Spot Forecast
Issued by NWS San Diego, CA
Issued by NWS San Diego, CA
308
FNUS76 KSGX 011546
FWSSGX
Spot Forecast for Grass Valley...Forest Service
National Weather Service San Diego CA
846 AM PDT Wed May 1 2024
Forecast is based on ignition time of 0900 PDT on May 03.
If conditions become unrepresentative, contact the National Weather
Service.
.DISCUSSION...
A shallower marine layer is expected Thursday through Saturday morning,
not expected to reach the incident. Dry afternoons followed by
modest humidity recovery at night. Onshore winds and humidity
will increase Saturday afternoon, leading to more clouds, fog and
a chance of wetting rains Saturday night and Sunday morning (up to
about 0.20 inch total). Southwest winds will be strongest
Saturday evening with gusts as high as 25-35 mph at tree top
level, then westerly winds again Sunday afternoon with similar
speeds. Fair and dry weather with weaker winds Monday and Tuesday.
The HYSPLIT model dispersion output link will be emailed separately.
.THURSDAY...
Sky/weather.........Sunny (0-10 percent).
Max temperature.....Around 68.
Min humidity........25 percent.
Eye level winds.....Northwest winds around 4 mph shifting to the
south 5 to 7 mph with gusts to around 12 mph in
the afternoon.
Wind (20 ft)........
Slope/valley.......North winds around 6 mph shifting to the
northwest 6 to 7 mph late in the morning, then
shifting to the southwest 8 to 10 mph with
gusts to around 17 mph in the afternoon.
Ridgetop...........North around 5 mph shifting to the west late in
the morning, then shifting to the southwest 10
to 15 mph in the afternoon.
CWR.................0 percent.
LAL.................1.
Mixing height.......6600 ft AGL.
Transport winds.....North 7 to 8 mph shifting to the southwest 7 to
13 mph in the afternoon.
TIME (PDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........7 7 3 3 3 4 4 4 6
Weather cov.....
Weather type....
Tstm cov........
Temp............58 62 64 65 67 67 67 67 65
RH..............28 25 25 25 27 29 30 31 33
20 FT wind dir..N N NW NW SW S S S S
20 FT wind spd..6 6 6 7 8 8 9 10 10
20 FT wind gust.11 11 11 11 13 15 15 16 17
Eye lvl wnd dir.N N NW NW SW S S S S
Eye lvl wnd spd.4 4 4 4 5 6 7 7 7
Eye lvl wnd gst.8 8 8 8 9 11 11 12 12
Ridge wind dir..N N NW W SW SW SW SW SW
Ridge wind spd..5 5 5 5 10 10 15 15 15
CWR.............0 0 0 0 0 0 0 0 0
LAL.............1 1 1 1 1 1 1 1 1
.THURSDAY NIGHT...
Sky/weather.........Mostly clear (5-15 percent).
Min temperature.....Around 47.
Max humidity........54 percent.
Eye level winds.....Southeast winds 5 to 7 mph with gusts to around
12 mph shifting to the east around 4 mph in the
late evening and overnight, then shifting to
the south after 3 am.
Wind (20 ft)........
Slope/valley.......South winds 5 to 9 mph with gusts to around 16
mph shifting to the east 5 to 7 mph in the late
evening and overnight, then shifting to the
southeast around 5 mph after 3 am.
Ridgetop...........South 10 to 15 mph shifting to the southwest
around 5 mph late in the evening, then shifting
to the southeast overnight.
CWR.................0 percent.
LAL.................1.
Mixing height.......200 ft AGL.
Transport winds.....South 8 to 13 mph shifting to the east 3 to 7
mph in the late evening and overnight, then
shifting to the southeast 5 to 6 mph after 3
am.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........6 6 6 6 6 8 8 8 8 8 8 9
Weather cov.....
Weather type....
Tstm cov........
Temp............62 59 56 54 53 52 51 50 49 48 48 48
RH..............37 44 50 53 54 53 51 48 46 47 47 51
20 FT wind dir..S S S SE E NE NE E E E SE S
20 FT wind spd..10 9 8 7 6 5 6 6 7 6 5 5
20 FT wind gust.16 15 14 12 11 10 10 11 12 11 10 9
Eye lvl wnd dir.S S S SE E NE NE E E E SE S
Eye lvl wnd spd.7 7 6 5 4 4 4 4 4 4 4 3
Eye lvl wnd gst.12 11 10 9 8 7 7 8 9 8 7 7
Ridge wind dir..SW S S S SW W SW SE SE SE S S
Ridge wind spd..15 15 10 10 5 5 5 5 5 5 5 5
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
LAL.............1 1 1 1 1 1 1 1 1 1 1 1
.FRIDAY...
Sky/weather.........Mostly sunny (0-10 percent).
Max temperature.....Around 66.
Min humidity........33 percent.
Eye level winds.....South winds up to 9 mph. Gusts up to 14 mph in
the afternoon.
Wind (20 ft)........
Slope/valley.......South winds 5 to 12 mph. Gusts up to 20 mph in
the afternoon.
Ridgetop...........South 10 to 15 mph increasing to around 20 mph
late in the afternoon.
CWR.................0 percent.
LAL.................1.
Mixing height.......4400 ft AGL.
Transport winds.....South 7 to 15 mph.
TIME (PDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........9 9 5 5 5 5 5 5 4
Weather cov.....
Weather type....
Tstm cov........
Temp............57 60 63 65 65 65 66 65 64
RH..............40 36 34 33 34 35 35 36 38
20 FT wind dir..S S S S S S S S S
20 FT wind spd..5 5 6 7 8 10 12 12 12
20 FT wind gust.9 10 11 12 15 16 18 20 20
Eye lvl wnd dir.S S S S S S S S S
Eye lvl wnd spd.4 4 4 5 6 7 8 9 9
Eye lvl wnd gst.7 7 8 9 11 12 13 14 14
Ridge wind dir..S S S S S S S S S
Ridge wind spd..10 10 10 15 15 15 15 20 20
CWR.............0 0 0 0 0 0 0 0 0
LAL.............1 1 1 1 1 1 1 1 1
.FRIDAY NIGHT...
Sky/weather.........Mostly clear (0-10 percent).
Min temperature.....Around 46.
Max humidity........64 percent.
Eye level winds.....South winds up to 9 mph. Gusts up to 14 mph in
the evening.
Wind (20 ft)........
Slope/valley.......South winds 6 to 12 mph. Gusts up to 20 mph in
the evening.
Ridgetop...........South 15 to 20 mph decreasing to around 10 mph
after 3 am.
CWR.................0 percent.
LAL.................1 until 0500.
Mixing height.......200 ft AGL.
Transport winds.....South 10 to 15 mph.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........4 4 4 4 4 9 9 9 9 9 9 9
Weather cov.....
Weather type....
Tstm cov........
Temp............61 58 56 54 52 51 50 49 48 47 46 47
RH..............43 50 56 60 62 63 64 64 64 64 63 61
20 FT wind dir..S S S S S S S S SE SE SE S
20 FT wind spd..12 12 10 10 10 8 8 8 6 6 6 6
20 FT wind gust.20 18 17 16 15 15 13 12 11 11 11 11
Eye lvl wnd dir.S S S S S S S SE SE SE S S
Eye lvl wnd spd.9 8 7 7 7 6 6 4 4 4 4 4
Eye lvl wnd gst.14 13 12 12 11 11 9 9 8 8 8 8
Ridge wind dir..S S S S S S S S S S S S
Ridge wind spd..20 15 15 15 15 15 15 15 15 10 10 10
CWR.............0 0 0 0 0 0 0 0 0 0 0 M
LAL.............1 1 1 1 1 1 1 1 1 1 1 M
.SATURDAY...
Sky/weather.........Mostly sunny (10-20 percent) then becoming
partly cloudy (50-60 percent).
Max temperature.....Around 62.
Min humidity........42 percent.
Eye level winds.....South winds up to 11 mph. Gusts up to 16 mph
late in the morning.
Wind (20 ft)........
Slope/valley.......South winds 6 to 14 mph. Gusts up to 22 mph
late in the morning.
Ridgetop...........South 10 to 15 mph increasing to around 30 mph.
CWR.................2 percent.
LAL.................
Mixing height.......3700 ft AGL.
Transport winds.....South 10 to 17 mph increasing to around 30 mph.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........9 9 9 9 9 18 18 18 18 18 18 54
Weather cov.....
Weather type....
Tstm cov........
Temp............48 49 52 55 58 61 62 61 62 61 60 58
RH..............59 56 52 48 44 42 42 45 46 48 51 54
20 FT wind dir..S S S S S S S S S S S S
20 FT wind spd..6 6 7 7 7 10 10 10 14 14 14 14
20 FT wind gust.11 11 13 13 13 17 17 17 21 21 21 22
Eye lvl wnd dir.S S S S S S S S S S S S
Eye lvl wnd spd.4 4 5 5 5 7 7 7 9 9 9 11
Eye lvl wnd gst.8 8 9 9 9 12 12 12 15 15 15 16
Ridge wind dir..S S S S S S S S S S S S
Ridge wind spd..10 10 15 15 15 20 20 25 25 25 30 30
CWR.............M M M M M M M M M M M M
LAL.............M M M M M M M M M M M M
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT AND SUNDAY...
Cooler. Mostly cloudy with chance of showers. Lows in the lower
40s. Highs in the upper 40s. Southwest winds around 12 mph at eye
level.
.MONDAY...
Partly cloudy. Lows in the upper 30s. Highs in the upper 50s.
Southwest winds around 8 mph at eye level.
.TUESDAY...
Mostly clear. Lows in the lower 40s. Highs in the lower 60s.
Northwest winds around 7 mph at eye level.
$$
Forecaster...MIGUEL MILLER
Requested by...Brian Grant
Type of request...PRESCRIBED
.TAG 2412921.0/SGX
.DELDT 05/01/24
.FormatterVersion 2.0.0
.EMAIL brian.grant3@usda.gov