271
FNUS76 KSTO 200133
FWSSTO

Spot Forecast for Brook...CAL FIRE
National Weather Service Sacramento CA
633 PM PDT Sun Jul 19 2026

Forecast is based on forecast start time of 1905 PDT on July 19.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Non-zero chances (5-15%) in isolated showers and thunderstorms
this evening into Monday early afternoon with best chances for
occurrence this evening into early Monday morning and again Monday
afternoon. Current forecasts indicate a lack of energy for
thunderstorms but the low confidence nature of monsoonal moisture
forecasting can`t rule out any thunderstorm/shower development.
After Tuesday, better thunderstorm chances shift to the Sierra and
drier conditions develop.

Overnight humidity values will be in the low 40s, lowering into
the low 20s during the afternoon/evening. Humidity values trend
slightly higher into the upper teens to mid 20s through midweek,
with improving overnight recoveries. Winds will remain in a
diurnal pattern with south winds generally 10 mph or less in the
afternoon through Tuesday. Breezier afternoon south winds expected
mid to late week with gusts 15-20 mph at times.


.TONIGHT...

Sky/weather.........Mostly cloudy. 5-10 chance of showers/thunderstorms..
Min temperature.....71-75.
Max humidity........41-45 percent.
Wind (20 ft)........
 Slope/valley.......South winds up to 5 mph early in the evening
                    becoming light.
 Ridgetop...........South 3 to 9 mph becoming light.
Mixing height.......400 ft AGL.
Transport winds.....South up to 9 mph shifting to the north up to 6
                    mph late in the evening.
CWR.................5 percent.
Chance of thunder...5-10 percent.

TIME (PDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky cover.......MC  MC  MC  MC  CDY MC  MC  MC  CDY MC  MC  MC
CWR.............0   0   5   5   5   5   5   5   5   5   5   5
Chc of thdr (%).0   0   5   10  10  10  10  10  10  5   5   5
Temp............96  95  92  88  84  82  81  80  80  80  79  78
RH..............16  18  20  25  29  32  35  35  36  36  37  37
SL/VL wind dir..S   S   S   S   NE  N   N   NE  NE  N   NW  NW
SL/VL wind spd..5   3   3   3   2   2   2   2   1   2   2   2
SL/VL wind gust.8   7   6   6   5   3   3   3   2   3   3   3
Ridge wind dir..S   S   S   S   S   N   N   N   N   N   N   N
Ridge wind spd..9   9   8   8   8   3   3   3   3   3   3   6
Mix hgt (kft)...4.1 4.1 0.5 0.5 0.5 0.5 0.5 0.5 0.4 0.4 0.4 0.5
Transp wind dir.S   S   S   S   S   N   N   N   N   N   N   N
Transp wind spd.9   9   8   8   8   3   3   3   3   3   3   6

.MONDAY...

Sky/weather.........Mostly cloudy then becoming partly sunny. 5-10 chance of showers/thunderstorms.
Max temperature.....93-97.
Min humidity........20-24 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming south up to 5 mph late in
                    the afternoon with gusts under 10 mph.
 Ridgetop...........North around 6 mph shifting to the south up to 7
                    mph early in the morning.
Mixing height.......4000 ft AGL.
Transport winds.....North around 6 mph shifting to the south up to 7
                    mph early in the morning.
CWR.................5 percent.
Chance of thunder...5-10 percent.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MC  MC  MC  MC  CDY PC  MC  MC  MC  MC  PC  MC
CWR.............5   5   5   5   5   5   5   5   5   5   5   5
Chc of thdr (%).5   5   5   5   5   5   10  10  10  10  10  10
Temp............77  74  77  78  82  84  86  88  91  93  93  94
RH..............41  45  43  41  38  35  33  30  27  25  23  22
SL/VL wind dir..NW  NE  S   SW  SW  SW  SW  SW  SW  S   S   S
SL/VL wind spd..2   2   2   2   2   3   3   3   3   5   5   3
SL/VL wind gust.5   3   5   5   5   6   6   7   8   9   9   9
Ridge wind dir..N   N   S   S   S   SW  SW  SW  S   S   S   S
Ridge wind spd..6   6   2   2   2   5   5   5   6   6   6   7
Mix hgt (kft)...0.5 0.5 1.0 1.0 1.0 2.4 2.4 2.4 4.0 4.0 4.0 3.7
Transp wind dir.N   N   S   S   S   SW  SW  SW  S   S   S   S
Transp wind spd.6   6   2   2   2   5   5   5   6   6   6   7

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...
Partly cloudy. Lows around 70. Highs in the upper 90s. South winds 4 to 8 mph during the afternoon, with gusts near or less than 10 mph.
.WEDNESDAY...
Mostly clear. Lows in the lower 70s. Highs around 100. South winds 5 to 9 mph during the afternoon, with gusts 15-20 mph
.THURSDAY...
Clear. Lows around 70. Highs in the upper 90s. South winds 5 to 9 mph during the afternoon, with gusts 15-20 mph

$$
Forecaster...KF
Requested by...Troy Velin
Type of request...WILDFIRE
.TAG 2617720.1/STO
.DELDT 07/19/26
.FormatterVersion 2.0.0
.EMAIL SHU.Intel@fire.ca.gov,troy.velin@fire.ca.gov,SHUECCStaff@fire.ca.gov