SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1236 AM CDT Tue Oct 20 2020 Valid 201200Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe storms are not expected across the continental United States Tuesday and Tuesday night. ...Synopsis... A belt of stronger and broadly cyclonic mid-level flow will remain across the northern CONUS on Tuesday as a pronounced shortwave trough within the flow moves across the northern Plains/upper Midwest. A surface cold front will move east across portions of the northeast states and Ohio Valley while the western extension of the front lifts northward as a warm front across the southern Plains. Widely scattered to scattered thunderstorms will develop near the front Tuesday, aided by frontal convergence in the presence of weak/isolated pockets of moderate surface-based buoyancy. The stronger deep-layer shear will remain north of the more substantial instability, and as a result severe storms are not expected. Scattered thunderstorms will be possible Tuesday across FL and coastal sections of the southeast states in the vicinity of a mid-level disturbance and weakening coastal front. Weak vertical wind shear will limit intensity, however gusty winds will be possible with the stronger storms. ..Bunting/Lyons.. 10/20/2020
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