Space Weather Message Code: ALTK05 Serial Number: 1074 Issue Time: 2017 Mar 21 1614 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Mar 21 1612 UTC Synoptic Period: 1500-1800 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: 1321 Issue Time: 2017 Mar 21 1607 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Mar 21 1608 UTC Valid To: 2017 Mar 21 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: WATA20 Serial Number: 776 Issue Time: 2017 Mar 21 1429 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Mar 22: G1 (Minor) Mar 23: G1 (Minor) Mar 24: None (Below G1) 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: WARK04 Serial Number: 3172 Issue Time: 2017 Mar 21 1418 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3171 Valid From: 2017 Mar 21 0605 UTC Now Valid Until: 2017 Mar 22 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: ALTK04 Serial Number: 1965 Issue Time: 2017 Mar 21 0802 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Mar 21 0801 UTC Synoptic Period: 0600-0900 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: WARK05 Serial Number: 1320 Issue Time: 2017 Mar 21 0621 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Mar 21 0621 UTC Valid To: 2017 Mar 21 1200 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: WARK04 Serial Number: 3171 Issue Time: 2017 Mar 21 0605 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Mar 21 0605 UTC Valid To: 2017 Mar 21 1500 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: 775 Issue Time: 2017 Mar 20 1950 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Mar 21: None (Below G1) Mar 22: None (Below G1) Mar 23: 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: ALTK04 Serial Number: 1964 Issue Time: 2017 Mar 12 0408 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Mar 12 0402 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: 3170 Issue Time: 2017 Mar 12 0354 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Mar 12 0353 UTC Valid To: 2017 Mar 12 1300 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