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

Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

Hazardous Weather Conditions

Current conditions at

Montague Siskiyou County Airport (KSIY)

Lat: 41.77375°NLon: 122.46817°WElev: 2644.0ft.

light rain,mist

37°F

3°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 29.84 in (1010.5 mb)
Dewpoint 37°F (3°C)
Visibility 4.00 mi
Last update 01 Jan 06:20 AM PST
Extended Forecast for

15 Miles ESE Happy Camp CA

Winter Storm Watch January 2, 10:00pm until January 4, 10:00pm
Click here for hazard details and duration
Winter Storm Watch

  • New Year's Day

    New Year's Day: Rain, mainly after 1pm. Snow level 8800 feet lowering to 8300 feet in the afternoon . High near 41. South wind around 7 mph. Chance of precipitation is 90%.

    High: 41 °F

    Rain Likely
    then Rain

  • Tonight

    Tonight: Rain, mainly before 7pm. Snow level 7900 feet lowering to 7200 feet after midnight . Steady temperature around 40. South wind around 10 mph. Chance of precipitation is 80%.

    Low: 40 °F

    Rain then
    Chance Rain

  • Friday

    Friday: Rain likely, mainly after 4pm. Snow level 7100 feet lowering to 6400 feet in the afternoon . Partly sunny, with a high near 41. South southeast wind 8 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 41 °F

    Chance Rain
    then Rain
    Likely

  • Friday Night

    Friday Night: Rain likely, possibly mixed with snow before 10pm, then rain between 10pm and 1am, then rain and snow after 1am. Snow level 6100 feet. Low around 37. Southeast wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 37 °F

    Rain/Snow

  • Saturday

    Saturday: Snow. High near 39. South southeast wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 39 °F

    Snow

  • Saturday Night

    Saturday Night: Snow. Low around 35. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 35 °F

    Snow

  • Sunday

    Sunday: Snow. High near 36. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    High: 36 °F

    Snow

  • Sunday Night

    Sunday Night: Snow. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Snow

  • Monday

    Monday: Snow likely, mainly before 4pm. Mostly cloudy, with a high near 35.

    High: 35 °F

    Snow Likely

Detailed Forecast

New Year's Day
Rain, mainly after 1pm. Snow level 8800 feet lowering to 8300 feet in the afternoon . High near 41. South wind around 7 mph. Chance of precipitation is 90%.
Tonight
Rain, mainly before 7pm. Snow level 7900 feet lowering to 7200 feet after midnight . Steady temperature around 40. South wind around 10 mph. Chance of precipitation is 80%.
Friday
Rain likely, mainly after 4pm. Snow level 7100 feet lowering to 6400 feet in the afternoon . Partly sunny, with a high near 41. South southeast wind 8 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Friday Night
Rain likely, possibly mixed with snow before 10pm, then rain between 10pm and 1am, then rain and snow after 1am. Snow level 6100 feet. Low around 37. Southeast wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Saturday
Snow. High near 39. South southeast wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Saturday Night
Snow. Low around 35. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Sunday
Snow. High near 36. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Sunday Night
Snow. Mostly cloudy, with a low around 32.
Monday
Snow likely, mainly before 4pm. Mostly cloudy, with a high near 35.
Monday Night
A chance of snow, mainly before 10pm. Mostly cloudy, with a low around 30.
Tuesday
A slight chance of snow. Partly sunny, with a high near 36.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 29.
Wednesday
A chance of snow. Partly sunny, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles ESE Happy Camp CA
 41.74°N 123.07°W (Elev. 5745 ft)
Last Update:
4:41 am PST Jan 1, 2026
Forecast Valid:
6am PST Jan 1, 2026-6pm PST Jan 7, 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