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
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