National Weather Service United States Department of Commerce

Heat Across the Center of the Nation; Severe Thunderstorms Across the Great Lakes and Ohio Valley

Heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest into Monday. Fire weather concerns continue for portions of the Intermountain West. Active monsoonal moisture fuels thunderstorms over the Southwest with possible flash flooding. Tropical cyclone Fausto in the Pacific, should weaken as it approaches Hawaii; Dangerous surf, swells and rip currents are expected. Read More >

Click a location below for detailed forecast.

Last Map Update: Tue, Jul 21, 2026 at 10:12:26 am CDT

The heat and humidity continue Tuesday across eastern Oklahoma and western Arkansas. An Extreme Heat Warning and Heat Advisory have been issued for eastern Oklahoma and northwest Arkansas. Heat index values as high as 115 are expected in the warning area and 110 in the advisory area. Practice good heat safety to avoid heat illness.
Dangerous heat continues areawide Tuesday, and for portions of the area through Friday. Heat index values of 105 to 115 degrees are expected Tuesday, then slightly cooler conditions will develop.
During Extreme Heat: Find air conditioning. Avoid strenuous activities. Wear light clothing. Check on family members and neighbors. Drink plenty of water. Watch for heat cramps, exhaustion, and stroke. Never leave people or pets in a closed car.
Low shower and thunderstorm chances exist this afternoon into tonight, mainly across parts of northeast Oklahoma and northwest Arkansas. Severe weather is not expected, but gusty winds and moderate rain may accompany the strongest storms.
Widespread oppressive heat continues this week. Anticipate Heat Advisories and Extreme Heat Warnings almost daily.
Latest Text Product Selector (Selected product opens in a new window)

Decision Support Winter Hazards Observations Climate Hydrology
 
 
Social Media Satellite Fire Weather Weather Radio Spotter Training Text Products
 
 
Models