Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

CASTLE ROCK (TR950)

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

NA

32°F

0°C

Humidity 100%
Wind Speed NNE 0 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 22 Mar 02:09 AM PDT
Extended Forecast for

11 Miles NW Mount St Helens WA

  • Overnight

    Overnight: Widespread frost.  Otherwise, mostly clear, with a low around 28. Light and variable wind becoming east northeast around 5 mph.

    Low: 28 °F

    Frost

  • Sunday

    Sunday: Mostly sunny, with a high near 43. Light and variable wind becoming north northwest 5 to 9 mph in the afternoon.

    High: 43 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 31. North northeast wind 5 to 8 mph.

    Low: 31 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 45. Light and variable wind becoming west northwest around 6 mph in the afternoon.

    High: 45 °F

    Partly Sunny

  • Monday Night

    Monday Night: Snow showers likely before 2am, then rain likely, possibly mixed with snow showers.  Snow level 3900 feet. Cloudy, with a low around 38. West northwest wind 5 to 9 mph becoming southeast in the evening.  Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 38 °F

    Snow Showers
    Likely then
    Rain/Snow
    Likely

  • Tuesday

    Tuesday: Rain, possibly mixed with snow, becoming all rain after 8am.  Snow level 5600 feet rising to 7000 feet. High near 41. Breezy.  Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 41 °F

    Breezy.
    Rain/Snow
    then Rain

  • Tuesday Night

    Tuesday Night: Snow, possibly mixed with rain, becoming all snow after 2am.  Snow level 6200 feet lowering to 3700 feet after midnight . Low around 32. Breezy.  Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Rain/Snow and
    Breezy

  • Wednesday

    Wednesday: Snow.  Cloudy, with a high near 38. Breezy.

    High: 38 °F

    Snow and
    Breezy

  • Wednesday Night

    Wednesday Night: Snow likely, mainly before 11pm.  Mostly cloudy, with a low around 29. Breezy.

    Low: 29 °F

    Snow Likely
    and Breezy

Detailed Forecast

Overnight
Widespread frost. Otherwise, mostly clear, with a low around 28. Light and variable wind becoming east northeast around 5 mph.
Sunday
Mostly sunny, with a high near 43. Light and variable wind becoming north northwest 5 to 9 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 31. North northeast wind 5 to 8 mph.
Monday
Partly sunny, with a high near 45. Light and variable wind becoming west northwest around 6 mph in the afternoon.
Monday Night
Snow showers likely before 2am, then rain likely, possibly mixed with snow showers. Snow level 3900 feet. Cloudy, with a low around 38. West northwest wind 5 to 9 mph becoming southeast in the evening. Chance of precipitation is 60%. Little or no snow accumulation expected.
Tuesday
Rain, possibly mixed with snow, becoming all rain after 8am. Snow level 5600 feet rising to 7000 feet. High near 41. Breezy. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tuesday Night
Snow, possibly mixed with rain, becoming all snow after 2am. Snow level 6200 feet lowering to 3700 feet after midnight . Low around 32. Breezy. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Wednesday
Snow. Cloudy, with a high near 38. Breezy.
Wednesday Night
Snow likely, mainly before 11pm. Mostly cloudy, with a low around 29. Breezy.
Thursday
A chance of snow. Partly sunny, with a high near 41.
Thursday Night
Mostly clear, with a low around 29.
Friday
Sunny, with a high near 50.
Friday Night
Partly cloudy, with a low around 34.
Saturday
A slight chance of rain. Snow level 4100 feet rising to 4700 feet in the afternoon. Mostly sunny, with a high near 51.
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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)
2:02 am PDT Mar 22, 2026
2am PDT Mar 22, 2026-6pm PDT Mar 28, 2026
 
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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