Space Weather Message Code: ALTK05 Serial Number: 1262 Issue Time: 2019 May 11 0223 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 May 11 0220 UTC Synoptic Period: 0000-0300 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: WARK05 Serial Number: 1518 Issue Time: 2019 May 11 0218 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2019 May 11 0218 UTC Valid To: 2019 May 11 0600 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: 2112 Issue Time: 2019 May 11 0201 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 May 11 0200 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: 3624 Issue Time: 2019 May 11 0152 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 May 11 0152 UTC Valid To: 2019 May 11 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: 3623 Issue Time: 2019 May 02 0547 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3622 Valid From: 2019 May 01 1907 UTC Now Valid Until: 2019 May 02 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: ALTK04 Serial Number: 2111 Issue Time: 2019 May 01 2223 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 May 01 2222 UTC Synoptic Period: 2100-2400 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: 3622 Issue Time: 2019 May 01 1907 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 May 01 1907 UTC Valid To: 2019 May 02 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: 3621 Issue Time: 2019 Apr 23 2037 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Apr 23 2040 UTC Valid To: 2019 Apr 24 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: 3620 Issue Time: 2019 Apr 13 0052 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Apr 13 0051 UTC Valid To: 2019 Apr 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 65 degrees Geomagnetic Latitude. Induced Currents – Weak power grid fluctuations can occur. Aurora

Space Weather Message Code: WARK04 Serial Number: 3619 Issue Time: 2019 Apr 10 1804 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Apr 10 1800 UTC Valid To: 2019 Apr 11 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