...Severe weather likely across the Midwest and into the Mid-Atlantic...
...Showers and storms across the Northwest eventually moving into the northern Plains...
A potentially significant severe weather and flash flooding event is
beginning to unfold uncross the Midwest this afternoon.
Energy ejecting out of the northern Plains will continue to amplify through the Great Lakes tonight and into Thursday. This will act to intensify a surface low pressure system as it moves rapidly eastward across the Ohio Valley overnight tonight and into the Mid-Atlantic region by Thursday afternoon.
An organized and widespread area of convection is expected to develop ahead and north of the frontal boundaries beginning this evening across the Ohio Valley and eventually moving through the Mid-Atlantic region on Thursday.
These storms could have the potential to produce all types of
severe weather... flash flooding, damaging winds, large hail, and possibly tornadoes. For the latest updates regarding the severe weather, monitor the Storm Prediction Center website. The entire system is expected to move off the Delmarva coast on Thursday night with cooler and drier air filling in behind it.
Elsewhere, an upper trough and its associated surface system will bring an increase in rain and thunderstorm activity across the Pacific Northwest and northern Rockies throughout the remainder of the work week. As the surface frontal system moves east across the Rockies on Thursday, light showers and thunderstorms will begin to pop up across the northern Plains by early Friday morning.
South of this... an upper level ridge should remain in place and keep temperatures very warm and above normal for this time of the year across parts of the central and southern Plains states.
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