Space Weather Message Code: ALTK04 Serial Number: 1950 Issue Time: 2017 Jan 31 1001 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Jan 31 1000 UTC Synoptic Period: 0900-1200 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: 3121 Issue Time: 2017 Jan 31 0755 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Jan 31 0755 UTC Valid To: 2017 Jan 31 1800 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: 767 Issue Time: 2017 Jan 29 1420 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jan 30: None (Below G1) Jan 31: G1 (Minor) Feb 01: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Comment: G1 conditions are anticipated due to effects from a negative polarity coronal hole. NOAA Space Weather Scale descriptions can be found at

Space Weather Message Code: WATA20 Serial Number: 766 Issue Time: 2017 Jan 28 1830 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jan 29: None (Below G1) Jan 30: None (Below G1) Jan 31: 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: 3120 Issue Time: 2017 Jan 27 2057 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3119 Valid From: 2017 Jan 26 1350 UTC Now Valid Until: 2017 Jan 28 0300 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: 3119 Issue Time: 2017 Jan 27 0539 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3118 Valid From: 2017 Jan 26 1350 UTC Now Valid Until: 2017 Jan 27 2100 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: WARK05 Serial Number: 1299 Issue Time: 2017 Jan 27 0136 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Jan 27 0136 UTC Valid To: 2017 Jan 27 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: WARK04 Serial Number: 3118 Issue Time: 2017 Jan 26 2342 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3117 Valid From: 2017 Jan 26 1350 UTC Now Valid Until: 2017 Jan 27 1300 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: 1949 Issue Time: 2017 Jan 26 1805 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Jan 26 1759 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: 3117 Issue Time: 2017 Jan 26 1350 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Jan 26 1350 UTC Valid To: 2017 Jan 26 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 – Weak power grid fluctuations can occur. Aurora