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Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

Lat: 44.977222°NLon: 110.695278°WElev: 6138.0ft.

NA

40°F

4°C

Humidity 65%
Wind Speed WSW 4 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Wind Chill37°F (3°C)
Last update 18 Jun 05:15 AM MDT
Extended Forecast for

Mount Holmes WY

  • Today

    Today: Sunny, with a high near 58. Breezy, with a light northwest wind becoming west 15 to 20 mph in the morning. Winds could gust as high as 31 mph.

    High: 58 °F

    Sunny then
    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 37. Breezy, with a west wind 13 to 18 mph becoming north northeast 6 to 11 mph after midnight. Winds could gust as high as 30 mph.

    Low: 37 °F

    Mostly Clear
    and Breezy
    then Partly
    Cloudy

  • Juneteenth

    Juneteenth: Mostly cloudy, then gradually becoming sunny, with a high near 63. Northeast wind 6 to 14 mph becoming southwest in the morning. Winds could gust as high as 24 mph.

    High: 63 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Increasing clouds, with a low around 44. West southwest wind 8 to 14 mph becoming east southeast in the evening. Winds could gust as high as 23 mph.

    Low: 44 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers and possibly a thunderstorm after noon. High near 53. South wind 7 to 10 mph becoming west in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 53 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before midnight. Low around 39. West wind 5 to 8 mph. Chance of precipitation is 80%.

    Low: 39 °F

    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly after noon. Mostly sunny, with a high near 54. West wind 5 to 10 mph, with gusts as high as 22 mph.

    High: 54 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 35.

    Low: 35 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 58. Breezy, with a light northwest wind becoming west 15 to 20 mph in the morning. Winds could gust as high as 31 mph.
Tonight
Mostly clear, with a low around 37. Breezy, with a west wind 13 to 18 mph becoming north northeast 6 to 11 mph after midnight. Winds could gust as high as 30 mph.
Juneteenth
Mostly cloudy, then gradually becoming sunny, with a high near 63. Northeast wind 6 to 14 mph becoming southwest in the morning. Winds could gust as high as 24 mph.
Friday Night
Increasing clouds, with a low around 44. West southwest wind 8 to 14 mph becoming east southeast in the evening. Winds could gust as high as 23 mph.
Saturday
A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers and possibly a thunderstorm after noon. High near 53. South wind 7 to 10 mph becoming west in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm before midnight. Low around 39. West wind 5 to 8 mph. Chance of precipitation is 80%.
Sunday
A 40 percent chance of showers and thunderstorms, mainly after noon. Mostly sunny, with a high near 54. West wind 5 to 10 mph, with gusts as high as 22 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 35.
Monday
A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 55.
Monday Night
Mostly clear, with a low around 35.
Tuesday
Sunny, with a high near 61.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Holmes WY
 44.82°N 110.85°W (Elev. 9199 ft)
Last Update:
6:01 am MDT Jun 18, 2026
Forecast Valid:
6am MDT Jun 18, 2026-6pm MDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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