Spot Forecast
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
651
FNUS76 KSGX 101216
FWSSGX
Spot Forecast for Grass Valley...USFS
National Weather Service San Diego CA
516 AM PDT Fri Oct 10 2025
Forecast is based on ignition time of 0800 PDT on October 10.
If conditions become unrepresentative, contact the National Weather
Service.
.DISCUSSION...
Occasional showers will continue today, with an increasing chance of
thunderstorms this afternoon. Precipitation will end by sunset and
clouds will begin clearing tonight and Saturday. Some clouds to
continue Saturday, but with no precipitation expected. Cooler
Saturday even with greater sunshine. Breezier southwest winds
Saturday afternoon and evening.
.TODAY...
Sky/weather.........Partly cloudy (25-35 percent). Slight chance of
showers early in the morning. Slight chance of
thunderstorms this afternoon.
Max temperature.....Around 72.
Min humidity........58 percent.
Eye level winds.....South winds 5 to 7 mph. Gusts up to 12 mph in
the morning.
Wind (20 ft)........
Slope/valley.......South winds 8 to 10 mph. Gusts up to 16 mph.
Gusty and erratic winds expected near any
thunderstorms.
Ridgetop...........South 15 to 20 mph.
CWR.................11 percent.
Mixing height.......3600 ft AGL.
Transport winds.....South 12 to 18 mph.
TIME (PDT) 8 AM 10 AM NOON 2 PM 4 PM
Sky (%).........35 35 32 29 29
Weather cov.....S CHC S CHC S CHC S CHC S CHC
Weather type....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
Tstm cov........ S CHC S CHC S CHC
Temp............63 68 72 71 71
RH..............73 62 58 61 61
20 ft wind......S 8 SE 8 S 9 S 10 S 10
20 ft wind gust.15 13 15 16 16
Eye level wind..S 6 SE 5 S 6 S 7 S 7
Eye lvl wnd gst.11 9 11 12 12
Ridgetop wind...S 20 S 15 S 15 S 20 S 15
CWR.............10 10 10 10 10
.TONIGHT...
Sky/weather.........Partly cloudy (20-30 percent).
Min temperature.....Around 56.
Max humidity........85 percent.
Eye level winds.....South winds 6 to 7 mph with gusts to around 12
mph.
Wind (20 ft)........
Slope/valley.......South winds 9 to 10 mph with gusts to around 17
mph.
Ridgetop...........South 15 to 20 mph.
CWR.................4 percent.
Mixing height.......100 ft AGL.
Transport winds.....South 12 to 15 mph.
TIME (PDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
Sky (%).........35 35 35 37 37 37
Weather cov.....
Weather type....NONE NONE NONE NONE NONE NONE
Tstm cov........
Temp............67 64 62 61 59 58
RH..............70 71 73 76 80 78
20 ft wind......S 9 S 9 S 9 SE 9 S 10 S 10
20 ft wind gust.15 15 15 15 16 17
Eye level wind..S 7 S 6 S 6 SE 6 S 7 S 7
Eye lvl wnd gst.11 11 11 11 12 12
Ridgetop wind...S 15 S 20 S 20 S 20 S 20 S 20
CWR.............0 0 0 0 0 0
.SATURDAY...
Sky/weather.........Mostly sunny (5-15 percent).
Max temperature.....Around 64.
Min humidity........52 percent.
Eye level winds.....South winds 6 to 9 mph with gusts to around 15
mph.
Wind (20 ft)........
Slope/valley.......South winds 9 to 13 mph with gusts to around 20
mph.
Ridgetop...........South 20 to 25 mph shifting to the southwest
around 15 mph late in the afternoon.
CWR.................1 percent.
Mixing height.......2300 ft AGL.
Transport winds.....South 15 to 22 mph.
TIME (PDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
Sky (%).........15 15 15 9 9 9
Weather cov.....
Weather type....NONE NONE NONE NONE NONE NONE
Tstm cov........
Temp............57 57 61 61 63 62
RH..............84 82 68 58 53 52
20 ft wind......S 10 S 12 S 13 S 12 S 12 S 9
20 ft wind gust.16 20 20 18 18 15
Eye level wind..S 7 S 9 S 9 S 8 S 8 S 7
Eye lvl wnd gst.12 14 15 13 13 11
Ridgetop wind...S 20 S 25 S 25 SW 25 SW 25 SW 20
CWR.............0 0 0 0 0 0
$$
Forecaster...MIGUEL MILLER
Requested by...B. Grant
Type of request...PRESCRIBED
.TAG 2523264.0/SGX
.DELDT 10/10/25
.FormatterVersion 2.0.0
.EMAIL brian.grant3@usda.gov,victor.alvarez3@usda.gov