Storms and Heavy Rainfall in the Plains and Southern Appalachians; Hazardous Heat in the South and Southeast

Severe thunderstorms with heavy rainfall will be possible across the southern Appalachians through this evening. Thunderstorms are also expected from the northern/central Plains into portions of the Midwest through Tuesday, and severe storms may produce large hail and damaging wind gusts. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

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Last Map Update: Mon, Aug 17, 2026 at 5:06:38 pm CDT

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National Weather Service Little Rock, AR

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Extreme Heat Warning

Heat Advisory

Hazardous Weather Outlook

Heat Advisory Monday

Heat Headlines Tue into Wed

Dangerous Heat Persists Through Midweek

100 Degree-Day Streak Info

Severe Weather Outlook Monday

Forecast Summary

A Heat Advisory is in effect from 11 AM to 8 PM Monday for east-central and southeast OK as well as west-central AR. Heat indices between 105 and 110 degrees are expected. A front will take the edge off of the heat across NE OK and NW AR.

Dangerous heat will spread back into all of eastern Oklahoma and western Arkansas for Tuesday and Wednesday, with heat index values in excess of 110 expected across most of eastern Oklahoma and west central Arkansas both days. Little nighttime relief is expected either. Heat stress will remain high during this period.

High heat stress conditions will persist through the middle of the week. Heat stress will continue to impact outdoor activities. Some minor heat relief is forecast during the latter part of the week.

Tulsa, Fort Smith and Fayetteville are all in the midst of a multi-day stretch featuring triple digit high temperatures with more forecast. How does the current stretch of 100's stack up all-time? Fayetteville has officially cracked the Top 5 as of August 16th and Fort Smith is within striking distance.

Isolated thunderstorms are expected to develop this afternoon across southeast Oklahoma and into west central Arkansas. Locally strong to severe downburst winds will be the main threat with storms that develop.

Hot temperatures continue through the weekend with isolated to scattered thunderstorm potential late Sunday afternoon into Monday. Slightly cooler for some on Monday but back to the hot weather Tuesday.

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Storms and Heavy Rainfall in the Plains and Southern Appalachians; Hazardous Heat in the South and Southeast

NWS Forecast Office Tulsa, OK