Space Weather Message Code: WARK04 Serial Number: 3469 Issue Time: 2018 May 05 1716 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3468 Valid From: 2018 May 05 1350 UTC Now Valid Until: 2018 May 06 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: ALTK04 Serial Number: 2051 Issue Time: 2018 May 05 1552 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2018 May 05 1552 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: 3468 Issue Time: 2018 May 05 1351 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 May 05 1350 UTC Valid To: 2018 May 05 1800 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: 827 Issue Time: 2018 May 04 1607 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: May 05: None (Below G1) May 06: G1 (Minor) May 07: 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: 826 Issue Time: 2018 May 03 1458 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: May 04: None (Below G1) May 05: None (Below G1) May 06: 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: 3467 Issue Time: 2018 Apr 21 1455 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3466 Valid From: 2018 Apr 20 0032 UTC Now Valid Until: 2018 Apr 21 2100 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: 3466 Issue Time: 2018 Apr 21 0555 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3465 Valid From: 2018 Apr 20 0032 UTC Now Valid Until: 2018 Apr 21 1500 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: 1216 Issue Time: 2018 Apr 20 1939 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2018 Apr 20 1938 UTC Synoptic Period: 1800-2100 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: 3465 Issue Time: 2018 Apr 20 1729 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3464 Valid From: 2018 Apr 20 0032 UTC Now Valid Until: 2018 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: WARK05 Serial Number: 1470 Issue Time: 2018 Apr 20 1727 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1469 Valid From: 2018 Apr 20 0510 UTC Now Valid Until: 2018 Apr 21 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 60 degrees Geomagnetic Latitude. Induced Currents –