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

Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Current conditions at

Mondell Field (KECS)

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

Overcast

52°F

11°C

Humidity 54%
Wind Speed NW 7 mph
Barometer 29.82 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 11 Oct 5:15 am MDT
Extended Forecast for

Newcastle WY

  • Today

    Today: A 20 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 68. Calm wind becoming southeast 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 68 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 47. Southeast wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Low: 47 °F

    Showers
    Likely then
    Chance
    Showers

  • Columbus Day

    Columbus Day: Mostly cloudy, then gradually becoming sunny, with a high near 55. South wind 7 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 55 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 42. Northwest wind 8 to 13 mph becoming light and variable in the evening.

    Low: 42 °F

    Chance Rain

  • Tuesday

    Tuesday: A 40 percent chance of rain. Partly sunny, with a high near 57. South wind 3 to 5 mph.

    High: 57 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 43. Light and variable wind.

    Low: 43 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain likely. Mostly cloudy, with a high near 54. Chance of precipitation is 70%.

    High: 54 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Rain Likely

  • Thursday

    Thursday: A slight chance of rain before noon. Partly sunny, with a high near 54. Breezy.

    High: 54 °F

    Slight Chance
    Rain then
    Mostly Sunny
    and Breezy

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 68. Calm wind becoming southeast 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Tonight
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 47. Southeast wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Columbus Day
Mostly cloudy, then gradually becoming sunny, with a high near 55. South wind 7 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 42. Northwest wind 8 to 13 mph becoming light and variable in the evening.
Tuesday
A 40 percent chance of rain. Partly sunny, with a high near 57. South wind 3 to 5 mph.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 43. Light and variable wind.
Wednesday
Rain likely. Mostly cloudy, with a high near 54. Chance of precipitation is 70%.
Wednesday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 40.
Thursday
A slight chance of rain before noon. Partly sunny, with a high near 54. Breezy.
Thursday Night
Partly cloudy, with a low around 34. Breezy.
Friday
Sunny, with a high near 53.
Friday Night
Mostly clear, with a low around 36.
Saturday
Sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WY
 43.86°N 104.21°W (Elev. 4380 ft)
Last Update:
5:21 am MDT Oct 11, 2026
Forecast Valid:
5am MDT Oct 11, 2026-6pm MDT Oct 17, 2026
 
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