Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Buffalo - Johnson County Airport (KBYG)

Lat: 44.38122°NLon: 106.71947°WElev: 4925.0ft.

Overcast

52°F

11°C

Humidity 87%
Wind Speed NW 6 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 19 Sep 09:50 PM MDT
Extended Forecast for

21 Miles SW Buffalo WY

Flood Watch September 19, 10:11pm until September 20, 06:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch September 19, 10:11pm until September 20, 06:00pm

    NOW until 6:00pm Sun

    Flood Watch

  • Tonight

    Low: 41 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers and thunderstorms likely before 4pm, then showers and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm.  High near 48. West northwest wind 3 to 6 mph.  Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 48 °F

    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms, mainly before 8pm.  Mostly cloudy, with a low around 37. Calm wind becoming west northwest around 5 mph after midnight.

    Low: 37 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: A 10 percent chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 57. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 57 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. Light and variable wind becoming west 5 to 7 mph after midnight.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 65. West northwest wind 5 to 10 mph becoming south southwest in the morning.

    High: 65 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight.  Partly cloudy, with a low around 45. West wind around 7 mph.

    Low: 45 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after noon.  Partly sunny, with a high near 64. Chance of precipitation is 30%.

    High: 64 °F

    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers likely after 3am. Mostly cloudy, with a low around 41. Calm wind becoming northwest around 5 mph after midnight. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and thunderstorms likely before 4pm, then showers and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 48. West northwest wind 3 to 6 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A 40 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 37. Calm wind becoming west northwest around 5 mph after midnight.
Monday
A 10 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 57. Calm wind becoming south 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 39. Light and variable wind becoming west 5 to 7 mph after midnight.
Tuesday
Sunny, with a high near 65. West northwest wind 5 to 10 mph becoming south southwest in the morning.
Tuesday Night
A 20 percent chance of showers after midnight. Partly cloudy, with a low around 45. West wind around 7 mph.
Wednesday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 64. Chance of precipitation is 30%.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 47.
Friday
Mostly sunny, with a high near 68.
Friday Night
Partly cloudy, with a low around 47.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 66.
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ABOUT THIS FORECAST

 
Point Forecast:
21 Miles SW Buffalo WY
 44.09°N 106.96°W (Elev. 7999 ft)
9:17 pm MDT Sep 19, 2026
10pm MDT Sep 19, 2026-6pm MDT Sep 26, 2026
 
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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