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

36°F

2°C

Humidity 99%
Wind Speed SW 34 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Wind Chill22°F (-6°C)
Last update 18 Feb 12:59 AM PST
Extended Forecast for

11 Miles WSW Quartz Hill CA

Flood Watch until February 18, 06:00am
Winter Storm Warning until February 20, 07:00am
Click here for hazard details and duration
Flood Watch
Winter Storm Warning
  •  
    Flood Watch until February 18, 06:00am
    Winter Storm Warning until February 20, 07:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 33 °F

    Rain/Snow and
    Very Windy

  • Wednesday

    Wednesday: A 30 percent chance of snow showers before 10am. Partly sunny, with a high near 41. Wind chill values as low as 20. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph. Little or no snow accumulation expected.

    High: 41 °F

    Breezy.
    Chance Snow
    Showers then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow after 4am. Partly cloudy, with a low around 30. Wind chill values as low as 20. West wind around 15 mph, with gusts as high as 20 mph. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Partly Cloudy
    then Chance
    Snow

  • Thursday

    Thursday: A chance of snow before 10am, then rain. High near 41. Wind chill values as low as 20. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Breezy.
    Rain/Snow
    then Rain

  • Thursday Night

    Thursday Night: A chance of rain before 10pm, then a slight chance of snow. Partly cloudy, with a low around 29. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Chance
    Rain/Snow and
    Breezy then
    Slight Chance
    Snow

  • Friday

    Friday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

Detailed Forecast

Overnight
Rain before 4am, then rain, possibly mixed with snow showers. Low around 33. Wind chill values as low as 20. Very windy, with a southwest wind around 40 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday
A 30 percent chance of snow showers before 10am. Partly sunny, with a high near 41. Wind chill values as low as 20. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph. Little or no snow accumulation expected.
Wednesday Night
A 30 percent chance of snow after 4am. Partly cloudy, with a low around 30. Wind chill values as low as 20. West wind around 15 mph, with gusts as high as 20 mph. New snow accumulation of less than a half inch possible.
Thursday
A chance of snow before 10am, then rain. High near 41. Wind chill values as low as 20. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. 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 29. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Friday
Mostly sunny, with a high near 43.
Friday Night
Mostly clear, with a low around 30.
Saturday
Mostly sunny, with a high near 50.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Mostly sunny, with a high near 53.
Sunday Night
A slight chance of rain. Mostly cloudy, with a low around 42.
Monday
A chance of rain. Partly sunny, with a high near 58.
Monday Night
A chance of rain. Mostly cloudy, with a low around 45.
Tuesday
A chance of rain. Mostly cloudy, with a high near 58.
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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:
1:06 am PST Feb 18, 2026
Forecast Valid:
1am PST Feb 18, 2026-6pm PST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation