Severe Weather Threat Day 1 Sun Sep 8

Northern Plains...

Early Evening Water Vapor Imagery Reflects An Eastward-Moving Closed Low Over Western Mt...With Leading Height Falls And Strengthening Southwesterly Flow Aloft Overspreading The Northern High Plains/Dakotas. For One...Relatively Isolated Tstms Capable Of
Hail/Wind May Remain Possible This Evening Across Eastern Mt Into
Western Nd...Although A Cooling Boundary Layer Should Gradually
Temper The Vigor Of Storms In These Areas.

Farther East-Southeast...A Relatively More Certain/Sustained Severe
Weather Risk Will Likely Exist Tonight From Far Northeast Wy Into
Western/Northern Portions Of Sd And Far Southern Nd. Storm Mergers Appear To Be Leading To Upscale Quasi-Linear Development Early This Evening Near The Wy And Sd Border /As Of 01z/. A Nocturnally Increasing/Veering Low Level Jet Should Lead To Increasing Storm Coverage The Remainder Of The Night Including Possible Mcs Sustenance Across Aforementioned Portions Of Sd/Nd And Eventually Mn. Damaging Winds/Severe Hail Will Remain A Possibility Tonight...Although Existing Cloud Cover/Boundary Layer Cinh Could Somewhat Temper The Damaging Wind Risk Even As A
Semi-Organized/Sustained Mcs Otherwise Potentially Evolves.

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