Winter Returns Across the Northern Tier; Record Warmth for the Southwest

A large high pressure system will usher in cold air for this first day of March across the northern Plains, Great Lakes, Northeast and mid-Atlantic. Some wintry precipitation may evolve across the mid-Mississippi Valley, Ohio Valley and mid-Atlantic through Monday. Meanwhile, record warmth will spread across the Southwest, southern Plains through early this week. Read More >

Current conditions at

CASTLE ROCK (TR950)

Lat: 46.27139°NLon: 122.89194°WElev: 213.0ft.

NA

40°F

4°C

Humidity 100%
Wind Speed NNE 4 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Wind Chill37°F (3°C)
Last update 01 Mar 07:09 AM PST
Extended Forecast for

11 Miles NW Mount St Helens WA

  • Today

    Today: Partly sunny, with a high near 49. South wind 3 to 6 mph.

    High: 49 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 36. East wind 3 to 5 mph.

    Low: 36 °F

    Decreasing
    Clouds

  • Monday

    Monday: A 20 percent chance of rain after 10am.  Areas of frost before 8am. Snow level 4200 feet rising to 4900 feet in the afternoon.  Otherwise, mostly sunny, with a high near 47. Calm wind becoming west around 6 mph in the afternoon.

    High: 47 °F

    Slight Chance
    Rain

  • Monday Night

    Monday Night: Rain likely, mainly after 4am.  Snow level 5100 feet. Mostly cloudy, with a low around 39. Southwest wind 5 to 7 mph becoming south southeast after midnight.  Chance of precipitation is 60%.

    Low: 39 °F

    Chance Rain
    then Rain
    Likely

  • Tuesday

    Tuesday: Rain.  Snow level 5100 feet. High near 41. South southwest wind 8 to 10 mph, with gusts as high as 18 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 41 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain.  Snow level 4800 feet. Low around 37. Chance of precipitation is 100%.

    Low: 37 °F

    Rain

  • Wednesday

    Wednesday: Rain and snow.  Snow level 3900 feet. High near 38. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 38 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain and snow, becoming all snow after 7pm.  Cloudy, with a low around 34.

    Low: 34 °F

    Rain/Snow
    then Snow

  • Thursday

    Thursday: Snow.  Cloudy, with a high near 37.

    High: 37 °F

    Snow

Detailed Forecast

Today
Partly sunny, with a high near 49. South wind 3 to 6 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 36. East wind 3 to 5 mph.
Monday
A 20 percent chance of rain after 10am. Areas of frost before 8am. Snow level 4200 feet rising to 4900 feet in the afternoon. Otherwise, mostly sunny, with a high near 47. Calm wind becoming west around 6 mph in the afternoon.
Monday Night
Rain likely, mainly after 4am. Snow level 5100 feet. Mostly cloudy, with a low around 39. Southwest wind 5 to 7 mph becoming south southeast after midnight. Chance of precipitation is 60%.
Tuesday
Rain. Snow level 5100 feet. High near 41. South southwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain. Snow level 4800 feet. Low around 37. Chance of precipitation is 100%.
Wednesday
Rain and snow. Snow level 3900 feet. High near 38. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Wednesday Night
Rain and snow, becoming all snow after 7pm. Cloudy, with a low around 34.
Thursday
Snow. Cloudy, with a high near 37.
Thursday Night
Snow. Snow level 3700 feet. Cloudy, with a low around 35.
Friday
Rain and snow. Snow level 4000 feet. Cloudy, with a high near 38.
Friday Night
Rain and snow. Snow level 4900 feet. Mostly cloudy, with a low around 36.
Saturday
Rain. Snow level 5700 feet. Cloudy, with a high near 41.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles NW Mount St Helens WA
 46.31°N 122.34°W (Elev. 3691 ft)
7:41 am PST Mar 1, 2026
8am PST Mar 1, 2026-6pm PST Mar 7, 2026
 
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Additional Resources

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