Remnants of Arthur and Heavy Rainfall Across the South; Fire Weather Threat in the West

Life-threatening, potentially catastrophic flash flooding expected along the central Gulf Coast as the remnants of Arthur track across the area. Isolated brief tornadoes and damaging gusts remain possible overnight in the Southeast. Isolated to scattered dry thunderstorms may cause lightning-ignited fires and erratic behavior due to gusty winds across parts of the West Friday. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

51°F

11°C

Humidity 59%
Wind Speed N 4 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 19 Jun 01:15 AM MDT
Extended Forecast for

17 Miles SE Big Sky MT

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. Northeast wind 3 to 5 mph.

    Low: 39 °F

    Mostly Cloudy

  • Juneteenth

    Juneteenth: Partly sunny, with a high near 65. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 65 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46. Northeast wind 5 to 7 mph becoming calm  in the evening.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm.  High near 61. Calm wind becoming west southwest around 6 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: 61 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before midnight.  Low around 44. Northwest wind around 6 mph becoming light and variable  after midnight.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 44 °F

    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm after noon.  Mostly sunny, with a high near 59. West wind 3 to 8 mph.  Chance of precipitation is 60%.

    High: 59 °F

    Mostly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 40. North northwest wind 3 to 7 mph.

    Low: 40 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 10 percent chance of showers and thunderstorms after noon.  Sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. Northeast wind 3 to 5 mph.
Juneteenth
Partly sunny, with a high near 65. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 46. Northeast wind 5 to 7 mph becoming calm in the evening.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 61. Calm wind becoming west southwest around 6 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 before midnight. Low around 44. Northwest wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 59. West wind 3 to 8 mph. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 40. North northwest wind 3 to 7 mph.
Monday
A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 58.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 69.
Wednesday Night
Partly cloudy, with a low around 45.
Thursday
A slight chance of showers and thunderstorms. Sunny, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles SE Big Sky MT
 45.1°N 111.08°W (Elev. 8550 ft)
1:32 am MDT Jun 19, 2026
2am MDT Jun 19, 2026-6pm MDT Jun 25, 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