Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Current conditions at

Buffalo - Johnson County Airport (KBYG)

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

Clear

54°F

12°C

Humidity 93%
Wind Speed W 3 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 18 Sep 02:20 AM MDT
Extended Forecast for

21 Miles SW Buffalo WY

Flood Watch September 18, 12:00pm until September 20, 06:00pm
Click here for hazard details and duration
Flood Watch
  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 51. West northwest wind 9 to 11 mph.

    Low: 51 °F

    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 67. West northwest wind 5 to 8 mph becoming light and variable.

    High: 67 °F

    Sunny then
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms before 4am, then a chance of showers and thunderstorms after 5am.  Patchy fog after midnight. Low around 45. South southeast wind 5 to 7 mph becoming calm  after midnight.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 45 °F

    Showers then
    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Showers and thunderstorms, mainly before 11am, then showers and possibly a thunderstorm after 5pm.  High near 57. Calm wind becoming south 5 to 7 mph in the morning.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 57 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm.  Low around 41. Northwest wind around 6 mph becoming light and variable.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 41 °F

    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 9am.  High near 50. West northwest wind around 6 mph.  Chance of precipitation is 100%.

    High: 50 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Mostly cloudy, with a low around 38. Northwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 50%.

    Low: 38 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 51. West northwest wind 9 to 11 mph.
Friday
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 67. West northwest wind 5 to 8 mph becoming light and variable.
Friday Night
Showers and thunderstorms before 4am, then a chance of showers and thunderstorms after 5am. Patchy fog after midnight. Low around 45. South southeast wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers and thunderstorms, mainly before 11am, then showers and possibly a thunderstorm after 5pm. High near 57. Calm wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm. Low around 41. Northwest wind around 6 mph becoming light and variable. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers, with thunderstorms also possible after 9am. High near 50. West northwest wind around 6 mph. Chance of precipitation is 100%.
Sunday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 38. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.
Monday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 64.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 44.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
21 Miles SW Buffalo WY
 44.09°N 106.96°W (Elev. 7999 ft)
12:47 am MDT Sep 18, 2026
2am MDT Sep 18, 2026-6pm MDT Sep 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database