Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

Strong thunderstorms with damaging winds and heavy rain are expected across portions of the Southeast. Thunderstorms may produce large hail across portions of Montana. Heavy rainfall could produce flash flooding across Iowa and vulnerable areas in Utah. Lowell will bring heavy rain, dangerous swells and rip currents to portions of Hawaii. Sweltering heat persists across the South-Central US. Read More >

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Last Map Update: Sun, Sep 6, 2026 at 4:50:34 pm CDT

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National Weather Service Little Rock, AR

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Heat Headlines Sunday

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Hot Weather Continue This Week

Severe Thunderstorm Outlook Sunday

Thunderstorm Chances Sunday & Monday

Forecast Summary

Fort Smith Radar

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.

The heat continues into Labor Day with afternoon heat indices between 105 and 109 expected. A heat advisory is in effect from noon to 7 PM Monday 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 strong to isolated downburst winds will be the main threat.

Headline-worthy heat persists through midweek, with some relief expected late week. Rain/storm chances today and Monday as well as late in the week. through the upcoming week.

KSRX Radar (Fort Smith, AR).

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Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

NWS Forecast Office Tulsa, OK