SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0953 AM CST Tue Jan 20 2026 Valid 201630Z - 211200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not forecast across the U.S. today or tonight. ...Discussion... A prominent longwave trough will remain entrenched from the Rockies to the western Atlantic, with a general prevalence of cold/dry continental trajectories and surface high pressure over the eastern third of the CONUS. Airmass modification will occur with a modest increase in low-level moisture toward coastal Texas tonight. However, instability is expected to remain too limited to support thunderstorms through tonight. ..Guyer/Lyons.. 01/20/2026
