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

33°F

1°C

Humidity 100%
Wind Speed SW 19 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Wind Chill22°F (-6°C)
Last update 17 Feb 03:59 AM PST
Extended Forecast for

7 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 42. Wind chill values as low as 25. Windy, with a southwest wind 25 to 35 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: 42 °F

    Chance Rain
    and Breezy
    then Rain and
    Windy

  • Tonight

    Tonight: Rain before 4am, then a chance of rain and snow. Low around 34. Wind chill values as low as 20. Very windy, with a west southwest wind 40 to 45 mph, with gusts as high as 65 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 34 °F

    Very Windy.
    Rain then
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 30 percent chance of snow before 10am. Mostly sunny, with a high near 38. Wind chill values as low as 20. Breezy, with a west wind 20 to 25 mph, with gusts as high as 40 mph. Little or no snow accumulation expected.

    High: 38 °F

    Breezy.
    Chance Snow
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow after 4am. Partly cloudy, with a low around 33. Wind chill values as low as 25. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Partly Cloudy
    then Chance
    Snow

  • Thursday

    Thursday: A chance of snow before 10am, then rain and snow likely between 10am and 4pm, then a chance of rain after 4pm. Partly sunny, with a high near 38. Windy, with a west southwest wind 20 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 38 °F

    Rain/Snow
    Likely and
    Windy

  • Thursday Night

    Thursday Night: A chance of rain before 10pm, then a slight chance of snow. Partly cloudy, with a low around 31. Breezy. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 31 °F

    Chance
    Rain/Snow and
    Breezy then
    Slight Chance
    Snow

  • Friday

    Friday: Sunny, with a high near 42.

    High: 42 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

Detailed Forecast

Today
Rain, mainly after 4pm. High near 42. Wind chill values as low as 25. Windy, with a southwest wind 25 to 35 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 34. Wind chill values as low as 20. Very windy, with a west southwest wind 40 to 45 mph, with gusts as high as 65 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday
A 30 percent chance of snow before 10am. Mostly sunny, with a high near 38. Wind chill values as low as 20. Breezy, with a west wind 20 to 25 mph, with gusts as high as 40 mph. Little or no snow accumulation expected.
Wednesday Night
A 30 percent chance of snow after 4am. Partly cloudy, with a low around 33. Wind chill values as low as 25. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. New snow accumulation of less than a half inch possible.
Thursday
A chance of snow before 10am, then rain and snow likely between 10am and 4pm, then a chance of rain after 4pm. Partly sunny, with a high near 38. Windy, with a west southwest wind 20 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of rain before 10pm, then a slight chance of snow. Partly cloudy, with a low around 31. Breezy. Chance of precipitation is 40%. Little or no snow accumulation expected.
Friday
Sunny, with a high near 42.
Friday Night
Mostly clear, with a low around 32.
Saturday
Mostly sunny, with a high near 47.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
A slight chance of rain. Partly cloudy, with a low around 42.
Monday
A chance of rain. Partly sunny, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles WSW Quartz Hill CA
 34.59°N 118.3°W (Elev. 4199 ft)
Last Update:
2:57 am PST Feb 17, 2026
Forecast Valid:
5am PST Feb 17, 2026-6pm PST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation