554
FNUS76 KLOX 152320
FWSLOX
SPOT FORECAST FOR GIFFORD FIRE...USFS
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
420 PM PDT MON SEP 15 2025
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
THE WARMING TREND REMAINS ON TRACK THROUGH WEDNESDAY, WITH A COOL
DOWN EXPECTED ON THURSDAY AND FRIDAY. WINDS WILL CONTINUE TO BE
LOCALLY GUSTY AND WESTERLY EACH AFTERNOON TO EVENING, WITH EASTERLY
WINDS DURING EACH OVERNIGHT PERIOD. HUMIDITIES WILL LOWER DURING THE
PEAK OF THE HEAT ON TUESDAY AND WEDNESDAY, WITH BOTH MINIMUM
HUMIDITIES AND OVERNIGHT RECOVERIES DECREASING THROUGH THE SPOT
FORECAST PERIOD.
LOOKING OUT PAST THE SPOT FORECAST PERIOD: REMNANT MOISTURE AND
INSTABILITY FROM TROPICAL SYSTEM MARIO (CURRENTLY LOCATED OFF THE
COAST OF SOUTHERN BAJA) WILL MOVE INTO SOUTHERN CALIFORNIA BETWEEN
WEDNESDAY AND FRIDAY. WITH THE LEADING EDGE OF THE MOISTURE SURGE,
THERE COULD BE AREAS OF DRIER THUNDERSTORMS ON WEDNESDAY, WITH A
HIGHER PROBABILITY OF WETTING STORMS THURSDAY INTO FRIDAY AS DEEPER
MOISTURE IS EXPECTED TO ESTABLISH. THERE IS STILL CONSIDERABLE
UNCERTAINTY HOW MUCH RAINFALL AND LIGHTNING ACTIVITY WILL IMPACT THE
GIFFORD FIRE BURN SCAR DURING THIS PERIOD, BUT THE HIGHEST CHANCES
ARE WEDNESDAY NIGHT THROUGH THURSDAY NIGHT AT THIS TIME. ANY
THUNDERSTORM THAT FORMS MAY PRODUCE STRONG GUSTY/ERRATIC WINDS,
LIGHTNING, AND BRIEF HEAVY RAINFALL (THOUGH LEANING TOWARD MINIMAL
RISK FOR DEBRIS FLOWS AT THIS TIME).
TONIGHT
SKY/WEATHER.........CLEAR (0-5 PERCENT).
MIN TEMPERATURE.....52-62 EXCEPT 62-70 HIGHER ELEVATIONS.
MAX HUMIDITY........50-60 PERCENT EXCEPT 35-45 PERCENT HIGHER
ELEVATIONS AND EASTERN PORTION.
EYE LEVEL WINDS.....SOUTHWEST WINDS 4-6 MPH, BECOMING EAST 2-5
MPH AFTER MIDNIGHT.
WIND (20 FT)........SOUTHWEST WINDS 6-12 MPH, BECOMING EAST 5-10
MPH AFTER MIDNIGHT.
RIDGETOP WIND.......SOUTHWEST WINDS 10-15 MPH, BECOMING EAST 7-12
MPH AFTER MIDNIGHT.
MIXING HEIGHT.......2500-4000 FT AGL WESTERN PORTION AND 5500-7500 FT
AGL EASTERN PORTION, BECOMING 1000-1500 FT AGL.
TRANSPORT WINDS.....WEST TO NORTHWEST 5 MPH, BECOMING EAST 5 MPH.
TUESDAY
SKY/WEATHER.........SUNNY (0-5 PERCENT).
MAX TEMPERATURE.....90-100.
MIN HUMIDITY........15-25 PERCENT.
EYE LEVEL WINDS.....SOUTHEAST WINDS 2-5 MPH, BECOMING WEST
3-6 MPH IN THE AFTERNOON.
WIND (20 FT)........SOUTHEAST WINDS 5-10 MPH, BECOMING WEST
7-12 MPH WITH GUSTS TO 15 MPH IN THE AFTERNOON.
RIDGETOP WIND.......SOUTHEAST WINDS 7-12 MPH, BECOMING WEST
10-15 MPH IN THE AFTERNOON.
MIXING HEIGHT.......1000-1500 FT AGL, BECOMING 4000-7000 FT AGL
WESTERN PORTION AND 7000-10000 FT AGL
EASTERN PORTION.
TRANSPORT WINDS.....EAST 5 MPH, BECOMING WEST 5 MPH.
TUESDAY NIGHT
SKY/WEATHER.........CLEAR (0-5 PERCENT).
MIN TEMPERATURE.....52-63 EXCEPT 63-72 HIGHER ELEVATIONS.
MAX HUMIDITY........50-60 PERCENT EXCEPT 35-45 PERCENT HIGHER
ELEVATIONS AND EASTERN PORTION.
EYE LEVEL WINDS.....WEST WINDS 3-6 MPH IN THE EVENING, BECOMING
NORTHEAST 2-5 MPH.
WIND (20 FT)........WEST WINDS 7-12 MPH WITH GUSTS TO 15 MPH
IN THE EVENING, BECOMING NORTHEAST 5-10 MPH.
RIDGETOP WIND.......WEST WINDS 10-15 MPH IN THE EVENING, BECOMING
NORTHEAST 5-10 MPH WITH GUSTS TO 15 MPH.
MIXING HEIGHT.......4000-7000 FT AGL WESTERN PORTION AND
7000-10000 FT AGL EASTERN PORTION,
BECOMING 1000-1500 FT AGL.
TRANSPORT WINDS.....WEST AROUND 5 MPH.
FORECASTER...LUND
REQUESTED BY...JACOB SLATER
TYPE OF REQUEST...WILDFIRE
.TAG 2521683.1/LOX
.DELDT 09/12/25
.FORMATTERVERSION 2.0.0
.EMAIL ALYSSA.THORNBURG@USDA.GOV,RODOLFO.URIBE@USDA.GOV,JACOB.SLATER@USDA.GOV,TRACY.DOTT@USDA.GOV,ERIC.HARRIS2@USDA.GOV
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