SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0648 AM CST Tue Jan 20 2026 Valid 201300Z - 211200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not forecast across the U.S. today or tonight. ...Synopsis and Discussion... With large-scale upper troughing persisting over central/eastern Canada and the CONUS today, expansive surface high pressure in place across the MS/OH Valleys and eastern states will shift gradually eastward as weak surface lee troughing/low development occurs across the central High Plains. Modest low-level moisture will advance slightly inland across parts of deep south into coastal/east TX, but instability is expected to remain too limited to support thunderstorms through the end of the period. ..Gleason/Dean.. 01/20/2026
