Record Heat for the Intermountain West and Northern Plains; Heavy Rainfall and Severe Weather Threats

Record setting heat is expected over the next several days from the Intermountain West through the northern Plains. Furthermore, fire weather concerns increase with dry and breezy conditions. Meanwhile, heavy rainfall and severe thunderstorm threats for the Ohio/Tennessee Valleys, central Appalachians and Southeast today. The threat shifts to central Gulf Coast and across central Texas this week. Read More >

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Last Map Update: Mon, Jul 20, 2026 at 5:24:38 am CDT

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National Weather Service Little Rock, AR

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Heat Advisory Today

Dangerous Heat Today & Tuesday

Storm Chances Today

Extreme Heat Watch Tuesday

Heat Index Forecast

Forecast Summary

Another hot and humid day is expected today, with widespread heat index values from 105 to 110 in the afternoon. A Heat Advisory is in effect from 1 pm to 8 pm for all eastern Oklahoma and west central Arkansas. Continue to exercise good heat safety to avoid heat illness.

Heat will intensify today and especially on Tuesday as upper level high pressure strengthens. Afternoon heat indices of 105-110 F, locally higher will occur today. Even hotter heat indices will occur on Tuesday, with afternoon values reaching between 105-115 F, locally higher. Heat precautions should be taken for any extended time outdoors.

A few isolated showers and thunderstorm may develop in the higher terrain areas of northwest AR by mid-afternoon. Brief heavy downpours, non-severe gusty winds, and cloud-to-ground lightning will be the main hazards. Chances quickly diminish after sunset.

Tuesday is forecast to be the hottest day of the week, with widespread afternoon high temperatures ranging from 95-105F. Heat indices will climb between 105-113F during peak heating hours. Highest values will occur across portions of NE OK and the Arkansas River Valley. An Extreme Heat Watch has issued from 12PM-8PM Tuesday, where the highest heat index values are expected.

Heat is expected to intensify the next few days. Afternoon heat indices of 100-110 F, locally higher through Tuesday, are expected. Heat precautions should still be taken for any extended time outdoors.

Hot and humid conditions will continue early this week, with isolated shower and thunderstorm potential again on Monday in higher terrain areas. The peak in the heat remains likely to occur on Tuesday.

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Record Heat for the Intermountain West and Northern Plains; Heavy Rainfall and Severe Weather Threats

NWS Forecast Office Tulsa, OK