Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

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Last Map Update: Sun, Aug 16, 2026 at 12:20:50 pm CDT

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Forecast Summary

Heat index values from 110 to 115 are expected Sunday afternoon across most of northeast Oklahoma, as well as the I-40 corridor in east central Oklahoma and west central Arkansas. Outside of these areas, heat index values from 105 t o 110 should be common. Take appropriate heat precautions to prevent heat illness.

Hot weather with little heat relief overnight persists this weekend and into next week, despite the weak front in the area Sunday and Monday. Dangerous heat index values are forecast and heat stress will impact outdoor activities.

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?

Isolated to scattered thunderstorms are expected as a weak front drops southward into eastern Oklahoma and western Arkansas Sunday afternoon into Monday. Locally strong to severe downburst winds will be the main threat with storms that develop. The rainfall is unlikely to slow recent drought trends. Keep an eye on the weather if you have outdoor plans during this time.

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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Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

NWS Forecast Office Tulsa, OK