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Above Average Temperatures for the West and Central Plains; Lake Effect Snow Continues

Well above average temperatures will prevail across the Plains and the West Coast this week, while a cold front will bring Arctic air to the South and East Coast Thursday and Friday. Lake effect snow is forecast downwind of the Great Lakes through Thursday along and behind the Arctic front, as well as mountain snow across the Southern Appalachians. Read More >

Hazardous Weather Conditions

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

41°F

5°C

Humidity 90%
Wind Speed NE 3 MPH
Barometer 30.44 in (1030.82 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 13 Jan 06:35 PM PST
Extended Forecast for

Prosser WA

Air Stagnation Advisory January 13, 06:50pm until January 16, 10:00am
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory January 13, 06:50pm until January 16, 10:00am

    NOW until 10:00am Fri

    Air Stagnation Advisory

  • Tonight

    Low: 34 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy dense fog before 1pm. Otherwise, mostly sunny, with a high near 47. Calm wind.

    High: 47 °F

    Patchy Dense
    Fog

  • Wednesday Night

    Wednesday Night: Patchy fog after 7pm. Otherwise, partly cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 44. Calm wind.

    High: 44 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog. Patchy freezing fog after 1am. Otherwise, partly cloudy, with a low around 29. Calm wind.

    Low: 29 °F

    Patchy
    Freezing Fog
    and Patchy
    Fog

  • Friday

    Friday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 43.

    High: 43 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Patchy fog. Otherwise, partly cloudy, with a low around 27.

    Low: 27 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 41.

    High: 41 °F

    Patchy Fog
    then Mostly
    Sunny

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 34. Calm wind.
Wednesday
Patchy dense fog before 1pm. Otherwise, mostly sunny, with a high near 47. Calm wind.
Wednesday Night
Patchy fog after 7pm. Otherwise, partly cloudy, with a low around 32. Calm wind.
Thursday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 44. Calm wind.
Thursday Night
Patchy fog. Patchy freezing fog after 1am. Otherwise, partly cloudy, with a low around 29. Calm wind.
Friday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 43.
Friday Night
Patchy fog. Otherwise, partly cloudy, with a low around 27.
Saturday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 41.
Saturday Night
Partly cloudy, with a low around 26.
Sunday
Mostly sunny, with a high near 41.
Sunday Night
Partly cloudy, with a low around 26.
M.L.King Day
Partly sunny, with a high near 41.
Monday Night
Mostly cloudy, with a low around 27.
Tuesday
Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.22°N 119.79°W (Elev. 715 ft)
Last Update:
5:15 pm PST Jan 13, 2026
Forecast Valid:
6pm PST Jan 13, 2026-6pm PST Jan 20, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation