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

Heavy Rainfall in the Southwest and Southeast This Weekend; Monitoring Tropical Cyclone Formation Which Could Impact the Southeast U.S.

Heavy rainfall from monsoon thunderstorms may bring isolated flash and urban flooding to the Desert Southwest. A near-stationary front will bring numerous showers and thunderstorms to much of the Mid-Atlantic and Southeast. Tropical wave (AL94) is likely to become a depression. Significant uncertainty remains in the track and intensity, but chances for impacts to the Southeast are increasing. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

Lat: 43.06219°NLon: 108.44701°WElev: 5443.0ft.

Clear

77°F

25°C

Humidity 20%
Wind Speed S 10 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 26 Sep 05:30 PM MDT
Extended Forecast for

Arapahoe WY

  • Tonight

    Tonight: Patchy smoke after 11pm. Mostly clear, with a low around 42. North wind 3 to 8 mph.

    Low: 42 °F

    Patchy Smoke

  • Saturday

    Saturday: Patchy smoke before 1pm. Sunny, with a high near 79. Calm wind becoming northeast around 6 mph.

    High: 79 °F

    Patchy Smoke

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 47. East southeast wind around 6 mph becoming west northwest in the evening.

    Low: 47 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 81. South wind 5 to 10 mph.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 48. South southwest wind 6 to 10 mph.

    Low: 48 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 78. South southwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 50. South southwest wind 8 to 10 mph.

    Low: 50 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 47. Chance of precipitation is 20%.

    Low: 47 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

Detailed Forecast

Tonight
Patchy smoke after 11pm. Mostly clear, with a low around 42. North wind 3 to 8 mph.
Saturday
Patchy smoke before 1pm. Sunny, with a high near 79. Calm wind becoming northeast around 6 mph.
Saturday Night
Mostly clear, with a low around 47. East southeast wind around 6 mph becoming west northwest in the evening.
Sunday
Mostly sunny, with a high near 81. South wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 48. South southwest wind 6 to 10 mph.
Monday
Sunny, with a high near 78. South southwest wind 6 to 11 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 50. South southwest wind 8 to 10 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 47. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Partly cloudy, with a low around 41.
Friday
Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Arapahoe WY
 42.97°N 108.46°W (Elev. 4993 ft)
Last Update:
3:32 pm MDT Sep 26, 2025
Forecast Valid:
5pm MDT Sep 26, 2025-6pm MDT Oct 3, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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