190
FNUS76 KSTO 011627
FWSSTO

Spot Forecast for BCFSC Upper Ridge Rambling Unit...CAL FIRE
National Weather Service Sacramento CA
927 AM PDT Thu Oct 1 2026

Forecast is based on ignition time of 1200 PDT on October 01.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Unseasonably hot temperatures at the burn site over the next
several days. Temperatures will be mid to upper 80 today and
Friday, climbing into the low 90s over the weekend and into early
next week. Inversions will keep overnight lows in the upper 60s to
low 70s and humidities low overnight. Winds will be light and
terrain driven, generally less than 12 mph. Humidities, both
daytime and overnight, are forecast to trend lower after today as
the hot and dry conditions remain in place. Extended guidance
favors above-normal temperatures continuing past the first week of
October. No precipitation or thunderstorm chances in the forecast
period for the burn site.


.REST OF TODAY...

Sky/weather.........Sunny.
Max temperature.....82-86.
Min humidity........21-25 percent.
Wind (20 ft)........
 Slope/valley.......Light winds.
 Ridgetop...........South 6 to 8 mph.
Mixing height.......3900 ft AGL.
Transport winds.....South 6 to 8 mph.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......CLR CLR CLR CLR CLR CLR
CWR.............0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0
Temp............81  82  83  83  84  83
RH..............27  27  26  25  24  24
SL/VL wind dir..SW  SW  SW  SW  S   S
SL/VL wind spd..3   3   3   3   3   2
SL/VL wind gust.8   8   9   9   8   7
Ridge wind dir..S   S   S   S   S   S
Ridge wind spd..7   7   8   8   8   6
Mix hgt (kft)...3.1 3.1 3.9 3.9 3.9 1.6
Transp wind dir.S   S   S   S   S   S
Transp wind spd.7   7   8   8   8   6

.TONIGHT...

Sky/weather.........Mostly clear then becoming mostly cloudy.
Min temperature.....61-65.
Max humidity........41-45 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming northeast up to 5 mph
                    early in the morning.
 Ridgetop...........South around 6 mph shifting to the east 6 to 8
                    mph early in the evening.
Mixing height.......400 ft AGL.
Transport winds.....South around 6 mph shifting to the east 6 to 8
                    mph early in the evening.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky cover.......CLR CLR CLR MCR MCR MCR 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............82  77  70  67  66  66  66  66  66  65  65  65
RH..............29  35  42  44  44  43  41  40  39  39  39  39
SL/VL wind dir..S   E   E   E   E   NE  NE  NE  NE  NE  NE  NE
SL/VL wind spd..1   2   3   3   3   3   3   3   3   3   3   5
SL/VL wind gust.5   6   8   8   7   7   7   7   7   8   8   9
Ridge wind dir..S   S   E   E   E   E   E   E   E   E   E   E
Ridge wind spd..6   6   6   6   6   6   6   6   6   6   6   8
Mix hgt (kft)...1.6 1.6 0.4 0.4 0.4 0.4 0.4 0.4 0.5 0.5 0.5 0.4
Transp wind dir.S   S   E   E   E   E   E   E   E   E   E   E
Transp wind spd.6   6   6   6   6   6   6   6   6   6   6   8

.FRIDAY...

Sky/weather.........Partly sunny.
Max temperature.....82-86.
Min humidity........19-23 percent.
Wind (20 ft)........
 Slope/valley.......Northeast winds up to 5 mph early in the
                    morning becoming light.
 Ridgetop...........East 5 to 8 mph shifting to the south 6 to 8
                    mph late in the morning.
Mixing height.......4700 ft AGL.
Transport winds.....East 5 to 8 mph shifting to the south 6 to 8
                    mph late in the morning.
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  MC  MC  MC  PC  PC  PC  MC  MC  MC  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............65  63  65  69  77  79  81  82  83  83  83  84
RH..............38  37  39  37  30  27  25  25  25  23  23  24
SL/VL wind dir..NE  NE  NE  NE  NE  SW  SW  SW  SW  SW  SW  SW
SL/VL wind spd..5   5   3   3   3   2   2   2   3   3   3   2
SL/VL wind gust.9   9   10  10  10  8   8   8   9   9   9   6
Ridge wind dir..E   E   E   E   E   S   S   S   S   S   S   S
Ridge wind spd..8   8   5   5   5   8   8   8   8   8   8   6
Mix hgt (kft)...0.4 0.4 1.2 1.2 1.2 4.3 4.3 4.3 4.7 4.7 4.7 2.1
Transp wind dir.E   E   E   E   E   S   S   S   S   S   S   S
Transp wind spd.8   8   5   5   5   8   8   8   8   8   8   6

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...
Partly cloudy. Lows in the lower 60s. Highs in the low 90s.
Light winds.
.SUNDAY...
Partly cloudy. Lows in the upper 60s. Highs in the low 90s. Light
winds.
.MONDAY...
Mostly clear. Lows in the upper 60s. Highs in the low 90s. Light
winds.

$$
Forecaster...KF
Requested by...Matthew Brady
Type of request...PRESCRIBED
.TAG 2622692.2/STO
.DELDT 10/01/26
.FormatterVersion 2.0.0
.EMAIL Matthew.brady@fire.ca.gov,rob.bartsch@fire.ca.gov,Matthew.Brady@fire.ca.gov,Jason.finney@fire.ca.gov