988
FNUS76 KSGX 122023
FWSSGX
SPOT FORECAST FOR RAINBOW FIRE CENTER TRAINING EXERCISE...CALFIRE
NATIONAL WEATHER SERVICE SAN DIEGO CA
123 PM PDT WED AUG 12 2026
FORECAST IS BASED ON IGNITION TIME OF 1400 PDT ON AUGUST 12.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
GUSTY WEST WINDS AROUND 15 MPH MAY INCREASE TO AROUND 20-22 MPH
NEAR THE MOUNTAIN SLOPE OVER THE NEXT FEW HOURS, AND THEN WEAKEN
BELOW 10 MPH AFTER SUNSET. WINDS SHOULD BE LIGHT AND VARIABLE
OVERNIGHT AND INTO EARLY THURSDAY MORNING. EXCELLENT HUMIDITY
RECOVERY THURSDAY AS CLOUDS INCREASE OVER THE AREA IN THE
MORNING, WITH LIKELY SOME LOCALIZED VISIBILITY REDUCTIONS.
CONDITIONS ARE EXPECTED TO REMAIN CLOUDY THURSDAY AFTERNOON WHICH
WILL HELP KEEP HUMIDITY HIGHER, AROUND 55%, WITH MUCH COOLER
TEMPERATURES FOR THURSDAY AFTERNOON. WINDS WILL FOLLOW A VERY
SIMILAR DIURNAL PATTERN FOR THURSDAY AS THEY DID TODAY, ALTHOUGH
PEAK AFTERNOON WESTERLY WIND GUSTS WILL BE SLIGHTLY WEAKER.
REST OF TODAY
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT).
MAX TEMPERATURE.....AROUND 88.
MIN HUMIDITY........46 PERCENT.
EYE LEVEL WINDS.....SOUTHWEST WINDS 8 TO 9 MPH WITH GUSTS TO AROUND
14 MPH.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 12 TO 13 MPH WITH GUSTS TO
AROUND 20 MPH.
RIDGETOP...........SOUTHWEST AROUND 10 MPH.
CWR.................3 PERCENT.
MIXING HEIGHT.......2100 FT AGL.
TRANSPORT WINDS.....SOUTH 15 TO 17 MPH.
TIME (PDT) 2PM 3PM 4PM 5PM
SKY (%).........47 47 47 60
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............88 87 86 84
RH..............46 46 47 52
20 FT WIND DIR..SW SW SW SW
20 FT WIND SPD..12 12 13 12
20 FT WIND GUST.18 18 20 18
EYE LVL WND DIR.SW SW SW SW
EYE LVL WND SPD.8 9 9 9
EYE LVL WND GST.13 13 14 13
RIDGE WIND DIR..SW SW SW SW
RIDGE WIND SPD..10 10 10 10
CWR.............0 0 0 0
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT) THEN BECOMING
MOSTLY CLOUDY (75-85 PERCENT). PATCHY DENSE FOG
OVERNIGHT.
MIN TEMPERATURE.....AROUND 61.
MAX HUMIDITY........100 PERCENT.
EYE LEVEL WINDS.....SOUTHWEST WINDS UP TO 7 MPH WITH GUSTS TO
AROUND 12 MPH IN THE EVENING BECOMING LIGHT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 9 MPH WITH GUSTS TO AROUND
17 MPH IN THE EVENING BECOMING LIGHT.
RIDGETOP...........SOUTHWEST 5 TO 10 MPH.
CWR.................3 PERCENT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTH 8 TO 17 MPH DECREASING TO 2 TO 6 MPH
OVERNIGHT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........60 60 71 71 71 77 77 77 85 85 85 90
WEATHER COV..... PTY PTY PTY PTY
WEATHER TYPE.... FOG FOG FOG FOG
TSTM COV........
TEMP............80 76 73 70 69 68 67 66 65 64 63 63
RH..............59 67 77 82 85 87 90 93 95 99 100 100
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..10 9 7 6 5 5 3 3 2 2 1 1
20 FT WIND GUST.17 15 12 11 10 9 8 7 6 6 5 4
EYE LVL WND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
EYE LVL WND SPD.7 6 5 4 4 4 3 2 1 1 1 1
EYE LVL WND GST.12 11 9 8 7 7 6 5 5 4 4 3
RIDGE WIND DIR..SW W W W SW SW SW SW SW SW SW SW
RIDGE WIND SPD..10 10 10 10 10 5 5 5 5 5 10 10
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
THURSDAY
SKY/WEATHER.........CLOUDY (85-95 PERCENT). PATCHY DENSE FOG EARLY
IN THE MORNING.
MAX TEMPERATURE.....AROUND 81.
MIN HUMIDITY........57 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING SOUTHWEST UP TO 8 MPH WITH
GUSTS TO AROUND 13 MPH IN THE LATE MORNING AND
AFTERNOON.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 12 MPH EARLY IN THE
MORNING BECOMING LIGHT, THEN BECOMING SOUTHWEST
5 TO 12 MPH WITH GUSTS TO AROUND 18 MPH IN THE
LATE MORNING AND AFTERNOON.
RIDGETOP...........SOUTHWEST 10 TO 15 MPH.
CWR.................1 PERCENT.
MIXING HEIGHT.......2400 FT AGL.
TRANSPORT WINDS.....SOUTH 2 TO 10 MPH SHIFTING TO THE SOUTHWEST 12
TO 15 MPH IN THE AFTERNOON.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........90 90 93 93 93 83 83 83 90 90 90 96
WEATHER COV.....PTY PTY
WEATHER TYPE....FOG FOG
TSTM COV........
TEMP............61 62 64 66 69 72 76 79 80 81 79 77
RH..............100 100 100 99 86 77 66 58 58 57 60 67
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..1 2 2 5 6 7 8 9 10 10 12 10
20 FT WIND GUST.5 5 6 8 10 12 14 15 17 18 18 17
EYE LVL WND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
EYE LVL WND SPD.1 1 2 3 4 4 6 7 7 8 8 7
EYE LVL WND GST.4 4 5 6 7 9 10 11 12 13 13 12
RIDGE WIND DIR..SW SW SW SW S S SW SW SW SW SW SW
RIDGE WIND SPD..10 10 10 10 10 10 15 15 15 15 15 15
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
FORECASTER...SAMANTHA ZUBER
REQUESTED BY...FAE MONTAMBLE
TYPE OF REQUEST...PRESCRIBED
.TAG 2619555.0/SGX
.DELDT 08/12/26
.FORMATTERVERSION 2.0.0
.EMAIL TUCKER.MONTAMBLE@FIRE.CA.GOV
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