Space Weather Message Code: ALTK04 Serial Number: 2033 Issue Time: 2018 Feb 17 0525 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2018 Feb 16 0523 UTC Synoptic Period: 0300-0600 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: 3415 Issue Time: 2018 Feb 17 0518 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Feb 17 0518 UTC Valid To: 2018 Feb 17 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: WARK04 Serial Number: 3414 Issue Time: 2018 Feb 15 2252 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3413 Valid From: 2018 Feb 15 1335 UTC Now Valid Until: 2018 Feb 16 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 –

Space Weather Message Code: WARK05 Serial Number: 1449 Issue Time: 2018 Feb 15 1716 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2018 Feb 15 1715 UTC Valid To: 2018 Feb 15 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: 2032 Issue Time: 2018 Feb 15 1715 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2018 Feb 15 1711 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: 3413 Issue Time: 2018 Feb 15 1714 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3412 Valid From: 2018 Feb 15 1335 UTC Now Valid Until: 2018 Feb 15 2300 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: 3412 Issue Time: 2018 Feb 15 1334 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Feb 15 1335 UTC Valid To: 2018 Feb 15 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: 817 Issue Time: 2018 Feb 13 2105 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Feb 14: None (Below G1) Feb 15: G1 (Minor) Feb 16: 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: 816 Issue Time: 2018 Feb 12 2050 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Feb 13: None (Below G1) Feb 14: None (Below G1) Feb 15: 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: 3411 Issue Time: 2018 Jan 26 0151 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2018 Jan 26 0150 UTC Valid To: 2018 Jan 26 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