Dangerous Heat in the Central and Eastern U.S.; Critical Fire Weather in the Great Basin and Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue Tuesday across portions of the Four Corners and Great Basin, as dry conditions and gusty winds persist. Read More >

Hazardous Weather Conditions

Current conditions at

Fort Smith Regional Airport (KFSM)

Lat: 35.33°NLon: 94.37°WElev: 436ft.

Fair

85°F

29°C

Humidity 72%
Wind Speed Vrbl 5 mph
Barometer 29.96 in (1013.8 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 29 Jun 9:53 pm CDT
Extended Forecast for

Mountainburg AR

  • Tonight

    Tonight: Clear, with a low around 74. Southeast wind around 5 mph becoming calm  after midnight.

    Low: 74 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91. Light southeast wind becoming south 5 to 10 mph in the morning.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74. South wind around 5 mph becoming calm  in the evening.

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 91. Calm wind becoming south around 5 mph in the morning.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 74. Southeast wind around 5 mph becoming calm  in the evening.

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm.  Sunny, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.

    High: 90 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 74. Southeast wind around 5 mph becoming calm  in the evening.

    Low: 74 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.

    High: 91 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. Southeast wind around 5 mph becoming calm.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 74. Southeast wind around 5 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 91. Light southeast wind becoming south 5 to 10 mph in the morning.
Tuesday Night
Clear, with a low around 74. South wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 91. Calm wind becoming south around 5 mph in the morning.
Wednesday Night
Mostly clear, with a low around 74. Southeast wind around 5 mph becoming calm in the evening.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 74. Southeast wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 74. Southeast wind around 5 mph becoming calm.
Independence Day
Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 75. South wind around 5 mph becoming calm.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Calm wind becoming southwest around 5 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. Calm wind.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. Calm wind becoming south around 5 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainburg AR
 35.63°N 94.17°W
10:11 pm CDT Jun 29, 2026
10pm CDT Jun 29, 2026-6pm CDT Jul 6, 2026
 
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Additional Resources

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