Space Weather Message Code: WARK05 Serial Number: 1329 Issue Time: 2017 Mar 28 0240 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1328 Valid From: 2017 Mar 27 0520 UTC Now Valid Until: 2017 Mar 28 1800 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 –

Space Weather Message Code: ALTK05 Serial Number: 1084 Issue Time: 2017 Mar 28 0119 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Mar 28 0117 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.

Space Weather Message Code: ALTK05 Serial Number: 1083 Issue Time: 2017 Mar 28 0012 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Mar 27 2339 UTC Synoptic Period: 2100-0000 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: WATA30 Serial Number: 152 Issue Time: 2017 Mar 27 2116 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Mar 28: G2 (Moderate) Mar 29: G2 (Moderate) Mar 30: 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 55 degrees Geomagnetic Latitude. Induced Currents

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.