SPC AC 181913 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0213 PM CDT Tue Mar 18 2025 Valid 201200Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorm development will be possible on Thursday from parts of the Mid-Atlantic and northern Rockies. A severe threat is not expected. ...Synopsis... A progressive upper pattern will be in place over the CONUS on Thursday, with a mid-level trough impinging on the West Coast as another mid-level trough approaches the central Rockies and a third upper trough ejects into the Atlantic. Though the central U.S. trough will encourage strong lee troughing over the Plains, Gulf moisture will be scoured from the previous departing trough and associated surface cold front. Furthermore, surface high pressure will overspread much of the eastern and western CONUS. The net result will be widespread, stable conditions, with negligible thunderstorm potential over much of the U.S., with two exceptions. First, cold temperatures aloft and associated steep mid-level lapse rates accompanying the aforementioned Rockies upper trough will overspread portions of the northern Rockies, promoting enough lift and buoyancy (albeit scant) to support a couple of lightning flashes. Second, across the Mid Atlantic, just enough moisture to foster marginal buoyancy ahead of a surface trough/cold front will support isolated thunderstorm development before the cold front moves offshore. ..Squitieri.. 03/18/2025 CLICK TO GET WUUS03 PTSDY3 PRODUCT NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0730Z
Category: Watches, Warnings, Advisories, & Hazards