Dangerous, Record-Breaking Heat to Continue in the Central and Eastern U.S.; Severe Thunderstorms in the Upper Midwest; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will continue across most of the central and eastern U.S this week. Heat indices will exceed 100 degrees. Severe storms will be possible from the northern Plains into the Midwest and Great Lakes regions, as well as across the southern Appalachians Thursday, with the primary threat large to very large hail. Critical fire weather to continue in the Four Corners Region Read More >

Hazardous Weather Conditions

Current conditions at

Fort Smith Regional Airport (KFSM)

Lat: 35.33°NLon: 94.37°WElev: 436ft.

Fair

77°F

25°C

Humidity 88%
Wind Speed SE 5 mph
Barometer 30.02 in (1016.1 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 2 Jul 5:53 am CDT
Extended Forecast for

Mountainburg AR

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 88. East wind around 5 mph becoming south in the afternoon.

    High: 88 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 70. Southeast wind around 5 mph.

    Low: 70 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm.  Increasing clouds, with a high near 87. South wind around 5 mph.

    High: 87 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 70. South wind around 5 mph becoming calm  in the evening.

    Low: 70 °F

    Partly Cloudy

  • Independence Day

    Independence Day: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 87. East wind around 5 mph becoming south in the afternoon.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm.

    Low: 70 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 1pm.  Mostly sunny, with a high near 88. Calm wind.

    High: 88 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 72. Southeast wind around 5 mph becoming calm.

    Low: 72 °F

    Partly Cloudy

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. East wind around 5 mph becoming south in the afternoon.
Tonight
Partly cloudy, with a low around 70. Southeast wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 87. South wind around 5 mph.
Friday Night
Partly cloudy, with a low around 70. South wind around 5 mph becoming calm in the evening.
Independence Day
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. East wind around 5 mph becoming south in the afternoon.
Saturday Night
Partly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 88. Calm wind.
Sunday Night
Partly cloudy, with a low around 72. Southeast wind around 5 mph becoming calm.
Monday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. Calm wind.
Tuesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. Calm wind becoming southwest around 5 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 72. South wind around 5 mph becoming calm.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. Calm wind becoming southwest around 5 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainburg AR
 35.63°N 94.14°W
5:50 am CDT Jul 2, 2026
6am CDT Jul 2, 2026-6pm CDT Jul 8, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database