Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0654 PM CST Sun Jan 18 2026 Valid 190100Z - 191200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not forecast across the U.S. this evening and tonight. ...DISCUSSION... A large-scale upper-level trough will move across the east-central U.S. tonight, as a cyclonic flow pattern remains in place over much of nation. At the surface, a large area of high pressure will be located over the Great Plains and Southeast. This dry and cold airmass will make conditions unfavorable for thunderstorms today and tonight across the continental U.S. ..Broyles.. 01/19/2026Read more