NOAA SWPC Alerts, Watches and Warnings

The National Oceanic and Atmospheric Administration Space Weather Prediction Center (NOAA SWPC) is the official space weather government agency from the United States that provides alerts, watches and warning for space weather disturbances. Below you will find the latest space weather alerts, watches and warnings issued by the NOAA SWPC.

Sunday, 18 February 2018

20:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3418
Issue Time: 2018 Feb 18 2055 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3417
Valid From: 2018 Feb 18 0124 UTC
Now Valid Until: 2018 Feb 19 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 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.

16:13 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2728
Issue Time: 2018 Feb 18 1613 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2018 Feb 18 1555 UTC
Station: GOES-15


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

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

14:49 UTC

Space Weather Message Code: WARK04
Serial Number: 3417
Issue Time: 2018 Feb 18 1449 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3416
Valid From: 2018 Feb 18 0124 UTC
Now Valid Until: 2018 Feb 18 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.

01:27 UTC

Space Weather Message Code: ALTK04
Serial Number: 2034
Issue Time: 2018 Feb 18 0127 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Feb 18 0127 UTC
Synoptic Period: 0000-0300 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.

01:24 UTC

Space Weather Message Code: WARK04
Serial Number: 3416
Issue Time: 2018 Feb 18 0124 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Feb 18 0124 UTC
Valid To: 2018 Feb 18 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.

Saturday, 17 February 2018

05:25 UTC

Space Weather Message Code: ALTK04
Serial Number: 2033
Issue Time: 2018 Feb 17 0525 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Feb 16 0523 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.

05:18 UTC

Space Weather Message Code: WARK04
Serial Number: 3415
Issue Time: 2018 Feb 17 0518 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Feb 17 0518 UTC
Valid To: 2018 Feb 17 1800 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.

Thursday, 15 February 2018

22:52 UTC

Space Weather Message Code: WARK04
Serial Number: 3414
Issue Time: 2018 Feb 15 2252 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3413
Valid From: 2018 Feb 15 1335 UTC
Now Valid Until: 2018 Feb 16 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.

17:16 UTC

Space Weather Message Code: WARK05
Serial Number: 1449
Issue Time: 2018 Feb 15 1716 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2018 Feb 15 1715 UTC
Valid To: 2018 Feb 15 2100 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.

17:15 UTC

Space Weather Message Code: ALTK04
Serial Number: 2032
Issue Time: 2018 Feb 15 1715 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Feb 15 1711 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.

17:14 UTC

Space Weather Message Code: WARK04
Serial Number: 3413
Issue Time: 2018 Feb 15 1714 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3412
Valid From: 2018 Feb 15 1335 UTC
Now Valid Until: 2018 Feb 15 2300 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.

13:34 UTC

Space Weather Message Code: WARK04
Serial Number: 3412
Issue Time: 2018 Feb 15 1334 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Feb 15 1335 UTC
Valid To: 2018 Feb 15 1800 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.

Tuesday, 13 February 2018

21:05 UTC

Space Weather Message Code: WATA20
Serial Number: 817
Issue Time: 2018 Feb 13 2105 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Feb 14: None (Below G1) Feb 15: G1 (Minor) Feb 16: G1 (Minor)

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.

Monday, 12 February 2018

20:50 UTC

Space Weather Message Code: WATA20
Serial Number: 816
Issue Time: 2018 Feb 12 2050 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Feb 13: None (Below G1) Feb 14: None (Below G1) Feb 15: G1 (Minor)

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.

Friday, 26 January 2018

01:51 UTC

Space Weather Message Code: WARK04
Serial Number: 3411
Issue Time: 2018 Jan 26 0151 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jan 26 0150 UTC
Valid To: 2018 Jan 26 0900 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.

Thursday, 25 January 2018

02:15 UTC

Space Weather Message Code: ALTK04
Serial Number: 2031
Issue Time: 2018 Jan 25 0215 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Jan 24 2359 UTC
Synoptic Period: 2100-2400 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.

Wednesday, 24 January 2018

22:04 UTC

Space Weather Message Code: WARK04
Serial Number: 3410
Issue Time: 2018 Jan 24 2204 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jan 24 2205 UTC
Valid To: 2018 Jan 25 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.

Tuesday, 23 January 2018

18:47 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2727
Issue Time: 2018 Jan 23 1847 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2018 Jan 23 1830 UTC
Station: GOES15


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

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Monday, 22 January 2018

20:02 UTC

Space Weather Message Code: WARK04
Serial Number: 3409
Issue Time: 2018 Jan 22 2002 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jan 22 2005 UTC
Valid To: 2018 Jan 23 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.

Sunday, 21 January 2018

23:51 UTC

Space Weather Message Code: WARK04
Serial Number: 3408
Issue Time: 2018 Jan 21 2351 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3407
Valid From: 2018 Jan 21 1335 UTC
Now Valid Until: 2018 Jan 22 0900 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.

13:35 UTC

Space Weather Message Code: WARK04
Serial Number: 3407
Issue Time: 2018 Jan 21 1335 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jan 21 1335 UTC
Valid To: 2018 Jan 21 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.

Saturday, 20 January 2018

05:29 UTC

Space Weather Message Code: WARK04
Serial Number: 3406
Issue Time: 2018 Jan 20 0529 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jan 20 0530 UTC
Valid To: 2018 Jan 20 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.

Current data suggest that it is not possible to see aurora now at middle latitudes
The solar wind speed is currently moderately high (593.7 km/sec.)

Latest news

Today's space weather

Auroral activity Minor Severe
High latitude 30% 30%
Middle latitude 10% 1%
Predicted Kp max 4
Solar activity
M-class solar flare 1%
X-class solar flare 1%
Moon phase
Waxing Crescent

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