Weather across America

(NATIONAL) Excessive rainfall and severe thunderstorms possible across the northern tier, the west cools down as the Great Plains into the Midwest warms up, and critical fire weather conditions will persist across the Great Basin. 

Scattered showers and thunderstorms are expected to focus around a pair of surface fronts over parts of the Pacific Northwest and Northern Plains before expanding into the Upper Midwest, Great Lakes and Northeast through Monday night. 

Within this convection some of the storms will turn severe, particularly for portions of the Northern/Central Plains and from the Upper Mississippi Valley, Great Lakes, Ohio Valley and the Mid-Atlantic region. An enhanced risk of severe thunderstorms was issued by the Storm Prediction Center for parts of central-southern Montana and western North Dakota where the greatest threat of damaging winds are likely to be. 

Pockets of heavy rainfall and isolated areas of flash flooding will also be possible across the northern tier. A strong cold front will usher in substantial cooling along the West Coast and points inland Sunday and continuing into Monday before weakening by midweek. Persistent dry conditions across much of the Great Basin will contribute to maintaining Critical Fire weather risk. 

Elsewhere, upper-level ridging will build over the central part of the country beginning Sunday, which will lead to anomalous warmth for parts of the Great Plains and Midwest through midweek.