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Lowell to Impact Hawaii; Heat Persists in the South-Central U.S.

Hurricane Lowell is forecast to pass west of Kauai`s coastal waters tonight. Impacts such as high surf and heavy rain could impact all of the islands. Sweltering heat remains across the South-Central Plains and Lower/Middle Mississippi Valley into this week with limited nighttime relief. Periods of moderate to heavy rainfall will be possible through Tuesday morning in the northern Rockies. Read More >

Click a location below for detailed forecast.

Last Map Update: Tue, Sep 8, 2026 at 12:40:38 pm CDT

An Extreme Heat Warning is in effect from noon to 8PM Tuesday for parts of eastern Oklahoma into the Arkansas River Valley of western Arkansas for heat index values in excess of 110 degrees. A Heat Advisory is in effect for the rest of the forecast area. Expect peak heat index values up to 109 within the advisory area. Continue to take heat safety precautions.
Dangerous heat index values will continue through mid week before a minor cool down for late week.
Isolated thunderstorms are forecast Tuesday afternoon but chances increase along a slow moving front late Wednesday into Wednesday night. Gusty downburst winds and cloud-to-ground lightning will be the main threats.
Hot weather continues through mid week with increasing rain chances and slightly cooler weather by late week.
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