SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1131 PM CST Mon Nov 03 2025 Valid 041200Z - 051200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few lightning flashes may accompany low-topped storms along the California and Oregon coastlines early Wednesday morning. Organized severe storms are not expected. ...Synopsis... A mid-level trough will progress eastward over the Great Lakes as a second upper trough impinges on the West Coast today. A surface low will become established over the OH Valley while high pressure remains in place across the Southeast and much of the Interior West. A cool and/or stable low-level airmass will overspread most of the U.S., limiting thunderstorm development. The one exception may be portions of the northern CA/OR coasts. Toward the end of the period (06-12Z Wednesday morning), cooler temperatures aloft will gradually overspread the shoreline with the approach of the aforementioned upper trough. Buoyancy (however scant), may be sufficient to support a few lightning flashes with the stronger, low-topped convective cells that manage to develop. ..Squitieri/Wendt.. 11/04/2025
