373
FNUS76 KSTO 132354
FWSSTO

Spot Forecast for Ponderosa...CAL FIRE
National Weather Service Sacramento CA
454 PM PDT Wed Aug 13 2025

Forecast is based on forecast start time of 1900 PDT on August 13.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Mostly clear and dry conditions for the rest of the night, with
similar conditions expected tomorrow at the Ponderosa wildfire.
Terrain driven winds, under 10 mph expected for the next few
days. Enhanced onshore flow will help overnight recoveries and
improve daytime humidity values as well. Slightly below to
seasonable high temperatures will continue in this pattern.

.REST OF TONIGHT...

Sky/weather.........Clear.
Min temperature.....59-63.
Max humidity........63-67 percent.
Wind (20 ft)........
 Slope/valley.......South winds up to 5 mph early in the evening
                    becoming light.
 Ridgetop...........South 8 to 9 mph shifting to the northeast
                    around 5 mph early in the morning.
Mixing height.......0 ft AGL.
Transport winds.....South 8 to 9 mph shifting to the northeast
                    around 5 mph early in the morning.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      7 PM         11 PM        3 AM
Sky cover.......CLEAR        CLEAR        CLEAR
CWR.............0            0            0
Chc of thdr (%).0            0            0
Temp............83           69           66
RH..............37           65           63
SL/VL wind......S 5G10       E 3G7        NE 2G5
Ridgetop wind...SW 10        SW 5         SW 5
Mix hgt (ft)....2300         BLW100       BLW100
Transport wind..S 9          SE 8         E 5

.THURSDAY...

Sky/weather.........Sunny.
Max temperature.....85-89.
Min humidity........30-34 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming southwest up to 6 mph late
                    in the morning.
 Ridgetop...........Northeast around 5 mph shifting to the west 3
                    to 7 mph early in the morning.
Mixing height.......3100 ft AGL.
Transport winds.....Northeast around 5 mph shifting to the west 3
                    to 7 mph early in the morning.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6 AM         10 AM        2 PM
Sky cover.......CLEAR        CLEAR        CLEAR
CWR.............0            0            0
Chc of thdr (%).0            0            0
Temp............65           72           83
RH..............57           52           38
SL/VL wind......NE 2G5       W 2G7        SW 6G12
Ridgetop wind...W 5          NW 10        W 10
Mix hgt (ft)....BLW100       500          3100
Transport wind..NE 5         W 3          SW 7

.THURSDAY NIGHT...

Sky/weather.........Clear.
Min temperature.....64-68.
Max humidity........54-58 percent.
Wind (20 ft)........
 Slope/valley.......Southwest winds up to 5 mph early in the
                    evening becoming light.
 Ridgetop...........South 3 to 6 mph shifting to the east 5 to 6
                    mph late in the evening, then shifting to the
                    north around 6 mph early in the morning.
Mixing height.......0 ft AGL.
Transport winds.....South 3 to 6 mph shifting to the east 5 to 6
                    mph late in the evening, then shifting to the
                    north around 6 mph early in the morning.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6 PM         10 PM        2 AM
Sky cover.......CLEAR        CLEAR        CLEAR
CWR.............0            0            0
Chc of thdr (%).0            0            0
Temp............85           73           70
RH..............32           52           56
SL/VL wind......SW 5G10      S 2G6        NE 2G5
Ridgetop wind...NW 10        NW 10        NW 5
Mix hgt (ft)....2500         BLW100       BLW100
Transport wind..SW 6         S 3          NE 5

.FRIDAY...

Sky/weather.........Sunny.
Max temperature.....88-92.
Min humidity........27-31 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming southwest up to 6 mph late
                    in the morning.
 Ridgetop...........North 3 to 6 mph shifting to the west 6 to 9
                    mph late in the morning.
Mixing height.......7300 ft AGL.
Transport winds.....North around 6 mph decreasing to 3 to 6 mph in
                    the morning, then shifting to the west 6 to 9
                    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.......CLR CLR CLR CLR CLR CLR CLR CLR MCR MCR MCR CLR
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............67  66  67  70  75  79  82  85  87  88  88  88
RH..............57  57  56  52  47  42  39  36  34  31  29  29
SL/VL wind dir..NE  NE  E   E   E   SW  SW  SW  SW  SW  SW  SW
SL/VL wind spd..3   3   2   2   2   5   5   5   6   6   6   5
SL/VL wind gust.5   5   6   6   6   10  10  10  13  13  13  10
Ridge wind dir..NW  NW  NW  NW  W   W   W   W   W   W   W   W
Ridge wind spd..5   5   5   5   5   5   5   5   5   10  10  10
Mix hgt (kft)...0.1 0.1 0.1 0.1 0.1 1.8 1.8 1.8 5.4 5.4 5.4 7.3
Transp wind dir.N   N   N   N   N   W   W   W   W   W   W   W
Transp wind spd.6   6   3   3   3   6   6   6   7   7   7   9

$$
Forecaster...JW
Requested by...Dan Ziebron
Type of request...WILDFIRE
.TAG 2519855.0/STO
.DELDT 08/13/25
.FormatterVersion 2.0.0
.EMAIL daniel.ziebron@fire.ca.gov