138
FNUS76 KSTO 190241
FWSSTO
SPOT FORECAST FOR BROOK...CAL FIRE
NATIONAL WEATHER SERVICE SACRAMENTO CA
741 PM PDT SAT JUL 18 2026
FORECAST IS BASED ON FORECAST START TIME OF 2000 PDT ON JULY 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
CLEAR CONDITIONS ARE EXPECTED OVERNIGHT WITH SOUTH TO SOUTHEAST
WINDS LESS THAN 10 MPH THROUGH THE EVENING, WITH RELATIVE
HUMIDITIES IN THE TEENS. OVERNIGHT, HUMIDITIES INCREASE INTO THE
20S AND 30S AFTER 9 PM AND THROUGH 3 AM. DURING THIS TIME WINDS
WILL BE MAINLY TERRAIN DRIVEN OUT OF THE NORTHEAST UP TO 5 MPH UP
SLOPES/VALLEYS WITH RIDGE WINDS UP TO 10 MPH.
SIMILAR HUMIDITIES ARE EXPECTED ON SUNDAY COMPARED TO TODAY
(7/18), WITH OVERNIGHT/EARLY MORNING VALUES IN THE 30S AND MINIMUM
DAYTIME VALUES IN THE MID TO LOW TEENS. WINDS WILL START OUT FROM
THE NORTHEAST IN THE MORNING WITH SUSTAINED SPEEDS LESS THAN 10
MPH, BECOMING SOUTH TO SOUTHEAST DURING THE AFTERNOON UP TO 5 MPH
WITH GUSTS TO 10 MPH. THERE IS A NONZERO (LESS THAN 10%) CHANCE
FOR LIGHT SHOWERS/VIRGA SUNDAY AFTERNOON AS MONSOONAL MOISTURE
PUSHES INTO THE REGION, ALTHOUGH THERE IS STILL UNCERTAINTY
REGARDING LOCATION OF ANY SHOWER DEVELOPMENT. HUMIDITY VALUES
BEGIN TO TREND SLIGHTLY HIGHER MONDAY THROUGH THE MIDDLE OF THE WEEK.
REST OF TONIGHT
SKY/WEATHER.........CLEAR THEN BECOMING PARTLY CLOUDY.
MIN TEMPERATURE.....64-68.
MAX HUMIDITY........37-41 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING NORTH UP TO 5 MPH AFTER 3
AM.
RIDGETOP...........SOUTH AROUND 8 MPH SHIFTING TO THE NORTHEAST
LATE IN THE EVENING.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 8 MPH SHIFTING TO THE NORTHEAST
LATE IN THE EVENING.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 8 PM MIDNGT 4 AM
SKY COVER.......CLEAR CLEAR PCLDY
CWR.............0 0 0
CHC OF THDR (%).0 0 0
TEMP............93 75 70
RH..............17 34 39
SL/VL WIND......S 3G7 NE 3G6 N 5G7
RIDGETOP WIND...S 8 E 6 S 10
MIX HGT (FT)....500 500 400
TRANSPORT WIND..S 8 E 3 N 6
SUNDAY
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....97-101.
MIN HUMIDITY........13-17 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHEAST WINDS UP TO 5 MPH EARLY IN THE
MORNING BECOMING LIGHT, THEN BECOMING SOUTHWEST
UP TO 5 MPH IN THE AFTERNOON WITH GUSTS TO 10 MPH.
RIDGETOP...........NORTH 5 TO 8 MPH SHIFTING TO THE SOUTH LATE IN
THE MORNING.
MIXING HEIGHT.......5400 FT AGL.
TRANSPORT WINDS.....NORTH 5 TO 8 MPH SHIFTING TO THE SOUTH LATE IN
THE MORNING.
CWR.................0 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......PC MC PC PC MCR MCR MC MCR MCR 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............67 70 73 77 84 88 91 95 97 97 98 97
RH..............41 40 36 31 28 24 22 19 17 16 15 15
SL/VL WIND DIR..NE NE NE S SW SW S S S S SW SW
SL/VL WIND SPD..5 3 3 2 2 2 3 5 5 5 5 5
SL/VL WIND GUST.7 7 6 5 5 6 7 9 10 10 10 9
RIDGE WIND DIR..NE NE N N N S S S S S S S
RIDGE WIND SPD..8 8 5 5 5 5 5 5 7 7 7 8
MIX HGT (KFT)...0.4 0.4 1.2 1.2 1.2 3.9 3.9 3.9 5.4 5.4 5.4 4.6
TRANSP WIND DIR.NE NE N N N S S S S S S S
TRANSP WIND SPD.8 8 5 5 5 5 5 5 7 7 7 8
SUNDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY.
MIN TEMPERATURE.....71-75.
MAX HUMIDITY........39-44 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS UP TO 5 MPH EARLY IN THE
EVENING WITH GUSTS TO 10 MPH BECOMING LIGHT LESS THAN 5 MPH OVERNIGHT.
RIDGETOP...........SOUTH 5 TO 8 MPH SHIFTING TO THE NORTH UP TO 6
MPH OVERNIGHT.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTH 5 TO 8 MPH SHIFTING TO THE NORTH UP TO 6
MPH OVERNIGHT.
CWR.................1 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......MC MC MC MC MC MC MC MC 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............97 96 92 88 85 83 81 80 80 79 78 78
RH..............15 17 20 24 29 33 37 38 39 40 41 43
SL/VL WIND DIR..SW SW S S S NE NE NE N N N N
SL/VL WIND SPD..5 5 3 3 3 2 2 2 2 2 2 2
SL/VL WIND GUST.9 9 6 6 6 3 3 3 3 3 3 5
RIDGE WIND DIR..S S S S S S S S NE NE NE N
RIDGE WIND SPD..8 8 7 7 7 5 5 5 5 5 5 6
MIX HGT (KFT)...4.6 4.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.S S S S S S S S NE NE NE N
TRANSP WIND SPD.8 8 7 7 7 5 5 5 5 5 5 6
FORECASTER...KF
REQUESTED BY...TROY VELIN
TYPE OF REQUEST...WILDFIRE
.TAG 2617720.0/STO
.DELDT 07/18/26
.FORMATTERVERSION 2.0.0
.EMAIL TROY.VELIN@FIRE.CA.GOV,SHUECCSTAFF@FIRE.CA.GOV,SHU.INTEL@FIRE.CA.GOV
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