Space Weather Message Code: ALTK05 Serial Number: 1006 Issue Time: 2016 Sep 25 0559 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Sep 25 0559 UTC Synoptic Period: 0300-0600 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: 1231 Issue Time: 2016 Sep 25 0417 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2016 Sep 25 0415 UTC Valid To: 2016 Sep 25 0900 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: 1923 Issue Time: 2016 Sep 25 0222 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Sep 25 0220 UTC Synoptic Period: 0000-0300 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: 2982 Issue Time: 2016 Sep 25 0202 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Sep 25 0200 UTC Valid To: 2016 Sep 25 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

Space Weather Message Code: ALTK04 Serial Number: 1922 Issue Time: 2016 Sep 21 0225 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Sep 21 0210 UTC Synoptic Period: 0000-0300 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: 1230 Issue Time: 2016 Sep 21 0217 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2016 Sep 21 0220 UTC Valid To: 2016 Sep 21 0800 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: 2981 Issue Time: 2016 Sep 21 0213 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Sep 21 0210 UTC Valid To: 2016 Sep 21 1400 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: 2980 Issue Time: 2016 Sep 21 0211 UTC CANCEL WARNING: Geomagnetic K-index of 4 expected Cancel Serial Number: 2979 Original Issue Time: 2016 Sep 19 1536 UTC Comment: Cancelling and reissuing to correct valid time. 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

Space Weather Message Code: WARK04 Serial Number: 2979 Issue Time: 2016 Sep 21 0210 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 2978 Valid From: 2016 Sep 19 1535 UTC Now Valid Until: 2016 Sep 20 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: 2978 Issue Time: 2016 Sep 20 1536 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 2977 Valid From: 2016 Sep 19 1535 UTC Now Valid Until: 2016 Sep 21 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 –