Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Stillwater, Stillwater Regional Airport (KSWO)

Lat: 36.16°NLon: 97.09°WElev: 984ft.

Fair

78°F

26°C

Humidity 76%
Wind Speed SE 5 mph
Barometer 30.01 in (1014.9 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 17 Aug 7:53 am CDT
Extended Forecast for

5 Miles WNW Sumner OK

Heat Advisory August 17, 01:00pm until August 17, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Mostly sunny, with a high near 96. Heat index values as high as 105. South wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 96 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 75. South wind 6 to 13 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 98. Heat index values as high as 105. South wind 6 to 10 mph.

    High: 98 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. South southeast wind 5 to 9 mph becoming light south  after midnight.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm.  Mostly sunny and hot, with a high near 97. South southwest wind 3 to 6 mph.  Chance of precipitation is 20%.

    High: 97 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 94.

    High: 94 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 96. Heat index values as high as 105. South wind 8 to 14 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 75. South wind 6 to 13 mph, with gusts as high as 20 mph.
Monday
Sunny and hot, with a high near 98. Heat index values as high as 105. South wind 6 to 10 mph.
Monday Night
Mostly clear, with a low around 75. South southeast wind 5 to 9 mph becoming light south after midnight.
Tuesday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 97. South southwest wind 3 to 6 mph. Chance of precipitation is 20%.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Sunny, with a high near 91.
Thursday Night
Clear, with a low around 66.
Friday
Sunny, with a high near 91.
Friday Night
Clear, with a low around 67.
Saturday
Sunny, with a high near 91.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Sumner OK
 36.33°N 97.2°W
5:05 am CDT Aug 17, 2025
8am CDT Aug 17, 2025-6pm CDT Aug 23, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database