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

Hazardous Weather Conditions

Current conditions at

GRASS MOUNTAIN (GMTC1)

Lat: 34.64078°NLon: 118.41435°WElev: 4626.0ft.

NA

34°F

1°C

Humidity 100%
Wind Speed SSW 19 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Wind Chill23°F (-5°C)
Last update 17 Feb 07:59 AM PST
Extended Forecast for

11 Miles WSW Quartz Hill CA

Flood Watch February 17, 06:00pm until February 18, 06:00am
Winter Storm Warning February 17, 09:00pm until February 19, 09:00am
Click here for hazard details and duration
Flood Watch
Winter Storm Warning

  • Today

    Today: Rain, mainly after 4pm. High near 43. Wind chill values as low as 25. Windy, with a south southwest wind 25 to 30 mph, with gusts as high as 50 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 43 °F

    Chance Rain
    and Breezy
    then Rain and
    Windy

  • Tonight

    Tonight: Rain before 4am, then a chance of rain and snow. Low around 33. Wind chill values as low as 20. Very windy, with a west southwest wind 35 to 40 mph, with gusts as high as 60 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 33 °F

    Very Windy.
    Rain then
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of rain and snow before 10am. Partly sunny, with a high near 41. Wind chill values as low as 20. Breezy, with a west wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 41 °F

    Breezy.
    Chance
    Rain/Snow
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain after 4am. Partly cloudy, with a low around 30. Wind chill values as low as 20. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 30 °F

    Partly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Rain likely, mainly between 10am and 4pm. Partly sunny, with a high near 41. Breezy, with a west southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 41 °F

    Rain Likely
    and Breezy

  • Thursday Night

    Thursday Night: A 50 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 29. Breezy.

    Low: 29 °F

    Chance Rain
    and Breezy
    then Slight
    Chance Rain

  • Friday

    Friday: Sunny, with a high near 45.

    High: 45 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

Detailed Forecast

Today
Rain, mainly after 4pm. High near 43. Wind chill values as low as 25. Windy, with a south southwest wind 25 to 30 mph, with gusts as high as 50 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Rain before 4am, then a chance of rain and snow. Low around 33. Wind chill values as low as 20. Very windy, with a west southwest wind 35 to 40 mph, with gusts as high as 60 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday
A chance of rain and snow before 10am. Partly sunny, with a high near 41. Wind chill values as low as 20. Breezy, with a west wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Wednesday Night
A 30 percent chance of rain after 4am. Partly cloudy, with a low around 30. Wind chill values as low as 20. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain likely, mainly between 10am and 4pm. Partly sunny, with a high near 41. Breezy, with a west southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A 50 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 29. Breezy.
Friday
Sunny, with a high near 45.
Friday Night
Mostly clear, with a low around 31.
Saturday
Mostly sunny, with a high near 50.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
A slight chance of rain. Mostly sunny, with a high near 54.
Sunday Night
A slight chance of rain. Mostly cloudy, with a low around 41.
Monday
A chance of rain. Partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles WSW Quartz Hill CA
 34.63°N 118.39°W (Elev. 3228 ft)
Last Update:
2:57 am PST Feb 17, 2026
Forecast Valid:
8am PST Feb 17, 2026-6pm PST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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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