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000
WOXX13 KWNP 172115
WARK04

Space Weather Message Code: WARK04
Serial Number: 2527
Issue Time: 2015 Apr 17 2114 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2526
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 18 0700 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX13 KWNP 172115
WARK04

Space Weather Message Code: WARK04
Serial Number: 2527
Issue Time: 2015 Apr 17 2114 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2526
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 18 0700 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 171334
WARK04

Space Weather Message Code: WARK04
Serial Number: 2526
Issue Time: 2015 Apr 17 1255 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2525
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 17 2200 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX13 KWNP 171334
WARK04

Space Weather Message Code: WARK04
Serial Number: 2526
Issue Time: 2015 Apr 17 1255 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2525
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 17 2200 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 171334
WARK04

Space Weather Message Code: WARK04
Serial Number: 2526
Issue Time: 2015 Apr 17 1255 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2525
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 17 2200 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX11 KWNP 170700
WARK05

Space Weather Message Code: WARK05
Serial Number: 1000
Issue Time: 2015 Apr 17 0657 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 999
Valid From: 2015 Apr 15 0508 UTC
Now Valid Until: 2015 Apr 17 1000 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 170700
WARK04

Space Weather Message Code: WARK04
Serial Number: 2525
Issue Time: 2015 Apr 17 0657 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2524
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 17 1300 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 170700
WARK04

Space Weather Message Code: WARK04
Serial Number: 2525
Issue Time: 2015 Apr 17 0657 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2524
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 17 1300 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX13 KWNP 170700
WARK04

Space Weather Message Code: WARK04
Serial Number: 2525
Issue Time: 2015 Apr 17 0657 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2524
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 17 1300 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX13 KWNP 170700
WARK04

Space Weather Message Code: WARK04
Serial Number: 2525
Issue Time: 2015 Apr 17 0657 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2524
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 17 1300 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX11 KWNP 170700
WARK05

Space Weather Message Code: WARK05
Serial Number: 1000
Issue Time: 2015 Apr 17 0657 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 999
Valid From: 2015 Apr 15 0508 UTC
Now Valid Until: 2015 Apr 17 1000 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX12 KWNP 162331
WARK06

Space Weather Message Code: WARK06
Serial Number: 264
Issue Time: 2015 Apr 16 2328 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 263
Valid From: 2015 Apr 16 2321 UTC
Now Valid Until: 2015 Apr 17 0400 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX12 KWNP 162331
WARK06

Space Weather Message Code: WARK06
Serial Number: 264
Issue Time: 2015 Apr 16 2328 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 263
Valid From: 2015 Apr 16 2321 UTC
Now Valid Until: 2015 Apr 17 0400 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX12 KWNP 162325
WARK06

Space Weather Message Code: WARK06
Serial Number: 263
Issue Time: 2015 Apr 16 2321 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2015 Apr 16 2321 UTC
Valid To: 2015 Apr 17 0100 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX12 KWNP 162325
WARK06

Space Weather Message Code: WARK06
Serial Number: 263
Issue Time: 2015 Apr 16 2321 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2015 Apr 16 2321 UTC
Valid To: 2015 Apr 17 0100 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX11 KWNP 161808
WARK05

Space Weather Message Code: WARK05
Serial Number: 999
Issue Time: 2015 Apr 16 1737 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 998
Valid From: 2015 Apr 15 0508 UTC
Now Valid Until: 2015 Apr 17 0700 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX11 KWNP 161808
WARK05

Space Weather Message Code: WARK05
Serial Number: 999
Issue Time: 2015 Apr 16 1737 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 998
Valid From: 2015 Apr 15 0508 UTC
Now Valid Until: 2015 Apr 17 0700 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 161753
WARK04

Space Weather Message Code: WARK04
Serial Number: 2524
Issue Time: 2015 Apr 16 1737 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2523
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 17 0900 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX13 KWNP 161753
WARK04

Space Weather Message Code: WARK04
Serial Number: 2524
Issue Time: 2015 Apr 16 1737 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2523
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 17 0900 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 161753
WARK04

Space Weather Message Code: WARK04
Serial Number: 2524
Issue Time: 2015 Apr 16 1737 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2523
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 17 0900 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX13 KWNP 161341
WARK04

Space Weather Message Code: WARK04
Serial Number: 2523
Issue Time: 2015 Apr 16 1339 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2522
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 16 2100 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX11 KWNP 161341
WARK05

Space Weather Message Code: WARK05
Serial Number: 998
Issue Time: 2015 Apr 16 1338 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 997
Valid From: 2015 Apr 15 0508 UTC
Now Valid Until: 2015 Apr 16 1800 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 161341
WARK04

Space Weather Message Code: WARK04
Serial Number: 2523
Issue Time: 2015 Apr 16 1339 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2522
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 16 2100 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX13 KWNP 161341
WARK04

Space Weather Message Code: WARK04
Serial Number: 2523
Issue Time: 2015 Apr 16 1339 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2522
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 16 2100 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX13 KWNP 160635
WARK04

Space Weather Message Code: WARK04
Serial Number: 2522
Issue Time: 2015 Apr 16 0634 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2521
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 16 1600 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX11 KWNP 160635
WARK05

Space Weather Message Code: WARK05
Serial Number: 997
Issue Time: 2015 Apr 16 0634 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 996
Valid From: 2015 Apr 15 0508 UTC
Now Valid Until: 2015 Apr 16 1400 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 160635
WARK04

Space Weather Message Code: WARK04
Serial Number: 2522
Issue Time: 2015 Apr 16 0634 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2521
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 16 1600 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX13 KWNP 160635
WARK04

Space Weather Message Code: WARK04
Serial Number: 2522
Issue Time: 2015 Apr 16 0634 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2521
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 16 1600 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX11 KWNP 160635
WARK05

Space Weather Message Code: WARK05
Serial Number: 997
Issue Time: 2015 Apr 16 0634 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 996
Valid From: 2015 Apr 15 0508 UTC
Now Valid Until: 2015 Apr 16 1400 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 160635
WARK04

Space Weather Message Code: WARK04
Serial Number: 2522
Issue Time: 2015 Apr 16 0634 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2521
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 16 1600 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 152200
WARK04

Space Weather Message Code: WARK04
Serial Number: 2521
Issue Time: 2015 Apr 15 2158 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2520
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 16 1400 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX11 KWNP 152200
WARK05

Space Weather Message Code: WARK05
Serial Number: 996
Issue Time: 2015 Apr 15 2158 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 995
Valid From: 2015 Apr 15 0508 UTC
Now Valid Until: 2015 Apr 16 0700 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 152200
WARK04

Space Weather Message Code: WARK04
Serial Number: 2521
Issue Time: 2015 Apr 15 2158 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2520
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 16 1400 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX11 KWNP 151900
WARK05

Space Weather Message Code: WARK05
Serial Number: 995
Issue Time: 2015 Apr 15 1856 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 994
Valid From: 2015 Apr 15 0508 UTC
Now Valid Until: 2015 Apr 15 2200 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX13 KWNP 151601
WARK04

Space Weather Message Code: WARK04
Serial Number: 2520
Issue Time: 2015 Apr 15 1555 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2519
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 15 2200 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov




000
WOXX13 KWNP 151601
WARK04

Space Weather Message Code: WARK04
Serial Number: 2520
Issue Time: 2015 Apr 15 1555 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2519
Valid From: 2015 Apr 14 2020 UTC
Now Valid Until: 2015 Apr 15 2200 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX12 KWNP 151412
WARK06

Space Weather Message Code: WARK06
Serial Number: 262
Issue Time: 2015 Apr 15 1407 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2015 Apr 15 1405 UTC
Valid To: 2015 Apr 15 1900 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX11 KWNP 151225
WARK05

Space Weather Message Code: WARK05
Serial Number: 994
Issue Time: 2015 Apr 15 1224 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 993
Valid From: 2015 Apr 15 0508 UTC
Now Valid Until: 2015 Apr 15 1900 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX11 KWNP 151225
WARK05

Space Weather Message Code: WARK05
Serial Number: 994
Issue Time: 2015 Apr 15 1224 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 993
Valid From: 2015 Apr 15 0508 UTC
Now Valid Until: 2015 Apr 15 1900 UTC
Warning Condition: Persistence
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





000
WOXX11 KWNP 150510
WARK05

Space Weather Message Code: WARK05
Serial Number: 993
Issue Time: 2015 Apr 15 0508 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2015 Apr 15 0508 UTC
Valid To: 2015 Apr 15 1300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
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.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov





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