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.

Overcast

48°F

9°C

Humidity 95%
Wind Speed E 3 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 09 Dec 07:35 PM PST
Extended Forecast for

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, mainly before 10pm.  Mostly cloudy, with a temperature falling to near 46 by 10pm, then rising to around 54 during the remainder of the night. Calm wind becoming south 5 to 7 mph in the evening.  Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Rain Likely

  • Wednesday

    Wednesday: A 20 percent chance of rain before 10am.  Mostly cloudy, with a high near 63. Breezy, with a southwest wind 18 to 23 mph, with gusts as high as 43 mph.

    High: 63 °F

    Slight Chance
    Rain then
    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain, mainly after 4am.  Mostly cloudy, with a low around 52. Southwest wind around 21 mph, with gusts as high as 32 mph.

    Low: 52 °F

    Chance Rain

  • Thursday

    Thursday: A 30 percent chance of rain before 10am.  Mostly cloudy, with a high near 62. Southwest wind 13 to 16 mph, with gusts as high as 22 mph.

    High: 62 °F

    Chance Rain
    then Mostly
    Cloudy

  • Thursday Night

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

    Low: 45 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 60.

    High: 60 °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 40.

    Low: 40 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain likely, mainly before 10pm. Mostly cloudy, with a temperature falling to near 46 by 10pm, then rising to around 54 during the remainder of the night. Calm wind becoming south 5 to 7 mph in the evening. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 63. Breezy, with a southwest wind 18 to 23 mph, with gusts as high as 43 mph.
Wednesday Night
A 30 percent chance of rain, mainly after 4am. Mostly cloudy, with a low around 52. Southwest wind around 21 mph, with gusts as high as 32 mph.
Thursday
A 30 percent chance of rain before 10am. Mostly cloudy, with a high near 62. Southwest wind 13 to 16 mph, with gusts as high as 22 mph.
Thursday Night
Mostly cloudy, with a low around 45. West wind around 6 mph.
Friday
Mostly cloudy, with a high near 60.
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 40.
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 55.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.22°N 119.79°W (Elev. 715 ft)
3:20 pm PST Dec 9, 2025
7pm 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