Space Weather Message Code: WARK04 Serial Number: 3506 Issue Time: 2018 Jul 24 1746 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3505 Valid From: 2018 Jul 24 0905 UTC Now Valid Until: 2018 Jul 25 0900 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: 3505 Issue Time: 2018 Jul 24 0905 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Jul 24 0905 UTC Valid To: 2018 Jul 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 – Weak power grid fluctuations can occur. Aurora

Space Weather Message Code: ALTK04 Serial Number: 2063 Issue Time: 2018 Jul 24 0223 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2018 Jul 24 0223 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: 3504 Issue Time: 2018 Jul 24 0142 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Jul 24 0144 UTC Valid To: 2018 Jul 24 0900 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: 834 Issue Time: 2018 Jul 21 1831 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jul 22: None (Below G1) Jul 23: None (Below G1) Jul 24: 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: WARK04 Serial Number: 3503 Issue Time: 2018 Jul 21 1333 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Jul 21 1334 UTC Valid To: 2018 Jul 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: 3502 Issue Time: 2018 Jul 17 0552 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Jul 17 0551 UTC Valid To: 2018 Jul 17 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: 3501 Issue Time: 2018 Jul 06 0255 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3500 Valid From: 2018 Jul 05 1310 UTC Now Valid Until: 2018 Jul 06 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 65 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WATA20 Serial Number: 833 Issue Time: 2018 Jun 27 1526 UTC CANCEL WATCH: Geomagnetic Storm Category G1 Predicted Cancel Serial Number: 832 Original Issue Time: 2018 Jun 25 2040 UTC Comment: Conditions no longer valid 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: 3498 Issue Time: 2018 Jun 26 1932 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Jun 26 1931 UTC Valid To: 2018 Jun 27 0300 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