Weather across America
(NATIONAL) A slight risk of severe thunderstorms across the Upper Mississippi Valley, showers and thunderstorms likely across the Midwest and the Gulf Coast, and a warming trend begins for the Northwest and the Ohio Valley/Northeast.
An amplifying ridge over southern Canada will influence showers and thunderstorm activity in the Midwest over the next few days. A surface wave moving across the Upper Midwest will continue to be the focus for potentially severe thunderstorms into Sunday evening in Minnesota and southeastern Wisconsin/northern Illinois where slight risks of severe thunderstorms are in effect.
Otherwise, showers and thunderstorms are expected to form along a cold front moving from the Upper Midwest Sunday night into the Ohio Valley on Monday and the Northeast by Tuesday. Isolated heavy rainfall over parts of the Ohio Valley may lead to localized flash flooding.
Elsewhere, shortwave energy propagating through the Texas coast will support increased moisture flux into the region on Monday, leading to the potential for heavy rainfall and localized flash flooding concerns, particularly along the northern Texas coast.
Continued troughing and southerly flow across Florida will contribute to continued showers and thunderstorm activity over the next few days, with heavy rain potential across western portions of the state. An upstream ridge over the West will amplify over the coming days, leading to a warming trend across the Northwest. Highs in the 90s may tie or break records over parts of the Pacific Northwest on Tuesday as the ridge expands over the region.
The amplifying trough in the East will pull warm moist air into the Ohio Valley, Appalachians and Northeast/Mid-Atlantic on Monday leading to highs in the upper 80s to low 90s. Widespread low temperature records may be broken Monday night from the Ohio Valley to the interior Northeast with temperatures in the upper 60s to mid-70s.
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