Space Weather Message Code: WATA30 Serial Number: 178 Issue Time: 2019 Mar 21 0851 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Mar 22: None (Below G1) Mar 23: G2 (Moderate) Mar 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 55 degrees Geomagnetic Latitude. Induced

Space Weather Message Code: WATA30 Serial Number: 177 Issue Time: 2019 Mar 20 2151 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Mar 21: None (Below G1) Mar 22: None (Below G1) Mar 23: G2 (Moderate) 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 55 degrees Geomagnetic Latitude.

Space Weather Message Code: WARK04 Serial Number: 3608 Issue Time: 2019 Mar 17 1058 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3607 Valid From: 2019 Mar 16 2147 UTC Now Valid Until: 2019 Mar 17 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 –

Space Weather Message Code: WARK04 Serial Number: 3607 Issue Time: 2019 Mar 17 0539 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3606 Valid From: 2019 Mar 16 2147 UTC Now Valid Until: 2019 Mar 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 –

Space Weather Message Code: ALTK05 Serial Number: 1261 Issue Time: 2019 Mar 17 0248 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2019 Mar 17 0245 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: 1517 Issue Time: 2019 Mar 17 0245 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2019 Mar 17 0244 UTC Valid To: 2019 Mar 17 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: 2104 Issue Time: 2019 Mar 16 2238 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Mar 16 2228 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: 3606 Issue Time: 2019 Mar 16 2147 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Mar 16 2147 UTC Valid To: 2019 Mar 17 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: WATA20 Serial Number: 855 Issue Time: 2019 Mar 08 2120 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Mar 09: None (Below G1) Mar 10: None (Below G1) Mar 11: 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: 3605 Issue Time: 2019 Mar 06 0744 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Mar 06 0745 UTC Valid To: 2019 Mar 06 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