Space Weather Message Code: WATA20 Serial Number: 788 Issue Time: 2017 Jun 15 1934 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jun 16: G1 (Minor) Jun 17: None (Below G1) Jun 18: 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.

Space Weather Message Code: WARK04 Serial Number: 3232 Issue Time: 2017 Jun 12 0544 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3231 Valid From: 2017 Jun 11 1434 UTC Now Valid Until: 2017 Jun 12 1400 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: 3231 Issue Time: 2017 Jun 11 2027 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3230 Valid From: 2017 Jun 11 1434 UTC Now Valid Until: 2017 Jun 12 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: ALTK05 Serial Number: 1116 Issue Time: 2017 Jun 11 1801 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Jun 11 1759 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: 1358 Issue Time: 2017 Jun 11 1735 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Jun 11 1733 UTC Valid To: 2017 Jun 11 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: ALTK04 Serial Number: 1983 Issue Time: 2017 Jun 11 1652 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Jun 11 1650 UTC Synoptic Period: 1500-1800 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: 3230 Issue Time: 2017 Jun 11 1434 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Jun 11 1434 UTC Valid To: 2017 Jun 11 2100 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: 787 Issue Time: 2017 Jun 04 1010 UTC CANCEL WATCH: Geomagnetic Storm Category G1 Predicted Cancel Serial Number: 786 Original Issue Time: 2017 Jun 03 1844 UTC Comment: A decrease in solar wind enhancement has deminished the potential for G1 (Minor) geomagnetic storms. 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

Space Weather Message Code: WATA20 Serial Number: 786 Issue Time: 2017 Jun 03 1844 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jun 04: G1 (Minor) Jun 05: None (Below G1) Jun 06: 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.

Space Weather Message Code: ALTK04 Serial Number: 1982 Issue Time: 2017 Jun 03 1646 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Jun 03 1645 UTC Synoptic Period: 1500-1800 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