SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0954 AM CST Thu Nov 06 2025 Valid 061630Z - 071200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast through tonight across the contiguous United States. ...Synopsis... A low-amplitude, progressive flow regime will characterize the upper pattern today across the Lower 48 states. A mid-level trough featuring a few vorticity maxima will consolidate and amplify as this trough moves across the northern Great Plains into the Upper Midwest by early Friday morning. In the low levels, a cyclone will deepen during the period and move across the ND/MN vicinity to the Upper Peninsula of MI. A strengthening warm conveyor will probably result in isolated thunderstorm activity tonight across the mid MS Valley into the southern Great Lakes before a cold front sweeps east. Elsewhere, intermittent showers and isolated thunderstorms will accompany a potent 500-mb speed max forecast to move east from the eastern Pacific into the Pacific Northwest. A low-latitude disturbance is forecast to eject across the southern Gulf of America toward south Florida late in the period. This feature should encourage a weak surface trough to focus near the south Florida Atlantic Coast. Scattered convection is expected to develop near/east of this boundary during the overnight hours. ..Smith/Thornton.. 11/06/2025
