National Weather Service Raw Text Product
Displaying AFOS PIL: ALTK08 Received: 2023-03-24 04:21 UTC Previous in Time Latest Product Next in Time
View All KWNP Products for 24 Mar 2023 View All ALT Products for 24 Mar 2023 View As Image Download As Text
819 WOXX15 KWNP 240421 ALTK08 Space Weather Message Code: ALTK08 Serial Number: 26 Issue Time: 2023 Mar 24 0416 UTC ALERT: Geomagnetic K-index of 8, 9- Threshold Reached: 2023 Mar 24 0404 UTC Synoptic Period: 0300-0600 UTC Active Warning: Yes NOAA Scale: G4 - Severe www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude. Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify. Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur. Navigation - Satellite navigation (GPS) degraded or inoperable for hours. Radio - HF (high frequency) radio propagation sporadic or blacked out. Aurora - Aurora may be seen as low as Alabama and northern California. # Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Recent messages, data, and help at http://swpc.noaa.gov/alerts/ # Send questions to SWPC.Webmaster@noaa.gov