Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Mostly Cloudy

47°F

8°C

Humidity 96%
Wind Speed N 0 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 09 Dec 11:15 PM PST
Extended Forecast for

4 Miles NE Prosser WA

Wind Advisory December 10, 06:00am until December 11, 07:00am
Click here for hazard details and duration
Wind Advisory
  • Tonight

    Tonight: Rain likely before 1am, then a slight chance of rain after 4am.  Mostly cloudy, with a temperature rising to around 52 by 5am. South wind 5 to 9 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 47 °F

    Rain Likely

  • Wednesday

    Wednesday: A 20 percent chance of rain before 10am.  Partly sunny, with a high near 63. Breezy, with a southwest wind 23 to 26 mph, with gusts as high as 47 mph.

    High: 63 °F

    Breezy.
    Slight Chance
    Rain then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain, mainly after 4am.  Mostly cloudy, with a low around 52. Breezy, with a southwest wind around 23 mph, with gusts as high as 37 mph.

    Low: 52 °F

    Chance Rain
    and Breezy

  • Thursday

    Thursday: A 30 percent chance of rain before 10am.  Mostly cloudy, with a high near 62. Southwest wind 15 to 20 mph, with gusts as high as 25 mph.

    High: 62 °F

    Chance Rain
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 45. Southwest wind around 6 mph.

    Low: 45 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 61.

    High: 61 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain likely before 1am, then a slight chance of rain after 4am. Mostly cloudy, with a temperature rising to around 52 by 5am. South wind 5 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A 20 percent chance of rain before 10am. Partly sunny, with a high near 63. Breezy, with a southwest wind 23 to 26 mph, with gusts as high as 47 mph.
Wednesday Night
A 30 percent chance of rain, mainly after 4am. Mostly cloudy, with a low around 52. Breezy, with a southwest wind around 23 mph, with gusts as high as 37 mph.
Thursday
A 30 percent chance of rain before 10am. Mostly cloudy, with a high near 62. Southwest wind 15 to 20 mph, with gusts as high as 25 mph.
Thursday Night
Mostly cloudy, with a low around 45. Southwest wind around 6 mph.
Friday
Mostly cloudy, with a high near 61.
Friday Night
Mostly cloudy, with a low around 41.
Saturday
Partly sunny, with a high near 55.
Saturday Night
Mostly cloudy, with a low around 39.
Sunday
Partly sunny, with a high near 54.
Sunday Night
A slight chance of rain. Mostly cloudy, with a low around 38.
Monday
Rain likely. Mostly cloudy, with a high near 52.
Monday Night
Rain likely. Mostly cloudy, with a low around 39.
Tuesday
A chance of rain. Mostly sunny, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NE Prosser WA
 46.23°N 119.7°W (Elev. 650 ft)
10:45 pm PST Dec 9, 2025
11pm PST Dec 9, 2025-6pm PST Dec 16, 2025
 
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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