Space Weather Message Code: WARK04 Serial Number: 3691 Issue Time: 2019 Nov 11 0959 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Nov 11 1000 UTC Valid To: 2019 Nov 11 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: 2135 Issue Time: 2019 Oct 31 0209 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Oct 31 0208 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: 3690 Issue Time: 2019 Oct 31 0043 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Oct 31 0043 UTC Valid To: 2019 Oct 31 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 – Weak power grid fluctuations can occur. Aurora

Space Weather Message Code: WARK04 Serial Number: 3689 Issue Time: 2019 Oct 28 1217 UTC CANCEL WARNING: Geomagnetic K-index of 4 expected Cancel Serial Number: 3688 Original Issue Time: 2019 Oct 24 1103 UTC Comment: Active conditions no longer expected. 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

Space Weather Message Code: WARK04 Serial Number: 3688 Issue Time: 2019 Oct 28 0531 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3687 Valid From: 2019 Oct 24 1102 UTC Now Valid Until: 2019 Oct 28 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: WARK04 Serial Number: 3687 Issue Time: 2019 Oct 27 1156 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3686 Valid From: 2019 Oct 24 1102 UTC Now Valid Until: 2019 Oct 28 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: 1545 Issue Time: 2019 Oct 26 2341 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1544 Valid From: 2019 Oct 26 1600 UTC Now Valid Until: 2019 Oct 27 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WARK05 Serial Number: 1544 Issue Time: 2019 Oct 26 1600 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2019 Oct 26 1600 UTC Valid To: 2019 Oct 26 2359 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: WARK05 Serial Number: 1545 Issue Time: 2019 Oct 26 2341 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1544 Valid From: 2019 Oct 26 1600 UTC Now Valid Until: 2019 Oct 27 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WARK05 Serial Number: 1544 Issue Time: 2019 Oct 26 1600 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2019 Oct 26 1600 UTC Valid To: 2019 Oct 26 2359 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