***Unseasonably cool over the Upper Midwest and Great Lakes***
***Scattered showers and thunderstorms for the East Coast***
***Stormy weather for the Central Plains and parts of the Rockies***
With the large scale upper level trough over the Eastern United States,
there definitely has been a break in the heat in recent days.
This is forecast to continue through the next two days, and this especially holds true for the Great Lakes region and into the Upper Midwest where a big upper level low resides. Periods of showers and perhaps a few rumbles of thunder are possible in this area, along with mostly cloudy skies and highs in the 60 to lows 70s.
Farther east along the East Coast, a slow moving cold front will allow for the development of more showers and storms from the Southeast to New England. Some areas may see slow moving thunderstorm activity, which could lead to some localized flooding issues. Temperatures will be close to normal, with a return to cooler weather by the time Monday arrives.
Elsewhere, numerous showers and storms are likely over parts of Kansas, Oklahoma, and Nebraska as a result of a stationary frontal boundary in that region along with shortwave energy aloft. This will also be the area with the best chance of severe thunderstorms.
Over the Central and Southern Rockies, diurnally driven thunderstorms can be expected with moisture from the monsoon.
For the Pacific Northwest, a cold front moving southward will bring drier and cooler conditions for this weekend.