Weather across America

(NATIONAL) Monsoonal moisture continues an excessive rain threat across much of the Southwest into the Rockies, heavy to locally excessive rain also likely across parts of south Texas, the Plains, and Mississippi Valley, and anomalous heat continues across the central/southern Plains with heat also building across the interior West. 

An active monsoon pattern will continue across the Southwest and into the central Great Basin and Rockies the next few days combined with additional enhancement provided by a couple of weaker upper-level impulses. This results in mainly diurnally driven showers and thunderstorms, with locally

heavy rain potential. Weather Prediction Center continues to highlight this potential on the Excessive Rainfall Outlook through Tuesday. 

Soils in some of the region are overly saturated so its these areas, along with burn scars and urban communities, that will be most vulnerable to flash flooding and/or debris flows. Monsoonal moisture rounding an upper ridge stuck over the southern U.S. may also spread moderate to locally heavy rainfall from the northern/central Plains into the middle Mississippi Valley along a quasi-stationary frontal boundary. 

An area of low pressure across far southern Texas Sunday afternoon will continue to tap deep tropical moisture to fuel rain and thunderstorms across south Texas. The heavy to excessive rainfall threat should wane by Sunday night across southern Texas but may continue into Monday for far west

and southwest Texas as the remnant low moves into northern Mexico. 

Elsewhere, a weak low and associated front through the central Appalachians and southern Mid-Atlantic will bring a period of moderate to locally heavy rain through Monday. A weakening front into northern Florida will also bring some showers and locally heavy rainfall to southern Florida into Monday.

A heat dome parked over the south-central U.S. continued to keep temperatures well above seasonal normal across much of the Plains this weekend. The most anomalous heat should present over the central into the southern Plains where daytime highs Monday and Tuesday in the upper 90s to

near 100 (or just above) are expected. Heat will also build across much of the interior intermountain West this coming week, with excessive heat watches in effect for the central valley of California where daytime highs could exceed 100 degrees several days in a row.