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

Snow Squalls in the Northeast U.S. on Thursday; Heavy Rain Along the Gulf Coast

An arctic cold front will move through the Great Lakes and Northeast on Thursday, bringing moderate to heavy snow, strong winds, and possible whiteout conditions through Thursday afternoon. A storm system interacting with Gulf moisture will bring moderate to heavy rainfall to the western and central Gulf Coast on Thursday. Isolated instances of flash flooding will be possible. Read More >

Hazardous Weather Conditions

Current conditions at

LYONS VALLEY (COWC1)

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

NA

53°F

12°C

Humidity 19%
Wind Speed NW 4 MPH
Barometer NA
Dewpoint 12°F (-11°C)
Visibility NA
Last update 04 Dec 02:01 AM PST
Extended Forecast for

2 Miles ENE Hopland CA

Frost Advisory December 4, 03:00am until December 4, 09:00am
Click here for hazard details and duration
Frost Advisory

  • Overnight

    Overnight: Mostly cloudy, with a low around 34. Calm wind.

    Low: 34 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 66. Calm wind.

    High: 66 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 7am. Otherwise, sunny, with a high near 67. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 67 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 44. North northwest wind around 6 mph.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 65. Calm wind becoming northwest around 6 mph in the morning.

    High: 65 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy
    then Patchy
    Fog

Detailed Forecast

Overnight
Mostly cloudy, with a low around 34. Calm wind.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 66. Calm wind.
Thursday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 37. Calm wind.
Friday
Patchy fog before 7am. Otherwise, sunny, with a high near 67. Calm wind becoming northwest around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 44. North northwest wind around 6 mph.
Saturday
Mostly sunny, with a high near 65. Calm wind becoming northwest around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 41.
Sunday
Mostly sunny, with a high near 65.
Sunday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 42.
Monday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 67.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 68.
Tuesday Night
Mostly cloudy, with a low around 45.
Wednesday
Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Hopland CA
 38.97°N 123.1°W (Elev. 577 ft)
Last Update:
1:10 am PST Dec 4, 2025
Forecast Valid:
2am PST Dec 4, 2025-6pm PST Dec 10, 2025
 
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Additional Resources

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Chance of Precipitation