URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 472 NWS Storm Prediction Center Norman OK 640 PM CDT Sat Aug 29 2020 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Western Arkansas Southeast Oklahoma Far Northeast Texas * Effective this Saturday night and Sunday morning from 640 PM until 100 AM CDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Scattered large hail events to 1.5 inches in diameter possible SUMMARY...Locally intense thunderstorm development is expected especially near a front and outflow boundary this evening across the region, with very strong instability favorable for at least isolated severe thunderstorms. One or more semi-organized southeastward-moving clusters could ultimately evolve later this evening, mainly near/east of the Oklahoma/Arkansas border. The severe thunderstorm watch area is approximately along and 75 statute miles north and south of a line from 40 miles west southwest of Mcalester OK to 70 miles northeast of Texarkana AR. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). 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 469...WW 470...WW 471... 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 600. Mean storm motion vector 32020. ...GuyerRead more
from SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0472.html
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