WW 679 SEVERE TSTM NE SD WY 100000Z – 100600Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 679 NWS Storm Prediction Center Norman OK 600 PM MDT Sat Sep 9 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of The northwest Nebraska Panhandle Extreme southwest South Dakota Eastern Wyoming * Effective this Saturday night from 600 PM until Midnight MDT. * Primary threats include... Isolated damaging wind gusts to 70 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Scattered supercells are expected to form in eastern Wyoming this evening with an attendant threat for occasional large hail up to 1.5 to 1.75 inches in diameter. Some upscale growth into a cluster will also be possible by early tonight, with some increase in the potential for severe outflow gusts of 60-70 mph. The severe thunderstorm watch area is approximately along and 55 statute miles north and south of a line from 60 miles northwest of Douglas WY to 20 miles southeast of Chadron NE. 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 676...WW 677...WW 678... 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 450. Mean storm motion vector 30020. ...Thompson
