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Heavy Rain and Flash Flooding in the West; Heat Expands in the Central U.S.

Monsoonal moisture will produce showers and thunderstorms with heavy rain over parts of the Southwest, Great Basin, and Central Rockies through Monday. Flash flooding is possible, especially in and around burn scars and in areas of steep terrain. Heat will persist across the Central U.S. early this week, spreading into the Ohio Valley and Mid-Atlantic later this week. Read More >

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Last Map Update: Sun, Sep 6, 2026 at 9:46:38 am CDT

A heat advisory is in effect for eastern Oklahoma and western Arkansas, running from noon to 7 pm Sunday. The lower Arkansas River Valley in west central Arkansas will experience the most extreme heat Sunday and an Extreme Heat Warning has been issued from noon to 7 pm Sunday. Expect heat index values as high as 112F during the afternoon.
Heat stress will likely impact daytime outdoor activities through the week. Drink plenty of water and take breaks in shade when spending time outdoors.
Widely scattered thunderstorms are expected Sunday afternoon through early evening. A few storms may produce locally damaging downburst winds.
Scattered thunderstorms are forecast Sunday afternoon with lesser coverage expected Monday. Gusty downburst winds will be the main threat.
An extended period of hot weather is likely to persist through at least the first part of September. The ongoing drought situation will worsen. Any rain chances remain low through the upcoming week.
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