870
FNUS76 KSTO 140112
FWSSTO
SPOT FORECAST FOR HAMILTON BRANCH RX...CAL FIRE
NATIONAL WEATHER SERVICE SACRAMENTO CA
612 PM PDT WED MAY 13 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 PDT ON MAY 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
MOSTLY SUNNY WITH DRY CONDITIONS OVER THE BURN SITE FRIDAY, WITH LIGHT
TERRAIN DRIVEN WINDS IN THE MORNING TRANSITIONING TO WESTERLY WINDS
8 TO 13 MPH BY THE AFTERNOON. LOW DAYTIME HUMIDITY VALUES IN THE LOW
TEENS. NORTH WINDS ARE EXPECTED TO ARRIVE LATE FRIDAY NIGHT INTO
EARLY SATURDAY MORNING, WHERE SUSTAINED WINDS OF 10 TO 15 MPH ARE
POSSIBLE, WITH GUSTS UP TO 25 MPH. STRONGER NORTH WINDS ARRIVE BY
SUNDAY AND MONDAY, WHERE WIND GUST FROM THE NORTH-NORTHEAST OF
25 TO 30 MPH ARE POSSIBLE. TRANSITION TO MOSTLY DIURNAL WINDS EARLY
NEXT WEEK, WITH CONTINUED WARMER THAN NORMAL HIGH TEMPERATURES AND
LOW RH VALUES IN THE TEENS.
FRIDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....73-77.
MIN HUMIDITY........12-16 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING WEST 5 TO 13 MPH LATE IN
THE AFTERNOON.
RIDGETOP...........NORTHEAST AROUND 6 MPH SHIFTING TO THE WEST 7
TO 15 MPH LATE IN THE MORNING, THEN INCREASING
TO AROUND 17 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......9100 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 6 MPH SHIFTING TO THE WEST 7
TO 15 MPH LATE IN THE MORNING, THEN INCREASING
TO AROUND 17 MPH LATE IN THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CLR CLR CLR CLR CLR CLR CLR CLR CLR
CWR.............0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0
TEMP............52 57 62 66 70 73 74 74 73
RH..............40 33 27 22 18 16 14 13 14
SL/VL WIND DIR..NE NE SW SW SW W W W W
SL/VL WIND SPD..2 2 2 2 2 7 7 7 13
SL/VL WIND GUST.5 5 6 6 6 13 13 13 21
RIDGE WIND DIR..NE NE W W W W W W W
RIDGE WIND SPD..6 6 7 7 7 15 15 15 17
MIX HGT (KFT)...0.8 0.8 4.6 4.6 4.6 9.1 9.1 9.1 7.8
TRANSP WIND DIR.NE NE W W W W W W W
TRANSP WIND SPD.6 6 7 7 7 15 15 15 17
FRIDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....37-41.
MAX HUMIDITY........57-61 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 5 TO 13 MPH SHIFTING TO THE NORTH 5
TO 6 MPH EARLY IN THE MORNING.
RIDGETOP...........WEST 12 TO 17 MPH SHIFTING TO THE NORTH 9 TO 12
MPH LATE IN THE EVENING.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....WEST AROUND 17 MPH SHIFTING TO THE NORTH 9 TO
12 MPH LATE 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 MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR
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............70 66 62 58 53 49 46 44 42 41 40 39
RH..............15 18 22 28 34 40 44 47 50 54 58 59
SL/VL WIND DIR..W W W W W NW NW NW N N N N
SL/VL WIND SPD..13 13 8 8 8 5 5 5 5 5 5 6
SL/VL WIND GUST.21 21 17 17 17 7 7 7 6 6 6 7
RIDGE WIND DIR..W NW NW NW W W W W W W W W
RIDGE WIND SPD..W W W W W N N N N N N N
MIX HGT (KFT)...7.8 7.8 0.8 0.8 0.8 0.5 0.5 0.5 0.6 0.6 0.6 0.5
TRANSP WIND DIR.W W W W W N N N N N N N
TRANSP WIND SPD.17 17 12 12 12 9 9 9 10 10 10 12
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....65-69.
MIN HUMIDITY........20-24 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTH WINDS UP TO 8 MPH SHIFTING TO THE
NORTHWEST 5 TO 10 MPH LATE IN THE AFTERNOON.
RIDGETOP...........NORTH 6 TO 13 MPH SHIFTING TO THE NORTHWEST 8
TO 10 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......9900 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 12 MPH SHIFTING TO THE NORTHEAST 6
TO 13 MPH IN THE MORNING AND EARLY AFTERNOON,
THEN SHIFTING TO THE NORTHWEST 8 TO 10 MPH LATE
IN THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......MCR MCR MCR MCR MCR PC PC PC PC PC PC PC
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............40 41 43 47 51 55 59 62 64 65 66 64
RH..............57 54 49 44 39 34 29 26 23 22 22 23
SL/VL WIND DIR..N N NE NE NE NE NE NE N N N NW
SL/VL WIND SPD..6 6 8 8 8 5 5 5 7 7 7 10
SL/VL WIND GUST.7 7 13 13 13 7 7 7 10 10 10 17
RIDGE WIND DIR..N N N N N NE NE NE NW NW NW W
RIDGE WIND SPD..12 12 13 13 13 6 6 6 8 8 8 10
MIX HGT (KFT)...0.5 0.5 2.5 2.5 2.5 5.8 5.8 5.8 9.9 9.9 9.9 9.7
TRANSP WIND DIR.N N N N N NE NE NE NW NW NW W
TRANSP WIND SPD.12 12 13 13 13 6 6 6 8 8 8 10
FORECASTER...JW
REQUESTED BY...NICHOLAS PARK
TYPE OF REQUEST...PRESCRIBED
.TAG 2613579.0/STO
.DELDT 05/14/26
.FORMATTERVERSION 2.0.0
.EMAIL NICHOLAS.PARK@FIRE.CA.GOV
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