Subj : DAY3SVR: Nws Storm Prediction Center Norman Ok To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Fri Jun 30 2023 07:31:45 ACUS03 KWNS 300731 SWODY3 SPC AC 300730 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0230 AM CDT Fri Jun 30 2023 Valid 021200Z - 031200Z ....THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE OHIO AND TENNESSEE VALLEY AREA...AND INTO THE MID-ATLANTIC REGION... ....SUMMARY... Severe thunderstorms are forecast across the Ohio and Tennessee Valleys, eastward into the Mid-Atlantic region, where locally damaging winds and hail will accompany stronger storms. ....Ohio and Tennessee Valleys east to the Mid-Atlantic region... Continued eastward progression of a mid-level trough across the Ohio Valley and into the Northeast is expected Sunday, while a rather ill-defined surface baroclinic zone shifts slowly across this region. A moist/destabilizing airmass along and south of the surface front will contribute to development of afternoon storms, some of which will become severe. Storms may organize locally into fast-moving clusters, accompanied by damaging winds, in light of a belt of strong westerly flow through the lower and middle troposphere that is progged to reside atop the region. Storms will likely continue after dark, spreading eastward toward/into the Mid-Atlantic region, along with some ongoing severe weather. ....Colorado Front Range to the southern High Plains... Isolated storms are forecast across parts of the central and southern High Plains, initially over the higher terrain, as afternoon heating results in modest destabilization. Moderate flow aloft will contribute to ample shear to support a few stronger storms, accompanied by some risk for locally strong/severe wind gusts. ....Portions of the Dakotas and northwestern Minnesota westward to southern Montana/northern Wyoming... A cold front is progged to shift southeastward out of Canada into the north-central U.S. Sunday, ahead of an eastward-moving upper cyclone crossing the Canadian Prairie. Afternoon heating in the vicinity of this boundary over the northern Plains, and westward into the High Plains, will result in ample destabilization to support isolated storm development. While stronger flow aloft will remain to the cool side of the front, shear will be sufficient to allow a couple of the stronger storms to evolve, along with attendant risks for gusty/damaging winds and marginal hail. ...Goss.. 06/30/2023 $$ = = = To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. --- SBBSecho 3.14-Linux * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105) .