Severe Weather Threat Day 2 Sun Jun 9

While Ridging Aloft Prevails Across Most Of The Ern And Wrn States ...A Trough Moving Across The Upper Midwest Is Forecast To Drive Fairly Widespread Convective Activity Across The Ern Half Of The U.S. This Period. An Upper Low Off The Ca Coast Is Also Forecast To Move Newd/Onshore During The Period.

At The Surface...A Low Associated With The Midwest Upper System Will Shift Ewd Out Of Ia And Into The Wrn Upper Great Lakes Through The Period.

Mid Ms/Lower Oh Valley Vicinity...

The Upper Trough Moving Across The Upper Midwest And Associated/Weak Cool Front Trailing Swwd Across The Lower Mo Valley Region From An Ia Vicinity Parent Low Should Support Bands Of Showers And Thunderstorms Which Should Expand In Coverage Through The Afternoon And Evening Hours.

While Stronger Flow Aloft Should Remain To The Cool Side Of The Front -- Around The Western Fringe Of The Trough...Shear Supportive Of At Least Multicell Storms Will Exist Across The Lower Mo/Mid Ms/Lower Oh Valleys -- Which Is Suggestive Of Some Severe Potential Given The Moist/Destabilizing Afternoon Airmass.

Threat For Locally Damaging Winds And Hail Is Apparent Across The Mo/Il Vicinity During The Afternoon...And Shifting A Bit Ewd Into The Evening Hours Before The Threat Diurnally Diminishes.

The Southeast...

While The Main Upper Trough Moves Across The Upper Midwest ...Models Depict Smaller-Scale Cyclonic Disturbances Aloft Progressing Newd Across The Sern U.S. On The Srn Fringe Of Broader Cyclonic Flow Associated With The Midwestern System.

With A Moist/Destabilizing Afternoon Airmass...Expect Ascent Associated With These Upper Features To Support Development Of Several Bands Of Newd-Moving Thunderstorms During The Afternoon. While Not Particularly Strong...Slightly Enhanced Swlys Aloft May Support Some Organization Within A Few Clusters Of Convection -- And Thus Some Threat For Locally Gusty/Damaging Winds And Possibly Marginal Hail.

Thus...Will Introduce 5%/See Text Forecast Across The Southeast U.S. This Forecast.

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