Space Weather Alerts, Watches and Warnings
Issue Time: 2018 Aug 21 0636 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2822
Begin Time: 2018 Aug 18 1410 UTC
Yesterday Maximum 2MeV Flux: 4163 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Issue Time: 2018 Aug 20 1923 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Aug 20 1923 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
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.

Issue Time: 2018 Aug 20 1920 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Aug 20 1919 UTC
Valid To: 2018 Aug 21 0000 UTC
Warning Condition: Onset
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.

Issue Time: 2018 Aug 20 1916 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2821
Begin Time: 2018 Aug 18 1410 UTC
Yesterday Maximum 2MeV Flux: 18287 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Issue Time: 2018 Aug 20 0300 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Aug 20 0259 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
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.

Issue Time: 2018 Aug 20 0036 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Aug 20 0036 UTC
Valid To: 2018 Aug 20 1400 UTC
Warning Condition: Onset
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.

Issue Time: 2018 Aug 19 0859 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2820
Begin Time: 2018 Aug 18 1410 UTC
Yesterday Maximum 2MeV Flux: 7218 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Issue Time: 2018 Aug 18 1426 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2018 Aug 18 1410 UTC
Station: GOES15

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

Issue Time: 2018 Aug 18 0809 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Aug 18 0808 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
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.

Issue Time: 2018 Aug 18 0559 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Aug 18 0600 UTC
Valid To: 2018 Aug 18 1200 UTC
Warning Condition: Onset
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.

Issue Time: 2018 Aug 17 0413 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Aug 17 0412 UTC
Synoptic Period: 0300-0600 UTC

Active Warning: Yes
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.

Issue Time: 2018 Aug 17 0345 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Aug 17 0345 UTC
Valid To: 2018 Aug 17 0900 UTC
Warning Condition: Onset
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.

Issue Time: 2018 Aug 16 0203 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3511
Valid From: 2018 Aug 15 2215 UTC
Now Valid Until: 2018 Aug 16 1000 UTC
Warning Condition: Persistence
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.

Issue Time: 2018 Aug 16 0002 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Aug 15 2359 UTC
Synoptic Period: 2100-2359 UTC

Active Warning: Yes
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.

Issue Time: 2018 Aug 15 2212 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Aug 15 2215 UTC
Valid To: 2018 Aug 16 0300 UTC
Warning Condition: Onset
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.

Issue Time: 2018 Aug 15 1355 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Aug 15 1350 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
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.

Issue Time: 2018 Aug 15 1142 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Aug 15 1142 UTC
Valid To: 2018 Aug 15 1800 UTC
Warning Condition: Onset
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.

Issue Time: 2018 Aug 12 0000 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Aug 11 2359 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
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.

Issue Time: 2018 Aug 11 1436 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Aug 11 1436 UTC
Valid To: 2018 Aug 11 2359 UTC
Warning Condition: Onset
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.

Issue Time: 2018 Aug 07 1421 UTC
CANCEL WARNING: Geomagnetic K-index of 4 expected
Cancel Serial Number: 3507
Original Issue Time: 2018 Aug 07 1341 UTC
Comment: Date error
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.

Issue Time: 2018 Aug 07 1341 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Aug 10 1341 UTC
Valid To: 2018 Aug 10 1600 UTC
Warning Condition: Onset
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.

Issue Time: 2018 Jul 30 1637 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2818
Begin Time: 2018 Jul 25 1355 UTC
Yesterday Maximum 2MeV Flux: 3181 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Issue Time: 2018 Jul 29 1508 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2817
Begin Time: 2018 Jul 25 1355 UTC
Yesterday Maximum 2MeV Flux: 3095 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Issue Time: 2018 Jul 28 1246 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2816
Begin Time: 2018 Jul 25 1355 UTC
Yesterday Maximum 2MeV Flux: 3946 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Issue Time: 2018 Jul 27 1018 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2815
Begin Time: 2018 Jul 25 1355 UTC
Yesterday Maximum 2MeV Flux: 2572 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Issue Time: 2018 Jul 26 1233 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2814
Begin Time: 2018 Jul 25 1355 UTC
Yesterday Maximum 2MeV Flux: 3987 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Issue Time: 2018 Jul 25 1402 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2018 Jul 25 1355 UTC
Station: GOES15

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

Issue Time: 2018 Jul 24 2207 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Jul 24 2207 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
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.

Issue Time: 2018 Jul 24 1746 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3505
Valid From: 2018 Jul 24 0905 UTC
Now Valid Until: 2018 Jul 25 0900 UTC
Warning Condition: Persistence
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.

Issue Time: 2018 Jul 24 0905 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jul 24 0905 UTC
Valid To: 2018 Jul 24 1800 UTC
Warning Condition: Persistence
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.

Issue Time: 2018 Jul 24 0223 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Jul 24 0223 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
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.

Issue Time: 2018 Jul 24 0142 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jul 24 0144 UTC
Valid To: 2018 Jul 24 0900 UTC
Warning Condition: Onset
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.
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