WW 659 SEVERE TSTM ID MT 292055Z – 300300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 659 NWS Storm Prediction Center Norman OK 255 PM MDT Tue Aug 29 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Idaho Southwest Montana * Effective this Tuesday afternoon and evening from 255 PM until 900 PM MDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1 inch in diameter possible SUMMARY...Scattered thunderstorms will form and spread northeastward across northeast Idaho and southwest Montana through late evening. Storm clusters and short line segments will be capable of producing damaging outflow gusts of 60-70 mph and isolated large hail up to 1 inch in diameter. The severe thunderstorm watch area is approximately along and 75 statute miles east and west of a line from 55 miles west northwest of Drummond MT to 45 miles southeast of Salmon ID. 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. && AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 24025. ...Thompson
