Space Weather Message Code: WARK04 Serial Number: 3601 Issue Time: 2019 Feb 28 1340 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3600 Valid From: 2019 Feb 27 1730 UTC Now Valid Until: 2019 Mar 01 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 65 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WARK04 Serial Number: 3600 Issue Time: 2019 Feb 28 0552 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3599 Valid From: 2019 Feb 27 1730 UTC Now Valid Until: 2019 Feb 28 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 –

Space Weather Message Code: ALTK05 Serial Number: 1258 Issue Time: 2019 Feb 28 0300 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Feb 28 0259 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: 1513 Issue Time: 2019 Feb 27 2311 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2019 Feb 27 2311 UTC Valid To: 2019 Feb 28 0600 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: 2102 Issue Time: 2019 Feb 27 2240 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Feb 27 2241 UTC Synoptic Period: 2100-2400 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: 3599 Issue Time: 2019 Feb 27 1728 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Feb 27 1730 UTC Valid To: 2019 Feb 28 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: WATA20 Serial Number: 853 Issue Time: 2019 Feb 25 2016 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Feb 26: None (Below G1) Feb 27: G1 (Minor) Feb 28: 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 60 degrees Geomagnetic Latitude. Induced

Space Weather Message Code: WATA20 Serial Number: 852 Issue Time: 2019 Feb 24 1459 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Feb 25: None (Below G1) Feb 26: None (Below G1) Feb 27: 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 60 degrees Geomagnetic Latitude.

Space Weather Message Code: ALTK04 Serial Number: 2101 Issue Time: 2019 Feb 21 0708 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Feb 21 0708 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: 3598 Issue Time: 2019 Feb 21 0653 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Feb 21 0652 UTC Valid To: 2019 Feb 21 1200 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