Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Siloam Springs, Smith Field Airport (KSLG)

Lat: 36.2°NLon: 94.48°WElev: 1194ft.

Fair

106°F

41°C

Humidity 22%
Wind Speed SW 15 G 22 mph
Barometer 29.85 in (1008.9 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index107°F (42°C)
Last update 19 Aug 4:56 pm CDT
Extended Forecast for

Leach OK

Heat Advisory August 19, 05:13pm until August 19, 09:00pm
Click here for hazard details and duration
...
  •  
    Heat Advisory August 19, 05:13pm until August 19, 09:00pm

    NOW until 9:00pm Wed

    Heat Advisory

  • Tonight

    Low: 74 °F

    Mostly Clear
    then Chance
    T-storms

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 96. Heat index values as high as 100. North wind 5 to 10 mph.

    High: 96 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 71. North wind around 5 mph becoming east after midnight.

    Low: 71 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 98. East wind around 5 mph.

    High: 98 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. East wind around 5 mph.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm.  Mostly sunny, with a high near 99. South wind around 5 mph.  Chance of precipitation is 20%.

    High: 99 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. East wind around 5 mph.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 98. South wind 5 to 10 mph.

    High: 98 °F

    Mostly Sunny

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly between 1am and 4am. Increasing clouds, with a low around 74. Northwest wind around 5 mph becoming east after midnight.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 96. Heat index values as high as 100. North wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 71. North wind around 5 mph becoming east after midnight.
Friday
Sunny, with a high near 98. East wind around 5 mph.
Friday Night
Mostly clear, with a low around 73. East wind around 5 mph.
Saturday
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm. Mostly sunny, with a high near 99. South wind around 5 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 74. East wind around 5 mph.
Sunday
Mostly sunny, with a high near 98. South wind 5 to 10 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. Southeast wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 99. South wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 75. South wind around 10 mph.
Tuesday
Mostly sunny, with a high near 99. Southwest wind around 10 mph.
Tuesday Night
Mostly clear, with a low around 75. East wind around 5 mph.
Wednesday
Mostly sunny, with a high near 98. East wind 5 to 10 mph becoming north in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Leach OK
 36.21°N 94.92°W
4:50 pm CDT Aug 19, 2026
5pm CDT Aug 19, 2026-6pm CDT Aug 26, 2026
 
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