Space Weather Message Code: WARK05 Serial Number: 2068 Issue Time: 2025 Jun 13 1332 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 2067 Valid From: 2025 Jun 12 2020 UTC Now Valid Until: 2025 Jun 13 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WARK06 Serial Number: 594 Issue Time: 2025 Jun 13 1331 UTC WARNING: Geomagnetic K-Index of 6 expected Valid From: 2025 Jun 13 1331 UTC Valid To: 2025 Jun 13 2100 UTC Warning Condition: Onset 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

Space Weather Message Code: ALTK05 Serial Number: 1814 Issue Time: 2025 Jun 13 1300 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2025 Jun 13 1300 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: WARK04 Serial Number: 5001 Issue Time: 2025 Jun 13 1133 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5000 Valid From: 2025 Jun 11 1710 UTC Now Valid Until: 2025 Jun 13 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: WARK05 Serial Number: 2067 Issue Time: 2025 Jun 13 1132 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 2066 Valid From: 2025 Jun 12 2020 UTC Now Valid Until: 2025 Jun 13 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: 1813 Issue Time: 2025 Jun 13 0827 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2025 Jun 13 0814 UTC Synoptic Period: 0600-0900 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: 5000 Issue Time: 2025 Jun 13 0609 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4999 Valid From: 2025 Jun 11 1710 UTC Now Valid Until: 2025 Jun 13 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: ALTK06 Serial Number: 647 Issue Time: 2025 Jun 13 0608 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2025 Jun 13 0559 UTC Synoptic Period: 0300-0600 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: WARK05 Serial Number: 2066 Issue Time: 2025 Jun 13 0555 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 2065 Valid From: 2025 Jun 12 2020 UTC Now Valid Until: 2025 Jun 13 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WARK06 Serial Number: 593 Issue Time: 2025 Jun 13 0554 UTC EXTENDED WARNING: Geomagnetic K-Index of 6 expected Extension to Serial Number: 592 Valid From: 2025 Jun 12 2206 UTC Now Valid Until: 2025 Jun 13 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 55 degrees Geomagnetic Latitude. Induced Currents –