Powerful Winter Storm from the Upper Midwest into the Northeast; Severe Thunderstorms in the Midwest and Ohio Valley

A rapidly-intensifying storm is expected to bring heavy snow, blizzard conditions, and icing from the Upper Midwest through the Great Lakes and Northeast. Scattered severe thunderstorms may produce severe/damaging wind gusts and a couple of tornadoes across parts of the Midwest and lower Ohio Valley through the evening. Arctic air will expand across the central and southern U.S.. Read More >

Current conditions at

LYONS VALLEY (COWC1)

Lat: 39.12583°NLon: 123.07333°WElev: 3355.0ft.

NA

49°F

9°C

Humidity 30%
Wind Speed E 3 MPH
Barometer NA
Dewpoint 19°F (-7°C)
Visibility NA
Last update 29 Dec 03:01 AM PST
Extended Forecast for

4 Miles NNW Hopland CA

  • Overnight

    Overnight: Patchy fog.  Otherwise, mostly cloudy, with a low around 36. North northwest wind around 5 mph.

    Low: 36 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog before 10am.  Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 63. East northeast wind around 5 mph becoming calm  in the morning.

    High: 63 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 10pm.  Otherwise, increasing clouds, with a low around 38. Light northeast wind.

    Low: 38 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 10am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 64. East northeast wind around 6 mph becoming calm  in the afternoon.

    High: 64 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. Calm wind becoming east northeast around 5 mph after midnight.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely, mainly after 4pm.  Mostly cloudy, with a high near 58. East southeast wind around 6 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain.  Low around 46. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Rain

  • New Year's Day

    New Year's Day: Rain.  Mostly cloudy, with a high near 58.

    High: 58 °F

    Rain

  • Thursday Night

    Thursday Night: Rain.  Cloudy, with a low around 47.

    Low: 47 °F

    Rain

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 36. North northwest wind around 5 mph.
Monday
Patchy fog before 10am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 63. East northeast wind around 5 mph becoming calm in the morning.
Monday Night
Patchy fog after 10pm. Otherwise, increasing clouds, with a low around 38. Light northeast wind.
Tuesday
Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 64. East northeast wind around 6 mph becoming calm in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 42. Calm wind becoming east northeast around 5 mph after midnight.
Wednesday
Rain likely, mainly after 4pm. Mostly cloudy, with a high near 58. East southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain. Low around 46. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
New Year's Day
Rain. Mostly cloudy, with a high near 58.
Thursday Night
Rain. Cloudy, with a low around 47.
Friday
Rain. Mostly cloudy, with a high near 58.
Friday Night
Rain. Mostly cloudy, with a low around 46.
Saturday
Rain likely. Mostly cloudy, with a high near 55.
Saturday Night
Rain likely. Mostly cloudy, with a low around 44.
Sunday
Rain likely. Mostly cloudy, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Hopland CA
 39.03°N 123.15°W (Elev. 597 ft)
1:10 am PST Dec 29, 2025
3am PST Dec 29, 2025-6pm PST Jan 4, 2026
 
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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