SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0210 PM CDT Mon Sep 29 2025 Valid 011200Z - 021200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe storms are not forecast for Wednesday. ...Synopsis... A relatively inactive day in terms of thunderstorm potential will exist on Wednesday, with a large area of high pressure dropping south out of Quebec and toward the Mid Atlantic. This surface high will extend westward across the MS Valley and into the northern Gulf, where little instability or lift will be present to support thunderstorms. A weak surface trough will develop over the eastern Dakotas, in association with a midlevel disturbance. Ascent with this feature as well as cool temperatures aloft may combine with daytime heating to yield isolated afternoon thunderstorms, but severe weather is not expected due to weak instability. To the west, an upper trough will move slowly east across the Pacific Northwest, with a belt of strong midlevel southwesterlies moving toward the northern Rockies by Thursday morning. Minimal instability across coastal WA and OR may support low-topped convection, primarily near the coast and offshore. ..Jewell.. 09/29/2025
