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

Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Hazardous Weather Conditions

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10375°NLon: 123.68508°WElev: 1389.0ft.

NA

29°F

-2°C

Humidity 98%
Wind Speed SSE 0 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 30 Dec 04:52 AM PST
Extended Forecast for

14 Miles S Murphy OR

Air Stagnation Advisory December 30, 05:26am until December 31, 04:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory December 30, 05:26am until December 31, 04:00pm

    NOW until 4:00pm Wed

    Air Stagnation Advisory

  • Today

    High: 49 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 43. South wind 7 to 9 mph.

    Low: 43 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: A 30 percent chance of showers after 4pm. Snow level 5800 feet rising to 6800 feet in the afternoon. Partly sunny, with a high near 50. South wind 5 to 7 mph.

    High: 50 °F

    Partly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 10pm. Mostly cloudy, with a low around 43. South wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Showers
    Likely

  • New Year's Day

    New Year's Day: Rain. High near 46. South southeast wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 46 °F

    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 44. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 44 °F

    Rain

  • Friday

    Friday: Rain. Snow level 6500 feet. High near 46. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 46 °F

    Rain

  • Friday Night

    Friday Night: Rain and snow. Snow level 5500 feet lowering to 4800 feet after midnight . Cloudy, with a low around 38.

    Low: 38 °F

    Rain/Snow

Detailed Forecast

Today
Sunny, with a high near 49. South southwest wind 5 to 9 mph.
Tonight
Increasing clouds, with a low around 43. South wind 7 to 9 mph.
Wednesday
A 30 percent chance of showers after 4pm. Snow level 5800 feet rising to 6800 feet in the afternoon. Partly sunny, with a high near 50. South wind 5 to 7 mph.
Wednesday Night
Showers likely, mainly after 10pm. Mostly cloudy, with a low around 43. South wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
New Year's Day
Rain. High near 46. South southeast wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain. Low around 44. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. Snow level 6500 feet. High near 46. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain and snow. Snow level 5500 feet lowering to 4800 feet after midnight . Cloudy, with a low around 38.
Saturday
Rain, possibly mixed with snow. Snow level 4300 feet. Mostly cloudy, with a high near 40.
Saturday Night
Rain likely, possibly mixed with snow, mainly before 10pm. Snow level 3900 feet. Mostly cloudy, with a low around 36.
Sunday
Rain and snow likely. Snow level 3600 feet rising to 4300 feet in the afternoon. Mostly cloudy, with a high near 41.
Sunday Night
Rain and snow likely. Snow level 4300 feet. Mostly cloudy, with a low around 35.
Monday
Rain and snow likely. Snow level 4000 feet rising to 4600 feet in the afternoon. Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
14 Miles S Murphy OR
 42.15°N 123.34°W (Elev. 3570 ft)
Last Update:
4:16 am PST Dec 30, 2025
Forecast Valid:
5am PST Dec 30, 2025-6pm PST Jan 5, 2026
 
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Additional Resources

Radar & Satellite Image

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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