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

Heavy Rain in the Southern Appalachians; Fire Weather and Heat in the West; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding today. Gusty winds and low relative humidity will bring critical fire weather conditions to parts of the Great Basin and northern Rockies today and Thursday. Hot to extremely hot temperatures are in place through today across parts of the western U.S. Read More >

Hazardous Weather Conditions

Current conditions at

Mondell Field (KECS)

Lat: 43.89°NLon: 104.32°WElev: 4173ft.

Fair

70°F

21°C

Humidity 53%
Wind Speed Calm
Barometer 29.98 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 13 Aug 7:35 am MDT
Extended Forecast for

6 Miles N Newcastle WY

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 87. Southeast wind around 5 mph becoming northwest in the afternoon. Winds could gust as high as 15 mph.

    High: 87 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 62. North wind around 5 mph becoming east after midnight.

    Low: 62 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 87. Light and variable wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 62. North wind around 5 mph becoming east after midnight. Winds could gust as high as 15 mph.

    Low: 62 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 86. East wind around 5 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 86 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 63. East wind around 5 mph.

    Low: 63 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82. East wind 5 to 10 mph becoming south in the morning. Winds could gust as high as 15 mph.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 61. East wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 61 °F

    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 87. Southeast wind around 5 mph becoming northwest in the afternoon. Winds could gust as high as 15 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 62. North wind around 5 mph becoming east after midnight.
Thursday
Sunny, with a high near 87. Light and variable wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 62. North wind around 5 mph becoming east after midnight. Winds could gust as high as 15 mph.
Friday
Mostly sunny, with a high near 86. East wind around 5 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 63. East wind around 5 mph.
Saturday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82. East wind 5 to 10 mph becoming south in the morning. Winds could gust as high as 15 mph.
Saturday Night
A chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 61. East wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.
Sunday Night
A slight chance of showers and thunderstorms before midnight. Mostly clear, with a low around 61.
Monday
Sunny, with a high near 85.
Monday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 62.
Tuesday
Sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles N Newcastle WY
 43.94°N 104.22°W (Elev. 5292 ft)
Last Update:
6:49 am MDT Aug 13, 2025
Forecast Valid:
7am MDT Aug 13, 2025-6pm MDT Aug 19, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation