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

38°F

3°C

Humidity 99%
Wind Speed SSW 21 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Wind Chill28°F (-2°C)
Last update 16 Feb 05:59 AM PST
Extended Forecast for

11 Miles WSW Quartz Hill CA

Winter Storm Watch February 17, 09:00pm until February 19, 09:00am
Flood Watch February 16, 09:00am until February 16, 09:00pm
High Wind Warning until February 16, 06:00pm
Click here for hazard details and duration
Winter Storm Watch
Flood Watch
High Wind Warning
  •  
    High Wind Warning until February 16, 06:00pm

    NOW until 6:00pm Mon

    High Wind Warning

  • Washington's Birthday

    High: 45 °F

    Heavy Rain
    and Windy

  • Tonight

    Tonight: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 37. Wind chill values as low as 25. Windy, with a south southwest wind around 30 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Windy. Rain
    Likely then
    Chance Rain

  • Tuesday

    Tuesday: A 40 percent chance of rain, mainly after 10am. Partly sunny, with a high near 44. Wind chill values as low as 20. Windy, with a southwest wind 25 to 35 mph, with gusts as high as 50 mph. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 44 °F

    Chance Rain
    and Windy

  • Tuesday Night

    Tuesday Night: Rain, mainly before 4am. Low around 35. Wind chill values as low as 20. Windy, with a southwest wind around 35 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 35 °F

    Rain and
    Windy

  • Wednesday

    Wednesday: A 40 percent chance of rain before 10am. Partly sunny, with a high near 42. Breezy, with a west wind 20 to 25 mph, with gusts as high as 35 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 42 °F

    Breezy.
    Chance Rain
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow, mainly after 4am. Partly cloudy, with a low around 32. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Chance Snow

  • Thursday

    Thursday: A chance of snow before 10am, then a chance of rain. Partly sunny, with a high near 41. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A chance of rain. Mostly cloudy, with a low around 30.

    Low: 30 °F

    Chance Rain

Detailed Forecast

Washington's Birthday
Rain. The rain could be heavy at times. High near 45. Wind chill values as low as 30. 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 1 and 2 inches possible.
Tonight
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 37. Wind chill values as low as 25. Windy, with a south southwest wind around 30 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
A 40 percent chance of rain, mainly after 10am. Partly sunny, with a high near 44. Wind chill values as low as 20. Windy, with a southwest wind 25 to 35 mph, with gusts as high as 50 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain, mainly before 4am. Low around 35. Wind chill values as low as 20. Windy, with a southwest wind around 35 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Wednesday
A 40 percent chance of rain before 10am. Partly sunny, with a high near 42. Breezy, with a west wind 20 to 25 mph, with gusts as high as 35 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 30 percent chance of snow, mainly after 4am. Partly cloudy, with a low around 32. New snow accumulation of less than a half inch possible.
Thursday
A chance of snow before 10am, then a chance of rain. Partly sunny, with a high near 41. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 30.
Friday
Mostly sunny, with a high near 46.
Friday Night
Partly cloudy, with a low around 32.
Saturday
Sunny, with a high near 50.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Mostly sunny, with a high near 55.
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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:
2:42 am PST Feb 16, 2026
Forecast Valid:
6am PST Feb 16, 2026-6pm PST Feb 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation