SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0200 PM CDT Tue Sep 30 2025 Valid 021200Z - 031200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for severe thunderstorms appears negligible on Thursday. ...Synopsis... An upper trough will gradually amplify along the West Coast on Thursday, with increasing southwest winds aloft across the Great Basin and into the northern Rockies. Ahead of this trough, an upper ridge will exist from Mexico into the southern Plains, with a secondary high from the TN Valley across the Appalachians. At the surface, high pressure will dominate the pattern across the eastern states, the Gulf of America and into the Plains, with minimal instability forecast. Exceptions will be over the FL Peninsula in a moist easterly low-level flow regime, and over parts of ND and northern MN where southerly flow and moistening may allow for elevated instability to develop. In either case, severe storms are unlikely. Otherwise, lift with the western trough and midlevel moisture should result in precipitation and a few lightning flashes from central NV into southwest MT. ..Jewell.. 09/30/2025
