Space Weather Message Code: WARK06 Serial Number: 374 Issue Time: 2017 Mar 27 2055 UTC EXTENDED WARNING: Geomagnetic K-Index of 6 expected Extension to Serial Number: 373 Valid From: 2017 Mar 27 1019 UTC Now Valid Until: 2017 Mar 28 0300 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 –

Space Weather Message Code: ALTK06 Serial Number: 426 Issue Time: 2017 Mar 27 1948 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2017 Mar 27 1948 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

Space Weather Message Code: ALTK05 Serial Number: 1082 Issue Time: 2017 Mar 27 1942 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Mar 27 1941 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.

Space Weather Message Code: ALTK05 Serial Number: 1081 Issue Time: 2017 Mar 27 1634 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Mar 27 1633 UTC Synoptic Period: 1500-1800 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.

Space Weather Message Code: WARK04 Serial Number: 3178 Issue Time: 2017 Mar 27 1442 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3177 Valid From: 2017 Mar 27 0350 UTC Now Valid Until: 2017 Mar 28 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 –

Space Weather Message Code: ALTK05 Serial Number: 1080 Issue Time: 2017 Mar 27 1409 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Mar 27 1408 UTC Synoptic Period: 1200-1500 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.

Space Weather Message Code: ALTK06 Serial Number: 425 Issue Time: 2017 Mar 27 1024 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2017 Mar 27 1024 UTC Synoptic Period: 0900-1200 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

Space Weather Message Code: WARK06 Serial Number: 372 Issue Time: 2017 Mar 27 1022 UTC WARNING: Geomagnetic K-Index of 6 expected Valid From: 2017 Mar 27 1019 UTC Valid To: 2017 Mar 27 1459 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

Space Weather Message Code: ALTK05 Serial Number: 1079 Issue Time: 2017 Mar 27 1007 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Mar 27 1005 UTC Synoptic Period: 0900-1200 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.

Space Weather Message Code: ALTK05 Serial Number: 1078 Issue Time: 2017 Mar 27 0740 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Mar 27 0735 UTC Synoptic Period: 0600-0900 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.