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

Space Weather Message Code: ALTK04 Serial Number: 1963 Issue Time: 2017 Mar 10 0826 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Mar 10 0825 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: WARK04 Serial Number: 3169 Issue Time: 2017 Mar 10 0731 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Mar 10 0730 UTC Valid To: 2017 Mar 10 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

Space Weather Message Code: WARK04 Serial Number: 3168 Issue Time: 2017 Mar 09 1756 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3167 Valid From: 2017 Mar 08 2044 UTC Now Valid Until: 2017 Mar 09 2359 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: 3167 Issue Time: 2017 Mar 09 1149 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3166 Valid From: 2017 Mar 08 2044 UTC Now Valid Until: 2017 Mar 09 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 –