Meteorologists at Weather Prediction Center and the National Weather Service are working around the clock to forecast the upcoming major winter storm. Be prepared and visit weather.gov for the most up-to-date winter forecasts. | NOAA NWS Weather Prediction Center

An Overview to SPC for Excel - Version 5

🚨ALERT: S4 SEVERE SOLAR RADIATION STORM – STRONGEST IN 20 YEARS NOAA’s Space Weather Prediction Center has confirmed an S4 Severe solar radiation storm in progress on January 19, 2026. Their bulletin says radiation levels measured by GOES satellites have climbed into the Severe category on the NOAA scale and that this is the largest solar radiation storm since the October 2003 “Halloween” event. On top of that, the impact of a coronal mass ejection has pushed Earth into a G4 Severe geomagnetic