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

Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Current conditions at

Riverton Regional Airport (KRIW)

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

Clear

73°F

23°C

Humidity 25%
Wind Speed SSW 27 MPH
Barometer 29.72 in (1006.44 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 10 Oct 12:35 PM MDT
Extended Forecast for

Arapahoe WY

  • This Afternoon

    This Afternoon: A 20 percent chance of showers after 3pm. Partly sunny, with a high near 81. Breezy, with a south southwest wind 16 to 24 mph, with gusts as high as 38 mph.

    High: 81 °F

    Slight Chance
    Showers and
    Breezy

  • Tonight

    Tonight: A 30 percent chance of showers, mainly before 4am. Increasing clouds, with a low around 51. Breezy, with a south wind 10 to 16 mph, with gusts as high as 25 mph.

    Low: 51 °F

    Chance
    Showers and
    Breezy

  • Sunday

    Sunday: A chance of showers before noon, then showers likely and possibly a thunderstorm between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Cloudy, with a high near 63. Breezy, with a south wind 9 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    High: 63 °F

    Chance
    Showers then
    Showers
    Likely and
    Breezy

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 4am, then a chance of showers. Mostly cloudy, with a low around 42. Breezy, with a light and variable wind becoming west southwest 15 to 20 mph in the evening. Winds could gust as high as 31 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 42 °F

    Showers
    Likely then
    Chance
    Showers and
    Breezy

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 61. Breezy, with a west wind 10 to 16 mph becoming north in the afternoon. Winds could gust as high as 23 mph.

    High: 61 °F

    Mostly Sunny
    and Breezy
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Showers likely, mainly after midnight. Mostly cloudy, with a low around 37. North wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 60%.

    Low: 37 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 57. North northeast wind 3 to 7 mph. Chance of precipitation is 50%.

    High: 57 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 37. Chance of precipitation is 80%.

    Low: 37 °F

    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 54. Chance of precipitation is 60%.

    High: 54 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
A 20 percent chance of showers after 3pm. Partly sunny, with a high near 81. Breezy, with a south southwest wind 16 to 24 mph, with gusts as high as 38 mph.
Tonight
A 30 percent chance of showers, mainly before 4am. Increasing clouds, with a low around 51. Breezy, with a south wind 10 to 16 mph, with gusts as high as 25 mph.
Sunday
A chance of showers before noon, then showers likely and possibly a thunderstorm between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Cloudy, with a high near 63. Breezy, with a south wind 9 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Sunday Night
Showers and thunderstorms likely before 4am, then a chance of showers. Mostly cloudy, with a low around 42. Breezy, with a light and variable wind becoming west southwest 15 to 20 mph in the evening. Winds could gust as high as 31 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Columbus Day
Mostly sunny, with a high near 61. Breezy, with a west wind 10 to 16 mph becoming north in the afternoon. Winds could gust as high as 23 mph.
Monday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 37. North wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 60%.
Tuesday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 57. North northeast wind 3 to 7 mph. Chance of precipitation is 50%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 37. Chance of precipitation is 80%.
Wednesday
Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 54. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 35.
Thursday
A chance of showers. Mostly sunny, with a high near 58.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 33.
Friday
Sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Arapahoe WY
 42.97°N 108.49°W (Elev. 5036 ft)
Last Update:
12:31 pm MDT Oct 10, 2026
Forecast Valid:
12pm MDT Oct 10, 2026-6pm MDT Oct 16, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation