Space Weather Message Code: WARK05 Serial Number: 1855 Issue Time: 2024 Mar 21 1342 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2024 Mar 21 1342 UTC Valid To: 2024 Mar 21 2100 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: 2433 Issue Time: 2024 Mar 21 1340 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Mar 21 1338 UTC Synoptic Period: 1200-1500 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: 4562 Issue Time: 2024 Mar 21 1128 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4561 Valid From: 2024 Mar 21 0304 UTC Now Valid Until: 2024 Mar 21 2100 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: WARK04 Serial Number: 4561 Issue Time: 2024 Mar 21 0304 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Mar 21 0304 UTC Valid To: 2024 Mar 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

Space Weather Message Code: WATA20 Serial Number: 991 Issue Time: 2024 Mar 18 1011 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Mar 19: None (Below G1) Mar 20: G1 (Minor) Mar 21: 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: ALTK04 Serial Number: 2432 Issue Time: 2024 Mar 15 0301 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Mar 15 0259 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: 4560 Issue Time: 2024 Mar 15 0055 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Mar 15 0055 UTC Valid To: 2024 Mar 15 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

Space Weather Message Code: WARK04 Serial Number: 4559 Issue Time: 2024 Mar 13 0739 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Mar 13 0738 UTC Valid To: 2024 Mar 13 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: 2431 Issue Time: 2024 Mar 09 0001 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Mar 08 2359 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: 4558 Issue Time: 2024 Mar 08 2232 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Mar 08 2231 UTC Valid To: 2024 Mar 09 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