SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0147 PM CST Sun Jan 18 2026 Valid 182000Z - 191200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast across the U.S. today or tonight. ...20 Update... The thunder area was removed from the southern Florida Peninsula as activity has moved offshore. Thunder chances are expected to be less than 10% across the CONUS through the end of the period. ..Thornton.. 01/18/2026 .PREV DISCUSSION... /ISSUED 1014 AM CST Sun Jan 18 2026/ ...Discussion including South Florida... A longwave trough will remain prominent east of the Rockies, with an embedded shortwave trough crossing the Southeast, in addition to multiple clipper-type troughs over the Upper Midwest. The potential for isolated thunderstorms will exist across the far southern Florida Peninsula and near the Keys to the south of a cold front, somewhat enhanced by diurnal heating and a moist pre-frontal air mass with lower 70s F surface dewpoints. However, most of the thunderstorm potential should focus offshore, and that will particularly be the case by late today as low-level winds veer and the front progresses offshore.
