Weather across America

(NATIONAL) A Slight Risk of excessive rainfall over parts of the Southern High Plains, and temperatures 15 to 25 degrees below average over New England.

Weak upper-level energy over the Great Basin and extending into the Central Plains will slowly retreat northward to the Northern Rockies by Tuesday morning. However, the upper-level energy will draw moisture northward over the Southern Plains producing showers and thunderstorms and creating heavy rain over parts of the Texas Panhandle. Therefore, the WPC has issued a Slight Risk of excessive rainfall over parts of the Southern High Plains on Sunday into Monday morning. 

The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. The threat of excessive rainfall continues over the region from Monday into Tuesday morning. 

Showers and thunderstorms will develop over parts of the Central Rockies into the Northern Intermountain Region on Sunday and Monday. In addition, moisture trapped under the upper-level ridge and weak upper-level impulses over the Upper Midwest will produce scattered showers and thunderstorms over the area through Tuesday. 

Meanwhile, by Tuesday, an upper-level low over New England moves slowly northeastward into Southeastern Canada. The upper-level low will create temperatures that will be 15 to 25 degrees below average over the region. In addition, the system produces scatted areas of rain and drizzle through Tuesday. 

Weak impulses and moisture will aid in creating showers and thunderstorms over parts of the Central Appalachians, Ohio, and Tennessee Valleys on Sunday. The region of showers and thunderstorms move to the Central Gulf Coast on Monday. 

Elsewhere, tropical moisture over Florida will create showers and thunderstorms over the state through Sunday evening.