Spot Forecast
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
497
FNUS76 KSGX 272042
FWSSGX
Spot Forecast for Grass Valley...Forest Service
National Weather Service San Diego CA
142 PM PDT Sat Apr 27 2024
Forecast is based on ignition time of 0900 PDT on April 28.
If conditions become unrepresentative, contact the National Weather
Service.
.DISCUSSION...A departing frontal system has left a deep moisture layer with low clouds banked
up along the south side of the mountains. Similar to Friday the low clouds should again pull back into
the valley. Mostly clear skies beginning Sunday.
.SUNDAY...
Sky/weather.........Mostly sunny (0-10 percent).
Max temperature.....Around 64.
Min humidity........38 percent.
Eye level winds.....Northwest winds around 4 mph shifting to the
southwest up to 6 mph with gusts to around 10
mph late in the afternoon.
Wind (20 ft)........
Slope/valley.......North winds around 7 mph becoming 6 to 7 mph in
the late morning and early afternoon, then
shifting to the southwest 5 to 8 mph with gusts
to around 14 mph late in the afternoon.
Ridgetop...........North around 10 mph shifting to the west in the
afternoon.
CWR.................0 percent.
Mixing height.......5000 ft AGL.
Transport winds.....North 7 to 9 mph shifting to the southwest
around 8 mph late in the afternoon.
TIME (PDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........7 7 6 6 6 6 6 6 6
Weather cov.....
Weather type....
Tstm cov........
Temp............53 57 59 62 63 64 63 63 62
RH..............50 44 41 38 38 39 41 43 47
20 FT wind dir..N N N N NW W SW SW SW
20 FT wind spd..7 7 7 6 6 5 6 6 8
20 FT wind gust.11 12 11 11 10 9 11 11 14
Eye lvl wnd dir.N N N N NW W SW SW SW
Eye lvl wnd spd.4 4 4 4 4 4 4 4 6
Eye lvl wnd gst.8 9 8 8 7 7 8 8 10
Ridge wind dir..N N N NW W W W SW SW
Ridge wind spd..10 10 10 10 5 5 5 10 10
CWR.............0 0 0 0 0 0 0 0 0
.SUNDAY NIGHT...
Sky/weather.........Clear (0-10 percent).
Min temperature.....Around 46.
Max humidity........67 percent.
Eye level winds.....South winds 5 to 6 mph with gusts to around 10
mph early in the evening becoming light, then
becoming east around 4 mph late in the evening
becoming light becoming southeast around 4 mph
overnight.
Wind (20 ft)........
Slope/valley.......South winds 5 to 7 mph with gusts to around 14
mph early in the evening becoming light, then
becoming east around 5 mph late in the evening
becoming light becoming southeast around 5 mph
overnight.
Ridgetop...........Southwest around 5 mph shifting to the
southeast in the late evening and overnight,
then shifting to the south overnight.
CWR.................0 percent.
Mixing height.......200 ft AGL.
Transport winds.....South 5 to 7 mph shifting to the southeast 3 to
5 mph in the late evening and overnight.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........6 6 6 6 6 4 4 4 4 4 4 5
Weather cov.....
Weather type....
Tstm cov........
Temp............59 56 54 52 50 50 51 48 48 48 48 46
RH..............52 58 64 64 66 64 61 66 67 63 63 64
20 FT wind dir..SW S S S E E SE SE SE SE SE SE
20 FT wind spd..8 7 3 1 2 5 3 2 5 5 5 5
20 FT wind gust.14 12 7 4 6 9 6 6 8 9 9 9
Eye lvl wnd dir.SW S S S E E SE SE SE SE SE SE
Eye lvl wnd spd.6 5 2 1 1 4 2 1 3 3 4 4
Eye lvl wnd gst.10 9 5 3 4 7 5 5 6 7 7 7
Ridge wind dir..SW SW S S SE E SE S S S S S
Ridge wind spd..5 5 5 5 5 5 5 5 5 5 5 5
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
.MONDAY...
Sky/weather.........Mostly sunny (0-10 percent).
Max temperature.....Around 65.
Min humidity........35 percent.
Eye level winds.....Southeast winds around 4 mph early in the
morning becoming light, then becoming south up
to 6 mph with gusts to around 11 mph late in
the morning.
Wind (20 ft)........
Slope/valley.......South winds 5 to 9 mph early in the morning
becoming light, then becoming south 5 to 9 mph
with gusts to around 15 mph late in the
morning.
Ridgetop...........South 5 to 10 mph.
CWR.................0 percent.
Mixing height.......4100 ft AGL.
Transport winds.....South 5 to 7 mph shifting to the southwest
around 8 mph late in the afternoon.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........5 5 5 5 5 7 7 7 7 7 7 8
Weather cov.....
Weather type....
Tstm cov........
Temp............46 52 51 55 57 59 63 60 61 61 64 60
RH..............63 51 53 46 43 40 35 40 40 39 35 41
20 FT wind dir..SE SE S S S S S S S S S S
20 FT wind spd..5 5 3 3 2 5 5 6 8 8 8 9
20 FT wind gust.9 8 7 6 6 9 10 11 14 14 14 15
Eye lvl wnd dir.SE SE S S S S S S S S S S
Eye lvl wnd spd.4 3 2 2 2 4 4 4 6 6 6 6
Eye lvl wnd gst.7 6 5 5 5 7 7 8 10 10 10 11
Ridge wind dir..S S S S S SW SW SW SW SW SW SW
Ridge wind spd..5 5 5 5 5 5 10 10 10 10 10 10
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...
Mostly clear. Lows in the mid 40s. Highs in the upper 60s. North
winds around 6 mph.
.WEDNESDAY...
Clear. Lows in the mid 40s. Highs in the mid 60s. Southwest winds
around 5 mph.
.THURSDAY...
Mostly clear. Lows in the upper 40s. Highs in the mid 60s.
Northwest winds around 7 mph.
$$
Forecaster...IVORY SMALL
Requested by...Brian Grant
Type of request...PRESCRIBED
.TAG 2412613.0/SGX
.DELDT 04/27/24
.FormatterVersion 2.0.0
.EMAIL Brian.grant3@usda.gov