WW 639 SEVERE TSTM MD OH PA WV 130005Z – 130600Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 639 NWS Storm Prediction Center Norman OK 805 PM EDT Sat Aug 12 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of The Maryland Panhandle Southeast Ohio Southwest and south central Pennsylvania Northern West Virginia * Effective this Saturday night and Sunday morning from 805 PM until 200 AM EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1.5 inches in diameter possible A tornado or two possible SUMMARY...Scattered supercells and storm clusters will persist through the early overnight hours as storms spread to the east and east-southeast. Damaging winds and large hail will be the main threats, though an isolated tornado or two could occur through about 9-10 pm EDT. The severe thunderstorm watch area is approximately along and 35 statute miles north and south of a line from 25 miles north of Parkersburg WV to 20 miles north of Hagerstown MD. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 634...WW 636...WW 637...WW 638... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 29030. ...Thompson
