Lala Impacting Hawaii; Severe Thunderstorm and Flash Flooding Risks; Excessive Heat

Areas of gusty winds, heavy rain leading to flash flooding, and high surf continue across portions of Hawaii as Tropical Storm Lala continues to move away from the islands. Severe thunderstorm, heavy rainfall, and flash flooding threats continue from the Midwest to the Mid-Atlantic and across the central High Plains. Record heat continues for areas of the central/southern Plain into the Southeast Read More >

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Last Map Update: Tue, Aug 18, 2026 at 10:44:33 am CDT

Watches, Warnings & Advisories

National Weather Service Wichita, Kansas

National Weather Service Springfield, MO

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National Weather Service Little Rock, AR

National Weather Service Fort Worth/Dallas, TX

Extreme Heat Warning

Heat Advisory

Hazardous Weather Outlook

Heat Headlines Tue into Wed

Dangerous Heat Persists Through Midweek

100 Degree-Day Streak Info

Severe Weather Outlook Wednesday

Forecast Summary

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.

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

Isolated to scattered thunderstorms are expected to develop by late afternoon or early evening Wednesday across far northeast Oklahoma and far northwest Arkansas. Locally strong to severe downburst winds and large hail up to half-dollar size will be the main threats 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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Lala Impacting Hawaii; Severe Thunderstorm and Flash Flooding Risks; Excessive Heat

NWS Forecast Office Tulsa, OK