National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Hazardous Weather Conditions

Current conditions at

Fort Smith Regional Airport (KFSM)

Lat: 35.33°NLon: 94.37°WElev: 436ft.

Fair

88°F

31°C

Humidity 59%
Wind Speed SW 16 G 23 mph
Barometer 29.66 in (1003.6 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 17 Jun 12:53 pm CDT
Extended Forecast for

Fort Smith AR

  • This Afternoon

    This Afternoon: Sunny, with a high near 93. Heat index values as high as 100. South wind around 15 mph, with gusts as high as 25 mph.

    High: 93 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 75. South wind 5 to 10 mph becoming east after midnight.

    Low: 75 °F

    Mostly Clear

  • Thursday

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

    High: 90 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 72. Northeast wind 5 to 10 mph. Chance of precipitation is 80%.

    Low: 72 °F

    Chance
    T-storms then
    Showers

  • Juneteenth

    Juneteenth: A 40 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 87. East wind around 5 mph.

    High: 87 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. East wind around 5 mph.

    Low: 72 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Southeast wind around 5 mph. Chance of precipitation is 60%.

    High: 88 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. Southeast wind around 5 mph.

    Low: 75 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 92. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 92 °F

    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 93. Heat index values as high as 100. South wind around 15 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 75. South wind 5 to 10 mph becoming east after midnight.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 72. Northeast wind 5 to 10 mph. Chance of precipitation is 80%.
Juneteenth
A 40 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 87. East wind around 5 mph.
Friday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. East wind around 5 mph.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Southeast wind around 5 mph. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. Southeast wind around 5 mph.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 92. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Showers and possibly a thunderstorm. Low around 76. Southwest wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Monday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 88. South wind around 5 mph becoming north in the afternoon.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Northeast wind around 5 mph.
Tuesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 87. East wind around 5 mph becoming calm.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fort Smith AR
 35.38°N 94.39°W
Last Update:
12:50 pm CDT Jun 17, 2026
Forecast Valid:
12pm CDT Jun 17, 2026-6pm CDT Jun 23, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation