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Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Mist

41°F

5°C

Humidity 99%
Wind Speed N 3 MPH
Barometer 30.26 in (1024.72 mb)
Dewpoint 41°F (5°C)
Visibility 2.50 mi
Last update 30 Jan 02:35 PM PST
Extended Forecast for

Prosser WA

  • This Afternoon

    This Afternoon: A 20 percent chance of rain. Cloudy, with a high near 48. South wind around 6 mph.

    High: 48 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Areas of fog after 4am. Otherwise, mostly cloudy, with a low around 37. South wind 3 to 6 mph.

    Low: 37 °F

    Mostly Cloudy
    then Areas
    Fog

  • Saturday

    Saturday: Areas of fog before 10am. Otherwise, cloudy, with a high near 50. Light and variable wind becoming northeast around 6 mph in the morning.

    High: 50 °F

    Areas Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: Areas of fog after 4am. Otherwise, mostly cloudy, with a low around 36. Light northwest wind.

    Low: 36 °F

    Mostly Cloudy
    then Areas
    Fog

  • Sunday

    Sunday: Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 54. Calm wind becoming southwest 5 to 8 mph in the morning.

    High: 54 °F

    Areas Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 54.

    High: 54 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of rain. Cloudy, with a high near 48. South wind around 6 mph.
Tonight
Areas of fog after 4am. Otherwise, mostly cloudy, with a low around 37. South wind 3 to 6 mph.
Saturday
Areas of fog before 10am. Otherwise, cloudy, with a high near 50. Light and variable wind becoming northeast around 6 mph in the morning.
Saturday Night
Areas of fog after 4am. Otherwise, mostly cloudy, with a low around 36. Light northwest wind.
Sunday
Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 54. Calm wind becoming southwest 5 to 8 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 36.
Monday
Mostly cloudy, with a high near 54.
Monday Night
Mostly cloudy, with a low around 36.
Tuesday
Partly sunny, with a high near 54.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Partly sunny, with a high near 53.
Wednesday Night
Partly cloudy, with a low around 35.
Thursday
Mostly sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
Last Update:
2:31 pm PST Jan 30, 2026
Forecast Valid:
2pm PST Jan 30, 2026-6pm PST Feb 5, 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