Space Weather Message Code: WARK04 Serial Number: 3146 Issue Time: 2017 Feb 24 2352 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3145 Valid From: 2017 Feb 23 1641 UTC Now Valid Until: 2017 Feb 25 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 –

Space Weather Message Code: WARK04 Serial Number: 3145 Issue Time: 2017 Feb 24 1756 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3144 Valid From: 2017 Feb 23 1641 UTC Now Valid Until: 2017 Feb 24 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 –

Space Weather Message Code: WARK04 Serial Number: 3144 Issue Time: 2017 Feb 24 1255 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3143 Valid From: 2017 Feb 23 1641 UTC Now Valid Until: 2017 Feb 24 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 65 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK05 Serial Number: 1062 Issue Time: 2017 Feb 24 0135 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Feb 24 0135 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: WARK05 Serial Number: 1309 Issue Time: 2017 Feb 24 0048 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Feb 24 0047 UTC Valid To: 2017 Feb 24 1000 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

Space Weather Message Code: ALTK04 Serial Number: 1956 Issue Time: 2017 Feb 24 0038 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Feb 24 0035 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

Space Weather Message Code: WARK04 Serial Number: 3143 Issue Time: 2017 Feb 23 2346 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3142 Valid From: 2017 Feb 23 1641 UTC Now Valid Until: 2017 Feb 24 1300 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 –

Space Weather Message Code: WATA20 Serial Number: 770 Issue Time: 2017 Feb 23 2010 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Feb 24: G1 (Minor) Feb 25: None (Below G1) Feb 26: None (Below G1) 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.

Space Weather Message Code: WARK04 Serial Number: 3142 Issue Time: 2017 Feb 23 1641 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Feb 23 1641 UTC Valid To: 2017 Feb 23 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

Space Weather Message Code: ALTK04 Serial Number: 1955 Issue Time: 2017 Feb 22 0240 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Feb 22 0239 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