Spot Forecast
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
549
FNUS76 KSTO 010543
FWSSTO
Spot Forecast for SWR Grassland Track 31.2...USWFS
National Weather Service Sacramento CA
1043 PM PDT Wed Sep 30 2026
Forecast is based on ignition time of 0700 PDT on October 01.
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...Dry and unseasonably warm weather expected at the
burn site Thursday into the weekend. Highs in the 90s with
daytime relative humidities in the low 20s. Marginal good
overnight RH recoveries in the 60s Thursday night, with low
humidities in the teens to low 20s on Friday. Winds will be
light and terrain driven. There are no precipitation or
thunderstorm chances in the forecast period for the area.
.THURSDAY...
Sky/weather.........Sunny.
Max temperature.....90-94.
Min humidity........19-25 percent.
Wind (20 ft)........
Slope/valley.......Light winds becoming south up to 5 mph late in
the afternoon, then becoming light late in the
afternoon.
Ridgetop...........North around 5 mph shifting to the northeast
around 3 mph late in the morning, then shifting
to the south 5 to 6 mph late in the afternoon.
Mixing height.......3600 ft AGL.
Transport winds.....North around 5 mph shifting to the northeast
around 3 mph late in the morning, then shifting
to the south 5 to 6 mph late in the afternoon.
CWR.................0 percent.
Chance of thunder...0 percent.
TIME (PDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR MCR
CWR.............0 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0
Temp............59 60 65 72 77 81 84 88 90 90 90
RH..............50 51 44 40 31 27 22 21 19 19 20
SL/VL wind dir..NW N N N N N E SE S S SE
SL/VL wind spd..2 2 2 3 3 3 3 3 3 5 3
SL/VL wind gust.3 3 5 8 9 9 8 7 8 10 10
Ridge wind dir..N N N N NE NE NE S S S S
Ridge wind spd..5 5 5 5 3 3 3 5 5 5 6
Mix hgt (kft)...0.4 0.6 0.6 0.6 2.0 2.0 2.0 3.6 3.6 3.6 1.9
Transp wind dir.N N N N NE NE NE S S S S
Transp wind spd.5 5 5 5 3 3 3 5 5 5 6
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Min temperature.....59-63.
Max humidity........66-70 percent.
Wind (20 ft)........
Slope/valley.......Light winds.
Ridgetop...........South 1 to 6 mph shifting to the north 3 to 5
mph overnight.
Mixing height.......400 ft AGL.
Transport winds.....South 1 to 6 mph shifting to the north 3 to 5
mph overnight.
CWR.................0 percent.
Chance of thunder...0 percent.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky cover.......MCR MCR MCR MCR MCR PC PC PC PC PC PC MC
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............88 85 80 75 72 70 68 66 64 63 62 61
RH..............26 35 45 50 54 55 59 63 65 66 67 67
SL/VL wind dir..SE SE SW SW SW N N N NW NW NW NW
SL/VL wind spd..3 3 1 1 1 0 0 0 1 1 1 2
SL/VL wind gust.10 10 3 3 3 2 2 2 3 3 3 5
Ridge wind dir..S S S S S SW SW SW NE NE NE N
Ridge wind spd..6 6 6 6 6 1 1 1 3 3 3 5
Mix hgt (kft)...1.9 1.9 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.S S S S S SW SW SW NE NE NE N
Transp wind spd.6 6 6 6 6 1 1 1 3 3 3 5
.FRIDAY...
Sky/weather.........Mostly sunny.
Max temperature.....88-92.
Min humidity........17-22 percent.
Wind (20 ft)........
Slope/valley.......Light winds becoming north up to 5 mph late in
the morning, then becoming light late in the
afternoon.
Ridgetop...........North 5 to 6 mph shifting to the east 3 to 6
mph late in the afternoon.
Mixing height.......3300 ft AGL.
Transport winds.....North 5 to 6 mph shifting to the east 3 to 6
mph late in the afternoon.
CWR.................0 percent.
Chance of thunder...0 percent.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MC MC PC PC PC MC MC MC MC MC MC PC
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............61 61 62 65 71 76 80 84 87 89 89 88
RH..............67 68 68 58 45 33 26 21 19 17 17 21
SL/VL wind dir..NW NW N N N N N N E E E SE
SL/VL wind spd..2 2 3 3 3 5 5 5 3 3 3 3
SL/VL wind gust.5 5 6 6 6 10 10 10 8 8 8 7
Ridge wind dir..N N N N N N N N E E E SE
Ridge wind spd..5 5 6 6 6 6 6 6 3 3 3 6
Mix hgt (kft)...0.4 0.4 0.3 0.3 0.3 1.3 1.3 1.3 3.0 3.0 3.0 3.3
Transp wind dir.N N N N N N N N E E E SE
Transp wind spd.5 5 6 6 6 6 6 6 3 3 3 6
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...
Partly cloudy. Lows in the lower 60s. Highs in the mid 90s. Light
winds.
.SUNDAY...
Partly cloudy. Lows in the lower 60s. Highs in the mid 90s. Light
winds.
.MONDAY...
Mostly clear. Lows in the lower 60s. Highs in the lower 90s.
Light winds.
$$
Forecaster...ZV
Requested by...Frank Alves
Type of request...PRESCRIBED
.TAG 2622870.0/STO
.DELDT 10/01/26
.FormatterVersion 2.0.0
.EMAIL frank_alves@fws.gov