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

Dangerous Heat in the West; Coastal Flooding & High Rip Current Risk through the Weekend on the East Coast; Flash Flooding Concerns in the Southeast and Southwest

A dangerous, record heat wave continues across portions of the West through Tuesday. High rip current risk and dangerous surf continue through the weekend. There are flash flooding concerns through the weekend for portions of the Southeast and Southwest. Read More >

Hazardous Weather Conditions

Current conditions at

Mondell Field (KECS)

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

Overcast

55°F

13°C

Humidity 88%
Wind Speed S 3 mph
Barometer 30.40 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 23 Aug 6:55 am MDT
Extended Forecast for

Newcastle WY

  • Today

    Today: A 20 percent chance of showers and thunderstorms before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 72. Calm wind becoming south around 5 mph in the afternoon.

    High: 72 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 9pm and 3am. Partly cloudy, with a low around 53. South wind around 5 mph becoming northeast after midnight. Chance of precipitation is 20%.

    Low: 53 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 74. Calm wind becoming south around 5 mph in the afternoon.

    High: 74 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 51. East wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 51 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 75. South wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 75 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 53. East wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 53 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78. South wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 55. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 55 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms after noon. Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 72. Calm wind becoming south around 5 mph in the afternoon.
Tonight
A slight chance of showers and thunderstorms between 9pm and 3am. Partly cloudy, with a low around 53. South wind around 5 mph becoming northeast after midnight. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 74. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 51. East wind 5 to 10 mph, with gusts as high as 15 mph.
Monday
Mostly sunny, with a high near 75. South wind 5 to 10 mph, with gusts as high as 15 mph.
Monday Night
Partly cloudy, with a low around 53. East wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday
Mostly sunny, with a high near 78. South wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
Partly cloudy, with a low around 55. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
A slight chance of showers and thunderstorms after noon. Partly sunny, with a high near 80.
Wednesday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 56.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 77.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WY
 43.86°N 104.21°W (Elev. 4380 ft)
Last Update:
3:29 am MDT Aug 23, 2025
Forecast Valid:
7am MDT Aug 23, 2025-6pm MDT Aug 29, 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