Severe Thunderstorms in the Northern Plains and Upper Midwest; Critical Fire Weather in the West; Dangerous Heat in the Central and Eastern U.S.

Severe thunderstorms are likely today across the northern Plains and into the upper Mississippi Valley. Gusty winds and dry conditions will result in widespread critical fire weather through Saturday across parts of the Four Corners region and the Great Basin. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Read More >

Current conditions at

Mondell Field (KECS)

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

Fair

61°F

16°C

Humidity 52%
Wind Speed Calm
Barometer 29.53 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 21 Jun 12:55 am MDT
Extended Forecast for

Newcastle WY

  • Overnight

    Overnight: Clear, with a low around 63. East wind around 5 mph.

    Low: 63 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 87. Southeast wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58. South wind 10 to 15 mph becoming northeast after midnight. Winds could gust as high as 20 mph.

    Low: 58 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 11am.  Sunny, with a high near 80. Northeast wind 10 to 15 mph becoming west in the morning. Winds could gust as high as 25 mph.

    High: 80 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers before midnight.  Partly cloudy, with a low around 45. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 45 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 72. North wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 15 mph.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 54. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 54 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 75. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 75 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers.  Mostly cloudy, with a low around 54.

    Low: 54 °F

    Showers
    Likely

Detailed Forecast

Overnight
Clear, with a low around 63. East wind around 5 mph.
Saturday
Sunny, with a high near 87. Southeast wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 58. South wind 10 to 15 mph becoming northeast after midnight. Winds could gust as high as 20 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 11am. Sunny, with a high near 80. Northeast wind 10 to 15 mph becoming west in the morning. Winds could gust as high as 25 mph.
Sunday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 45. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 72. North wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 15 mph.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 54. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 54.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 72.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 52.
Thursday
Sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 57.
Friday
Sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WY
 43.86°N 104.21°W (Elev. 4380 ft)
1:09 am MDT Jun 21, 2025
1am MDT Jun 21, 2025-6pm MDT Jun 27, 2025
 
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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