552
FNUS76 KSTO 120726
FWSSTO
SPOT FORECAST FOR TWAIN INCIDENT...US FOREST SERVICE
NATIONAL WEATHER SERVICE SACRAMENTO CA
1226 AM PDT SUN JUL 12 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 PDT ON JULY 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SURGES OF MONSOONAL MOISTURE WILL PUSH UP FROM THE SOUTH BRINGING
IN UNSETTLED WEATHER THROUGH MID WEEK. THERE IS A 15-20% CHANCE
FOR ISOLATED SHOWERS OR VIRGA IN THE VICINITY THIS MORNING AND
AFTERNOON, BUT LITTLE TO NO ACCUMULATING RAINFALL IS ANTICIPATED;
AND CHANCES FOR ISOLATED AFTERNOON THUNDERSTORMS TODAY ARE LESS
THAN 10%. HIGHEST CHANCES (15-20%) FOR ISOLATED THUNDERSTORMS AND
WETTING RAIN ARE EXPECTED ON MONDAY AND TUESDAY, WITH HIGHEST
POTENTIAL FOR THUNDERSTORMS CURRENTLY EXPECTED MONDAY AND TUESDAY
AFTERNOONS. GUSTY AND ERRATIC WINDS WILL BE POSSIBLE AROUND ANY
THUNDERSTORMS THAT DEVELOP. THUNDERSTORM CHANCES LINGER ON
WEDNESDAY, HOWEVER PROBABILITIES OF DEVELOPMENT ARE LESS THAN 10%.
ADDITIONALLY, WINDS WILL REMAIN LIGHT AND VARIABLE OVERNIGHT,
WITH BREEZIER SOUTH TO SOUTHWEST WINDS DEVELOPING DURING THE
DAYTIME HOURS THIS WEEK.
SUNDAY
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN IN THE
MORNING.
MAX TEMPERATURE.....89-93.
MIN HUMIDITY........21-25 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS LESS THAN 10 MPH, BECOMING SOUTHWEST 5 TO 7 MPH LATE
IN THE AFTERNOON WITH GUSTS TO 15 MPH.
RIDGETOP...........EAST TO SOUTHEAST 5 TO 10 MPH, INCREASING TO 10 TO 20 MPH IN THE AFTERNOON.
IN THE AFTERNOON.
MIXING HEIGHT.......6500 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 5 TO 6 MPH INCREASING TO SOUTH 14 TO
18 MPH LATE IN THE MORNING.
CWR.................5 PERCENT.
CHANCE OF THUNDER...3 PERCENT.
TIME (PDT) 6 AM 9 AM NOON 3 PM
SKY COVER.......CLOUDY CLOUDY MCLDY MCLDY
CWR.............10 10 0 0
CHC OF THDR (%).0 0 0 0
TEMP............62 69 85 89
RH..............54 44 28 24
SL/VL WIND......N 0G2 N 0G3 S 2G9 S 6G15
RIDGETOP WIND...E 5 SE 6 S 17 S 18
MIX HGT (FT)....400 1100 6000 6500
TRANSPORT WIND..E 5 SE 6 S 17 S 18
SUNDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN EARLY IN THE
MORNING.
MIN TEMPERATURE.....61-65.
MAX HUMIDITY........66-70 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS LESS THAN 10 MPH.
RIDGETOP...........SOUTH 10 TO 15 MPH EARLY, WEAKENING TO LESS THAN 10 MPH OVERNIGHT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 6 TO 14 MPH SHIFTING TO THE SOUTHEAST
2 TO 3 MPH LATE IN THE EVENING, THEN SHIFTING
TO THE EAST AROUND 3 MPH EARLY IN THE MORNING.
CWR.................3 PERCENT.
CHANCE OF THUNDER...3 PERCENT.
TIME (PDT) 6 PM 9 PM MIDNGT 3 AM
SKY COVER.......MCLDY MCLDY MCLDY CLOUDY
CWR.............0 0 0 0
CHC OF THDR (%).0 0 0 0
TEMP............88 78 70 66
RH..............29 44 54 61
SL/VL WIND......SW 2G8 N 0G2 N 0G2 N 0G2
RIDGETOP WIND...S 14 SW 6 S 2 E 3
MIX HGT (FT)....4200 500 400 400
TRANSPORT WIND..S 14 SW 6 S 2 E 3
MONDAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
CHANCE OF RAIN IN THE MORNING. SLIGHT (15-20%)
CHANCE OF SHOWERS AND THUNDERSTORMS LATE IN THE
AFTERNOON.
MAX TEMPERATURE.....88-92.
MIN HUMIDITY........32-36 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS LATE IN THE AFTERNOON.
RIDGETOP...........SOUTH AROUND 5-10 MPH WITH GUSTS TO 15 MPH IN THE AFTERNOON.
MIXING HEIGHT.......7700 FT AGL.
TRANSPORT WINDS.....EAST AROUND 3 MPH SHIFTING TO THE SOUTH 6
TO 10 MPH EARLY IN THE MORNING.
CWR.................10 PERCENT.
CHANCE OF THUNDER...15-20 PERCENT.
TIME (PDT) 6 AM 9 AM NOON 3 PM
SKY COVER.......CLOUDY MCLDY MCLDY PCLDY
CWR.............10 10 10 10
CHC OF THDR (%).0 0 10 20
TEMP............63 70 84 88
RH..............68 59 42 34
SL/VL WIND......N 0G2 NW 1G5 SW 1G9 SW 3G10
RIDGETOP WIND...E 3 SW 6 S 7 S 9G15
MIX HGT (FT)....400 1700 5300 6800
TRANSPORT WIND..E 3 SW 6 S 7 S 9
FORECASTER...KF
REQUESTED BY...E. BADALAMENTI
TYPE OF REQUEST...WILDFIRE
.TAG 2617242.0/STO
.DELDT 07/12/26
.FORMATTERVERSION 2.0.0
.EMAIL BRETT.LOOMIS@USDA.GOV,JAMES.LICO@USDA.GOV,JOSEPH.MCGINN@USDA.GOV,EDWARD.BADALAMENTI@USDA.GOV,JORDAN.WADE@USDA.GOV
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