SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0636 AM CST Tue Nov 04 2025 Valid 041300Z - 051200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few lightning flashes may accompany low-topped storms along the California and Oregon coasts early Wednesday morning. Organized severe storms are not expected. ...Discussion... A shortwave trough will amplify southeastward over the Canadian Prairies toward the upper Great Lakes tonight, while a more prominent upper trough and related frontal band approach the Pacific Northwest/northern California coasts late tonight and early Wednesday. A cool and/or stable low-level airmass will overspread most of the U.S., limiting thunderstorm development. An exception may be portions of the Oregon and northern California coasts. In relation to the approaching upper trough, cooler temperatures aloft will gradually overspread the coast, and scant buoyancy may be sufficient to support a few lightning flashes with low-topped thunderstorms near the coast early Wednesday. ..Guyer/Kerr.. 11/04/2025
