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

Air Stagnation Advisory until December 31, 04:00 PM PST

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

29°F

-2°C

Humidity	98%
Wind Speed	S 0 MPH
Barometer	NA
Dewpoint	28°F (-2°C)
Visibility	NA
Last update	30 Dec 06:52 AM PST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

9 Miles WNW Illinois Valley OR

Air Stagnation Advisory December 30, 07:48am until December 31, 04:00pm

Click here for hazard details and duration

Air Stagnation Advisory

Air Stagnation Advisory December 30, 07:48am until December 31, 04:00pm
NOW until 4:00pm Wed
Air Stagnation Advisory
Today
High: 50 °F
Sunny
Tonight
Low: 41 °F
Increasing
Clouds
Wednesday
High: 50 °F
Partly Sunny
then Chance
Showers
Wednesday Night
Low: 41 °F
Showers
Likely
New Year's Day
High: 45 °F
Rain
Thursday Night
Low: 43 °F
Rain
Friday
High: 44 °F
Showers
Friday Night
Low: 37 °F
Rain/Snow

Detailed Forecast

Today

Sunny, with a high near 50. South wind 5 to 10 mph becoming light southwest in the afternoon.

Tonight

Increasing clouds, with a low around 41. South wind around 8 mph.

Wednesday

A 30 percent chance of showers after 4pm. Snow level 5500 feet rising to 6700 feet in the afternoon. Partly sunny, with a high near 50. South wind 6 to 8 mph becoming east southeast in the morning.

Wednesday Night

Showers likely, mainly after 10pm. Mostly cloudy, with a low around 41. Southeast wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

New Year's Day

Rain. High near 45. South southeast wind around 8 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

Thursday Night

Rain. Low around 43. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

Friday

Rain before 4pm, then showers and possibly a thunderstorm after 4pm. Snow level 6400 feet. High near 44. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Friday Night

Rain, possibly mixed with snow. Some thunder is also possible. Snow level 5300 feet lowering to 4700 feet after midnight . Cloudy, with a low around 37.

Saturday

Rain, possibly mixed with snow. Snow level 4300 feet. Cloudy, with a high near 38.

Saturday Night

Rain likely, possibly mixed with snow. Snow level 4000 feet. Mostly cloudy, with a low around 35.

Sunday

Rain likely, possibly mixed with snow. Snow level 4000 feet. Mostly cloudy, with a high near 40.

Sunday Night

Rain likely, possibly mixed with snow. Snow level 4400 feet. Mostly cloudy, with a low around 34.

Monday

Rain likely, possibly mixed with snow. Snow level 4500 feet. Mostly cloudy, with a high near 41.