Conditions are coming together for a major winter storm to impact the eastern half of the United States late this week into this weekend, bringing extreme cold, snow, sleet, and freezing rain across a large swath of the country. | NOAA NWS Weather Prediction Center

SWPC Video Update from Shawn Dahl, SWPC Service Coordinator about the severe G4 and S4 ongoing storms. Apologies for the hastiness of this, but we have been very busy notifying aviation, power grid, FEMA, and more about these storms. Stay aware at spaceweather.gov | NOAA NWS Space Weather Prediction Center

A video update with Shawn Dahl, SWPC Service Coordinator, on CME progression & how we analyze & interpret geomagnetic storm activity and solar wind environment; with info about what to look for tonight regarding aurora chances. Stay space weather aware at spaceweather.gov | NOAA NWS Space Weather Prediction Center