Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Mondell Field (KECS)

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

Fair

37°F

3°C

Humidity 56%
Wind Speed NW 5 mph
Barometer 30.07 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 7 Dec 3:15 pm MST
Extended Forecast for

Newcastle WY

  • Tonight

    Tonight: Increasing clouds, with a low around 22. North wind around 5 mph becoming calm  in the evening.

    Low: 22 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 42. Wind chill values as low as 20. Northwest wind 5 to 11 mph, with gusts as high as 22 mph.

    High: 42 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 27. North wind 6 to 13 mph becoming south in the evening.

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain after 11am, mixing with snow after 4pm.  Mostly cloudy, with a high near 49. Breezy, with a west wind 15 to 20 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 38 mph.  Chance of precipitation is 30%.

    High: 49 °F

    Breezy.
    Chance Rain
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow.  Mostly cloudy, with a low around 25. Blustery, with a northwest wind 18 to 23 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 34 mph.

    Low: 25 °F

    Chance Snow
    and Blustery

  • Wednesday

    Wednesday: Snow likely before noon, then rain and snow likely between noon and 3pm, then rain likely after 3pm.  Mostly cloudy, with a high near 39. South wind 8 to 16 mph, with gusts as high as 22 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Snow Likely
    then
    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: Rain likely before midnight, then a chance of rain and snow between midnight and 3am, then a chance of snow after 3am.  Mostly cloudy, with a low around 23. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%.

    Low: 23 °F

    Rain Likely
    then Chance
    Rain/Snow

  • Thursday

    Thursday: A chance of snow.  Partly sunny, with a high near 31. Northwest wind 11 to 13 mph, with gusts as high as 22 mph.

    High: 31 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A chance of snow.  Mostly cloudy, with a low around 9.

    Low: 9 °F

    Chance Snow

Detailed Forecast

Tonight
Increasing clouds, with a low around 22. North wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 42. Wind chill values as low as 20. Northwest wind 5 to 11 mph, with gusts as high as 22 mph.
Monday Night
Mostly cloudy, with a low around 27. North wind 6 to 13 mph becoming south in the evening.
Tuesday
A chance of rain after 11am, mixing with snow after 4pm. Mostly cloudy, with a high near 49. Breezy, with a west wind 15 to 20 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 30%.
Tuesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 25. Blustery, with a northwest wind 18 to 23 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 34 mph.
Wednesday
Snow likely before noon, then rain and snow likely between noon and 3pm, then rain likely after 3pm. Mostly cloudy, with a high near 39. South wind 8 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday Night
Rain likely before midnight, then a chance of rain and snow between midnight and 3am, then a chance of snow after 3am. Mostly cloudy, with a low around 23. Northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Thursday
A chance of snow. Partly sunny, with a high near 31. Northwest wind 11 to 13 mph, with gusts as high as 22 mph.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 9.
Friday
A chance of snow, mainly before 11am. Mostly cloudy, with a high near 21.
Friday Night
A slight chance of snow. Mostly cloudy, with a low around 10.
Saturday
Partly sunny, with a high near 35.
Saturday Night
Partly cloudy, with a low around 17.
Sunday
Mostly sunny, with a high near 42.
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WY
 43.86°N 104.21°W (Elev. 4380 ft)
3:12 pm MST Dec 7, 2025
3pm MST Dec 7, 2025-6pm MST Dec 14, 2025
 
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Additional Resources

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