987
FNUS76 KSTO 210032
FWSSTO
SPOT FORECAST FOR IOWA HILL INCIDENT...CAL FIRE NEU
NATIONAL WEATHER SERVICE SACRAMENTO CA
532 PM PDT SUN SEP 20 2026
FORECAST IS BASED ON FORECAST START TIME OF 1800 PDT ON SEPTEMBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WINDS NEAR THE FIRE'S LOCATION OVER THE LAST 24 HOURS HAVE BEEN PRIMARILY
LIGHT (LESS THAN 5 MPH) AND VARIABLE, HOWEVER OVER SEVERAL PERIODS DURING
THIS TIME THEY HAVE BEEN NON-EXISTENT. OVERNIGHT TONIGHT, THAT TREND IS
EXPECTED TO CONTINUE, WITH LIGHT AND VARIABLE WINDS OCCURRING IF ANY DO AT
ALL. NEARBY LOCATIONS MAY SEE LIGHT (LESS THAN 5 MPH) EASTERLY WINDS.
STARTING MONDAY, WINDS WILL REMAIN FAIRLY LIGHT (LESS THAN 10 MPH SUSTAINED),
BUT WILL HAVE A MORE CLEAR DIURNAL COMPONENT FOLLOWING THE TERRAIN. THERE IS
UP TO A 20% CHANCE FOR GUSTS UP TO 15 MPH, BUT GENERALLY WINDS SHOULD BE
LIGHTER. OVERNIGHT THURSDAY INTO FRIDAY, WINDS WILL BE MORE CLEARLY SOUTHERLY
AND BREEZY WITH GUSTS UP TO 15 MPH IN THE FORECAST; THERE IS A 50-75% CHANCE
FOR GUSTS OF 15 MPH OR HIGHER ON BOTH OF THESE DAYS. NON-ZERO CHANCE (LESS
THAN 5%) FOR SHOWERS BOTH MONDAY EVENING AND AGAIN ON FRIDAY MORNING. DAYTIME
HUMIDITIES WILL BE IN THE LOW 30S THROUGH TUESDAY, DECREASING SLIGHTLY
WEDNESDAY AND THURSDAY BUT REMAINING PRIMARILY IN THE 20S STILL. THURSDAY
SEES THE HIGHEST CHANCE FOR HUMIDITIES IN THE HIGH TEENS. OTHERWISE,
SEASONABLE TEMPERATURES WITH HIGHS IN THE LOW TO MID 80S AND LOWS IN THE HIGH
50S TO LOW 60S.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY THEN
BECOMING MOSTLY CLOUDY.
MIN TEMPERATURE.....58-63.
MAX HUMIDITY........47-54 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT AND VARIABLE WINDS, LESS THAN 5 MPH. SLIGHT
EAST TO SOUTHEASTERLY COMPONENT OUTSIDE OF THE AREA
OF THE INCIDENT.
RIDGETOP...........NORTHEAST TO EAST UP TO 6 MPH.
MIXING HEIGHT.......300 FT AGL.
TRANSPORT WINDS.....NORTHEAST TO EAST UP TO 6 MPH.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......MC MC MC MC MC MC MC PC 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............78 75 68 66 66 65 66 65 64 63 63 62
RH..............34 40 48 49 49 49 47 47 47 47 46 46
SL/VL WIND DIR..N N N NE N N N N N N N N
SL/VL WIND SPD..0 0 1 1 0 0 0 0 0 0 0 0
SL/VL WIND GUST.2 1 3 3 2 2 1 1 1 1 1 1
RIDGE WIND DIR..SW SW N N N NE NE NE E E E NE
RIDGE WIND SPD..5 5 2 2 2 5 5 5 5 5 5 6
MIX HGT (KFT)...1.6 1.6 0.3 0.3 0.3 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TRANSP WIND DIR.SW SW N N N NE NE NE E E E NE
TRANSP WIND SPD.5 5 2 2 2 5 5 5 5 5 5 6
MONDAY
SKY/WEATHER.........MOSTLY SUNNY. PATCHY SMOKE EARLY IN THE
MORNING.
MAX TEMPERATURE.....77-83.
MIN HUMIDITY........30-35 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT TERRAIN DRIVEN WINDS WITH GUSTS UP TO
10 MPH IN THE EARLY AFTERNOON.
RIDGETOP...........NORTHEAST AROUND 6 MPH SHIFTING TO THE WEST 2
TO 8 MPH EARLY IN THE MORNING, THEN SHIFTING TO
THE SOUTHWEST 6 TO 8 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......3600 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 6 MPH SHIFTING TO THE WEST 2
TO 8 MPH EARLY IN THE MORNING, THEN SHIFTING TO
THE SOUTHWEST 6 TO 8 MPH LATE IN THE AFTERNOON.
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 PC PC PC PC MCR MCR MCR MCR PC MCR 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............62 61 61 65 72 75 77 78 78 78 79 78
RH..............45 45 46 45 38 34 32 32 32 32 32 33
SL/VL WIND DIR..N N E SW W W W W SW SW SW SW
SL/VL WIND SPD..0 0 1 1 1 2 3 3 3 3 2 1
SL/VL WIND GUST.2 2 3 3 5 7 8 10 10 9 8 7
RIDGE WIND DIR..NE NE NW NW NW W W W SW SW SW SW
RIDGE WIND SPD..6 6 2 2 2 8 8 8 8 8 8 6
MIX HGT (KFT)...0.4 0.4 0.9 0.9 0.9 2.7 2.7 2.7 3.6 3.6 3.6 2.0
TRANSP WIND DIR.NE NE NW NW NW W W W SW SW SW SW
TRANSP WIND SPD.6 6 2 2 2 8 8 8 8 8 8 6
MONDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....57-61.
MAX HUMIDITY........58-64 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT TERRAIN DRIVEN WINDS.
RIDGETOP...........SOUTHWEST AROUND 6 MPH SHIFTING TO THE EAST 3
TO 6 MPH EARLY IN THE EVENING, THEN SHIFTING TO
THE NORTHEAST 6 TO 7 MPH OVERNIGHT.
MIXING HEIGHT.......300 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 6 MPH SHIFTING TO THE EAST 3
TO 6 MPH EARLY IN THE EVENING, THEN SHIFTING TO
THE NORTHEAST 6 TO 7 MPH OVERNIGHT.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......PC PC PC PC PC 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............77 73 66 64 63 62 62 61 60 60 59 59
RH..............36 44 54 59 60 60 59 59 60 61 60 60
SL/VL WIND DIR..SW SW E E E N N N N N N N
SL/VL WIND SPD..1 1 1 1 1 0 0 0 0 0 0 0
SL/VL WIND GUST.7 7 3 3 3 2 2 2 2 2 2 2
RIDGE WIND DIR..SW SW SE SE SE E E E NE NE NE NE
RIDGE WIND SPD..6 6 3 3 3 6 6 6 6 6 6 7
MIX HGT (KFT)...2.0 2.0 0.3 0.3 0.3 0.3 0.3 0.3 0.4 0.4 0.4 0.5
TRANSP WIND DIR.SW SW SE SE SE E E E NE NE NE NE
TRANSP WIND SPD.6 6 3 3 3 6 6 6 6 6 6 7
TUESDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....78-84.
MIN HUMIDITY........30-35 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT TERRAIN DRIVEN WINDS WITH GUSTS UP TO
10 MPH IN THE EARLY AFTERNOON.
RIDGETOP...........EAST AROUND 7 MPH SHIFTING TO THE WEST 6 TO 8
MPH LATE IN THE MORNING.
MIXING HEIGHT.......3400 FT AGL.
TRANSPORT WINDS.....EAST AROUND 7 MPH SHIFTING TO THE WEST 6 TO 8
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.......MCR MCR CLR CLR CLR CLR CLR CLR CLR CLR CLR 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............59 59 59 64 70 75 78 79 79 80 81 79
RH..............58 58 57 51 43 36 33 33 33 31 30 32
SL/VL WIND DIR..N N E E E SW SW SW W W W W
SL/VL WIND SPD..0 0 1 1 1 2 2 2 3 3 3 2
SL/VL WIND GUST.2 2 5 5 5 6 6 6 10 10 10 6
RIDGE WIND DIR..NE NE E E E W W W W W W W
RIDGE WIND SPD..7 7 7 7 7 6 6 6 8 8 8 7
MIX HGT (KFT)...0.5 0.5 0.4 0.4 0.4 2.8 2.8 2.8 3.4 3.4 3.4 3.1
TRANSP WIND DIR.NE NE E E E W W W W W W W
TRANSP WIND SPD.7 7 7 7 7 6 6 6 8 8 8 7
FORECAST DAYS 3 THROUGH 5
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE UPPER 50S. HIGHS IN THE MID 80S. LIGHT
TERRAIN DRIVEN WINDS.
THURSDAY
MOSTLY CLEAR. LOWS IN THE LOWER 60S. HIGHS IN THE MID 80S. LIGHT
TERRAIN DRIVEN WINDS DURING THE DAY WITH INCREASING SOUTHERLY
WINDS OVERNIGHT.
FRIDAY
MOSTLY CLEAR. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER 70S.
BREEZY SOUTHERLY WINDS THROUGH THE EVENING TRANSITIONING TO LIGHT
AND TERRAIN DRIVEN OVERNIGHT.
FORECASTER...SP
REQUESTED BY...RODNEY HART
TYPE OF REQUEST...WILDFIRE
.TAG 2622207.0/STO
.DELDT 09/20/26
.FORMATTERVERSION 2.0.0
.EMAIL RODNEY.HART@FIRE.CA.GOV
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