SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1112 PM CST Mon Nov 16 2020 Valid 171200Z - 181200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for severe thunderstorms appears negligible across most of the U.S. ...Synopsis... A mid-level trough across the East Coast and an upper ridge across the central CONUS will move eastward as surface high pressure and associated deep-layer subsidence dominates much of the central/eastern U.S. Broad cyclonic flow aloft will prevail along the West Coast, with multiple embedded mid-level impulses pivoting around the cyclonic upper flow. Deep-layer ascent atop modest low-level buoyancy provided by a moist marine layer will promote isolated thunderstorm development today through tonight. NAM, GFS and RAP Forecast soundings suggest convective parcels will be surface based, with up to 100-200 J/kg 0-3km CAPE possible along the northern California and Oregon coastline, and 500 meter winds reaching the 35-50 kt range. As such, a few of the stronger storms may promote efficient downward momentum transport of these stronger winds aloft to foster an occasional damaging gust or two. Otherwise, an isolated thunderstorm may occur during the day ahead of a southward sagging cold front across far southern Florida into the Florida Keys. ..Squitieri.. 11/17/2020
There’s more click here.