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

Storm Systems Continue to Impact the Pacific Northwest; Lake Effect Snow Continues

A second Pacific cold front will cross the Pacific Northwest Wednesday followed by another atmospheric river. Each of these features will bring additional periods of gusty winds, mountain snow, and heavy to excessive rainfall with renewed flooding. Heavy lake effect snow continues into Tuesday east of Lakes Erie and Ontario. Read More >

Hazardous Weather Conditions

Current conditions at

Sunnyside Municipal Airport (K1S5)

Lat: 46.3271°NLon: 119.9704°WElev: 768.0ft.

Clear

58°F

14°C

Humidity 52%
Wind Speed SW 12 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 15 Dec 07:35 PM PST
Extended Forecast for

5 Miles WNW Alderdale WA

High Wind Watch December 16, 10:00pm until December 17, 04:00pm
Click here for hazard details and duration
High Wind Watch

  • Tonight

    Tonight: A slight chance of rain before 10pm, then a slight chance of rain after 4am. Mostly cloudy, with a low around 43. Windy, with a southwest wind 25 to 30 mph decreasing to 13 to 18 mph after midnight. Winds could gust as high as 43 mph. Chance of precipitation is 20%.

    Low: 43 °F

    Slight Chance
    Rain and
    Windy

  • Tuesday

    Tuesday: A slight chance of rain before 10am, then a chance of rain after 4pm. Mostly sunny, with a high near 58. Southwest wind 13 to 20 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.

    High: 58 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain, mainly between 10pm and 4am. Low around 41. Windy, with a southwest wind 25 to 34 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 41 °F

    Rain and
    Windy

  • Wednesday

    Wednesday: A 40 percent chance of rain before 10am. Sunny, with a high near 49. Windy, with a west wind 29 to 31 mph, with gusts as high as 38 mph.

    High: 49 °F

    Windy. Chance
    Rain then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain, mainly after 4am. Low around 38. Southwest wind 10 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Chance Rain
    then Rain

  • Thursday

    Thursday: Rain. High near 50. Chance of precipitation is 100%.

    High: 50 °F

    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 40. Chance of precipitation is 80%.

    Low: 40 °F

    Rain

  • Friday

    Friday: Rain likely, mainly before 10am. Partly sunny, with a high near 47. Chance of precipitation is 60%.

    High: 47 °F

    Rain Likely

  • Friday Night

    Friday Night: A chance of rain before 4am, then a slight chance of rain and snow. Partly cloudy, with a low around 34. Chance of precipitation is 30%.

    Low: 34 °F

    Chance Rain
    then Slight
    Chance
    Rain/Snow

Detailed Forecast

Tonight
A slight chance of rain before 10pm, then a slight chance of rain after 4am. Mostly cloudy, with a low around 43. Windy, with a southwest wind 25 to 30 mph decreasing to 13 to 18 mph after midnight. Winds could gust as high as 43 mph. Chance of precipitation is 20%.
Tuesday
A slight chance of rain before 10am, then a chance of rain after 4pm. Mostly sunny, with a high near 58. Southwest wind 13 to 20 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Tuesday Night
Rain, mainly between 10pm and 4am. Low around 41. Windy, with a southwest wind 25 to 34 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A 40 percent chance of rain before 10am. Sunny, with a high near 49. Windy, with a west wind 29 to 31 mph, with gusts as high as 38 mph.
Wednesday Night
Rain, mainly after 4am. Low around 38. Southwest wind 10 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain. High near 50. Chance of precipitation is 100%.
Thursday Night
Rain. Low around 40. Chance of precipitation is 80%.
Friday
Rain likely, mainly before 10am. Partly sunny, with a high near 47. Chance of precipitation is 60%.
Friday Night
A chance of rain before 4am, then a slight chance of rain and snow. Partly cloudy, with a low around 34. Chance of precipitation is 30%.
Saturday
A slight chance of rain and snow before 10am, then a chance of rain. Mostly sunny, with a high near 45.
Saturday Night
A chance of rain and snow. Partly cloudy, with a low around 33.
Sunday
A chance of rain and snow. Partly sunny, with a high near 44.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 33.
Monday
A chance of rain and snow. Partly sunny, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Alderdale WA
 45.91°N 120.02°W (Elev. 902 ft)
Last Update:
3:20 pm PST Dec 15, 2025
Forecast Valid:
7pm PST Dec 15, 2025-6pm PST Dec 22, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation