726
FNUS76 KSGX 210459
FWSSGX
SPOT FORECAST FOR CHIA...CALFIRE RIVERSIDE
NATIONAL WEATHER SERVICE SAN DIEGO CA
959 PM PDT THU AUG 20 2026
FORECAST IS BASED ON FORECAST START TIME OF 2200 PDT ON AUGUST 20.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WARM, FAIRLY TYPICAL WEATHER GOING INTO THE WEEKEND. WEAK,
VARIABLE WINDS OVERNIGHT INTO THE MORNING WILL GIVE WAY TO WEST TO
WEST-NORTHWEST BREEZES IN THE AFTERNOONS TYPICALLY AFTER 1100
PDT. POOR TO MODERATE AFTERNOON HUMIDITY IN THE 20-30% RANGE WITH
MODERATE TO GOOD OVERNIGHT RECOVER.
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (PATCHY UPPER LVL CLOUDS).
MIN TEMPERATURE.....AROUND 69 DEGREES.
MAX HUMIDITY........62 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS.
RIDGETOP...........SOUTHWEST 5 TO 10 MPH.
CWR.................2 PERCENT.
MIXING HEIGHT.......DECREASING TO 100 FT AGL.
TRANSPORT WINDS.....EAST 1 TO 5 MPH.
TIME (PDT) 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........41 35 35 35 14 14 14 8
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............77 74 72 71 70 69 69 70
RH..............51 56 58 61 62 62 62 60
20 FT WIND DIR..N N N N N E E E
20 FT WIND SPD..0 0 0 0 0 1 1 1
20 FT WIND GUST. 1 4 4
EYE LVL WND DIR.N N N N E E E E
EYE LVL WND SPD.0 0 0 0 1 1 1 1
EYE LVL WND GST. 3 3
RIDGE WIND DIR..SW S SW SW S SW SW S
RIDGE WIND SPD..5 5 5 5 5 5 5 10
CWR.............0 0 0 0 0 0 0 0
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY BECOMING PARTLY CLOUDY.
MAX TEMPERATURE.....AROUND 95 DEGREES.
MIN HUMIDITY........29 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING WEST 3 TO 6 MPH WITH
GUSTS TO AROUND 10 MPH LATE IN THE MORNING.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING WEST 5 TO 8 MPH WITH GUSTS
TO AROUND 14 MPH LATE IN THE MORNING.
RIDGETOP...........SOUTH 5 TO 10 MPH.
CWR.................1 PERCENT.
MIXING HEIGHT.......INCREASING TO 4700 FT AGL.
TRANSPORT WINDS.....EAST 1 TO 3 MPH SHIFTING TO THE WEST 1 TO 10
MPH IN THE LATE MORNING AND AFTERNOON.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........8 8 13 13 13 31 31 31 37 37 37 61
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............69 72 81 86 88 91 92 94 94 94 94 92
RH..............59 55 42 37 35 33 32 30 29 29 29 31
20 FT WIND DIR..E E E W W W W W W W W W
20 FT WIND SPD..1 1 1 1 3 5 6 7 8 8 8 8
20 FT WIND GUST.4 4 4 7 10 11 13 14 14 14 13
EYE LVL WND DIR.E E E W W W W W W W W W
EYE LVL WND SPD.1 1 1 1 2 4 4 5 6 6 6 5
EYE LVL WND GST.3 3 3 5 7 8 9 10 10 10 9
RIDGE WIND DIR..SW SW S S S S S S S W SW SW
RIDGE WIND SPD..5 5 10 5 5 10 5 5 5 5 5 5
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
FRIDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY.
MIN TEMPERATURE.....AROUND 69 DEGREES.
MAX HUMIDITY........54 PERCENT.
EYE LEVEL WINDS.....NORTHWEST WINDS AROUND 4 MPH EARLY IN THE
EVENING BECOMING LIGHT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS AROUND 5 MPH EARLY IN THE
EVENING BECOMING LIGHT.
RIDGETOP...........WEST AROUND 10 MPH BECOMING 5 TO 10 MPH LATE IN
THE EVENING.
CWR.................1 PERCENT.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH SHIFTING TO THE NORTHEAST
AROUND 3 MPH OVERNIGHT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........61 61 57 57 57 11 11 11 6 6 6 7
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............90 87 82 80 77 74 72 70 69 69 69 70
RH..............32 35 40 43 46 49 50 52 54 53 53 52
20 FT WIND DIR..NW NW NW N N NE NE E E N N E
20 FT WIND SPD..5 2 1 1 1 1 1 1 1 0 0 1
20 FT WIND GUST.10 6 4 4 4 1 1
EYE LVL WND DIR.NW NW NW N N NE NE E E E E E
EYE LVL WND SPD.4 1 1 1 1 1 1 1 1 1 1 1
EYE LVL WND GST.7 4 3 3 3
RIDGE WIND DIR..W W SW W W SW W W SW W W SW
RIDGE WIND SPD..10 10 10 10 10 5 10 10 5 10 10 5
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....AROUND 96 DEGREES.
MIN HUMIDITY........26 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING WEST 4 TO 6 MPH WITH
GUSTS TO AROUND 11 MPH LATE IN THE MORNING.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING WEST 6 TO 8 MPH WITH GUSTS
TO AROUND 15 MPH LATE IN THE MORNING.
RIDGETOP...........SOUTHWEST AROUND 5 MPH SHIFTING TO THE WEST 5
TO 10 MPH LATE IN THE AFTERNOON.
CWR.................1 PERCENT.
MIXING HEIGHT.......INCREASING TO 5900 FT AGL.
TRANSPORT WINDS.....EAST 1 TO 3 MPH SHIFTING TO THE WEST 10 TO 15 MPH.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........7 7 8 8 8 9 9 9 2 2 2 7
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............70 72 80 85 86 89 91 95 93 95 95 92
RH..............51 49 39 34 34 32 31 26 27 26 26 30
20 FT WIND DIR..E E NE W W W W W W W W W
20 FT WIND SPD..1 1 1 2 3 6 6 7 8 8 8 8
20 FT WIND GUST. 4 6 8 10 11 12 14 15 15 13
EYE LVL WND DIR.E E NE W W W W W W W W W
EYE LVL WND SPD.1 1 1 1 3 4 4 5 6 6 6 6
EYE LVL WND GST. 3 4 6 7 8 9 10 11 11 9
RIDGE WIND DIR..W W W W W SW S S SW W W W
RIDGE WIND SPD..5 5 5 5 5 0 0 0 5 5 5 10
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
FORECASTER...CHANDLER PRICE
REQUESTED BY...DUTY OFFICER
TYPE OF REQUEST...WILDFIRE
.TAG 2620155.0/SGX
.DELDT 08/20/26
.FORMATTERVERSION 2.0.0
.EMAIL RRUECCCAPTAINS@FIRE.CA.GOV
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