Severe Weather Threat Day 3 Sun Aug 25

Seasonal Late August Weather Is Expected Across Much Of The Conus During The Day3 Period.

Upper High Is Expected To Gradually Become More Dominant As It Expands Across The Mid Ms Valley/Cntrl Plains.

The Primary Corridor For Significant Short-Waves Will Extend Across
The Pacific Nw/Nrn Rockies...Across Srn Canada Into New England.

Otherwise Weak Tropical Disturbances Will Advance Wwd Along The Gulf Coast Which Should Encourage Convection Across This Region.

Upper Ms Valley/Upper Great Lakes...

Short-Wave Trough Is Expected To Eject Newd Across The Nrn High
Plains Of Mt/Nd Into Srn Mb/Wrn Ontario By 26/00z.

This Feature Will Then Top The Cntrl U.S. Ridge And Dig Sewd Across Ontario Clipping The Nrn Great Lakes Region. While Llj Should Prove Responsible For Early Morning Convection Across Portions Of The Upper Ms Valley/Upper Great Lakes...This Activity Is Not Expected To Prove Particularly Strong...Though Marginally Severe Hail/Wind Could Accompany Robust Elevated Tstms As They Spread/Develop Into Ontario.

With Neutral/Weak Height Rises Expected During The Day It Appears
Much Of The Convection May Stay Focused Just North Of The Border.
However...Veered Low Level Flow Across The Nrn Plains Is Expected To Result In Intense Heating Along Ne-Sw Oriented Boundary Across Mn Which May Encourage A Few Storms To Develop Across The Warm Sector.

Otherwise...Convection May Organize Ahead Of Short-Wave Trough Over Wrn Ontario Which Could Spread Sewd Across The Arrowhead /Lake Superior During The Evening Hours. Hail/Wind Would Be The Primary Severe Threats If This Scenario Unfolds.

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