Space Weather Message Code: WARK04 Serial Number: 3730 Issue Time: 2020 May 06 0246 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 May 06 0245 UTC Valid To: 2020 May 06 0600 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: WARK04 Serial Number: 3729 Issue Time: 2020 Apr 21 2356 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3728 Valid From: 2020 Apr 21 1752 UTC Now Valid Until: 2020 Apr 22 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: ALTK04 Serial Number: 2155 Issue Time: 2020 Apr 21 1800 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2020 Apr 21 1759 UTC Synoptic Period: 1500-1800 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: 3728 Issue Time: 2020 Apr 21 1754 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Apr 21 1752 UTC Valid To: 2020 Apr 21 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: WARK04 Serial Number: 3727 Issue Time: 2020 Apr 20 2354 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3726 Valid From: 2020 Apr 20 0526 UTC Now Valid Until: 2020 Apr 21 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: ALTK05 Serial Number: 1294 Issue Time: 2020 Apr 20 1420 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2020 Apr 20 1418 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: ALTK05 Serial Number: 1293 Issue Time: 2020 Apr 20 1045 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2020 Apr 20 1044 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: WARK05 Serial Number: 1550 Issue Time: 2020 Apr 20 1010 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2020 Apr 20 1010 UTC Valid To: 2020 Apr 20 1500 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: 2154 Issue Time: 2020 Apr 20 0857 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2020 Apr 20 0855 UTC Synoptic Period: 0600-0900 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: 3725 Issue Time: 2020 Apr 20 0527 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2020 Apr 20 0526 UTC Valid To: 2020 Apr 20 1500 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