National Weather Service United States Department of Commerce

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: Thu, Aug 13, 2026 at 6:18:52 pm CDT

With widespread afternoon heat index values from 105 to 110 (locally higher) degrees and overnight low temperatures from the mid 70s to the lower 80s expected to continue through the remainder of the week, a Heat Advisory is now in effect areawide through Sunday. Take appropriate precautions to prevent heat illness. The advisory may need to be extended beyond Sunday in future issuances.
Hot weather with little heat relief overnight persists through this weekend and into next week. Dangerous heat index values are forecast and heat stress will impact outdoor activities.
Tulsa and Fort Smith are both in the midst of a multi-day stretch featuring triple digit high temperatures with many more forecast. How does the current stretch of 100's stack up all-time?
Hot temperatures continue through the weekend with little chance for rainfall.
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