Time: 2026 May 04 1951 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 May 04 1951 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

19:50 UTC

Space Weather Message Code: WARK05
Serial Number: 2231
Issue Time: 2026 May 04 1950 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 May 04 1945 UTC
Valid To: 2026 May 05 0000 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

16:49 UTC

Space Weather Message Code: ALTK04
Serial Number: 2654
Issue Time: 2026 May 04 1649 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 May 04 1647 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

16:49 UTC

Space Weather Message Code: WARK04
Serial Number: 5333
Issue Time: 2026 May 04 1649 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 May 04 1645 UTC
Valid To: 2026 May 05 0300 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

lördag, 2 maj 2026

11:11 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1482
Issue Time: 2026 May 02 1111 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 May 02 1051 UTC
Estimated Velocity: 641 km/s

Comment: Likely associated with C-class flare acitivity originating from AR 4420 on the west limb.



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

fredag, 1 maj 2026

15:50 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1481
Issue Time: 2026 May 01 1550 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 May 01 1535 UTC
Estimated Velocity: 593 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

torsdag, 30 april 2026

23:59 UTC

Space Weather Message Code: ALTK05
Serial Number: 2013
Issue Time: 2026 Apr 30 2359 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Apr 30 2359 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

23:11 UTC

Space Weather Message Code: WARK04
Serial Number: 5332
Issue Time: 2026 Apr 30 2311 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5331
Valid From: 2026 Apr 30 2005 UTC
Now Valid Until: 2026 May 01 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

23:09 UTC

Space Weather Message Code: WARK05
Serial Number: 2230
Issue Time: 2026 Apr 30 2309 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Apr 30 2309 UTC
Valid To: 2026 May 01 0900 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

20:35 UTC

Space Weather Message Code: ALTK04
Serial Number: 2653
Issue Time: 2026 Apr 30 2035 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Apr 30 2035 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

20:06 UTC

Space Weather Message Code: WARK04
Serial Number: 5331
Issue Time: 2026 Apr 30 2006 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 30 2005 UTC
Valid To: 2026 May 01 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

måndag, 27 april 2026

01:06 UTC

Space Weather Message Code: ALTTP2
Serial Number: 1480
Issue Time: 2026 Apr 27 0106 UTC

ALERT: Type II Radio Emission
Begin Time: 2026 Apr 26 2257 UTC
Estimated Velocity: 834 km/s



Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

söndag, 26 april 2026

23:33 UTC

Space Weather Message Code: WARK04
Serial Number: 5330
Issue Time: 2026 Apr 26 2333 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5329
Valid From: 2026 Apr 26 0359 UTC
Now Valid Until: 2026 Apr 27 0900 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

23:17 UTC

Space Weather Message Code: SUMXM5
Serial Number: 314
Issue Time: 2026 Apr 26 2317 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Apr 26 2251 UTC
Maximum Time: 2026 Apr 26 2257 UTC
End Time: 2026 Apr 26 2302 UTC
X-ray Class: M6.0
Location: N21W33
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

23:08 UTC

Space Weather Message Code: SUM10R
Serial Number: 909
Issue Time: 2026 Apr 26 2308 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2026 Apr 26 2256 UTC
Maximum Time: 2026 Apr 26 2257 UTC
End Time: 2026 Apr 26 2258 UTC
Duration: 1 minutes
Peak Flux: 260 sfu
Latest Penticton Noon Flux: 148 sfu



Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

23:00 UTC

Space Weather Message Code: ALTXMF
Serial Number: 526
Issue Time: 2026 Apr 26 2300 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Apr 26 2257 UTC
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.

11:47 UTC

Space Weather Message Code: WARK04
Serial Number: 5329
Issue Time: 2026 Apr 26 1147 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5328
Valid From: 2026 Apr 26 0359 UTC
Now Valid Until: 2026 Apr 26 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

06:01 UTC

Space Weather Message Code: WARK04
Serial Number: 5328
Issue Time: 2026 Apr 26 0601 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 26 0359 UTC
Valid To: 2026 Apr 26 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:59 UTC

Space Weather Message Code: ALTK04
Serial Number: 2652
Issue Time: 2026 Apr 26 0559 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Apr 26 0559 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

lördag, 25 april 2026

01:37 UTC

Space Weather Message Code: WARK04
Serial Number: 5327
Issue Time: 2026 Apr 25 0137 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 25 0137 UTC
Valid To: 2026 Apr 25 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

fredag, 24 april 2026

23:50 UTC

Space Weather Message Code: WATA20
Serial Number: 1109
Issue Time: 2026 Apr 24 2350 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Apr 25: G1 (Minor) Apr 26: G1 (Minor) Apr 27: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

18:35 UTC

Space Weather Message Code: SUMXM5
Serial Number: 313
Issue Time: 2026 Apr 24 1835 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Apr 24 1754 UTC
Maximum Time: 2026 Apr 24 1815 UTC
End Time: 2026 Apr 24 1830 UTC
X-ray Class: M6.4
Location: N19W90
NOAA Scale: R2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.