049
FNUS76 KEKA 180502
FWSEKA
SPOT FORECAST FOR PEAK FIRE...USFS; SHASTA TRINITY NF
NATIONAL WEATHER SERVICE EUREKA CA
1002 PM PDT WED SEP 17 2025
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
IF YOU HAVE QUESTIONS OR CONCERNS REGARDING THIS FORECAST, PLEASE
CONTACT OUR OFFICE AT (707) 443-6484
PLEASE DO NOT RESPOND DIRECTLY IF YOU HAVE RECEIVED THIS IN AN EMAIL.
DISCUSSION
A REMNANT TROPICAL SYSTEM WILL BEGIN PUSHING
MOISTURE IN FROM THE SOUTH INTO THURSDAY MORNING. SHOWERS WILL
MOVE IN THURSDAY WITH A SLIGHT CHANCE FOR THUNDERSTORMS (10-15%)
FOR MAINLY MENDOCINO, LAKE AND SOUTHERN TRINITY COUNTIES THROUGH
THURSDAY AFTERNOON. THESE INITIAL STORMS WOULD BE MORE DRY IN
NATURE, BUT CONFIDENCE IS LOW ON AVAILABLE INSTABILITY AT THAT
TIME. MOISTURE AND INSTABILITY INCREASE LATE THURSDAY AND FRIDAY
WHEN BETTER CONFIDENCE FOR ISOLATED THUNDERSTORMS AND A POTENTIAL
(45%) FOR WETTING RAINFALL FROM SHOWERS AND MORE RAIN-PRODUCING
THUNDERSTORMS. THUNDERSTORM FORMATION FRIDAY WILL BE SOMEWHAT
DEPENDENT ON HOW MUCH CLEARING CAN OCCUR THROUGH THE AFTERNOON.
SHOWER AND THUNDERSTORM CHANCES CONTINUE THROUGH SATURDAY FOR
MAINLY TRINITY COUNTY.
THURSDAY
SKY/WEATHER.........MOSTLY CLOUDY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 86.
MIN HUMIDITY........23 PERCENT.
WIND (20 FT)........VARIABLE 2 TO 4 MPH...BECOMING SOUTH 5 TO 6 MPH
IN THE AFTERNOON.
MIXING HEIGHT.......900-1200 FT AGL INCREASING TO 4100 FT AGL LATE
IN THE MORNING, THEN INCREASING TO 6200 FT AGL
EARLY IN THE AFTERNOON DECREASING TO 3700 FT
AGL LATE IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 6 MPH.
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN IN THE
EVENING, THEN SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT.
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 57.
MAX HUMIDITY........64 PERCENT.
WIND (20 FT)........VARIABLE 1 TO 3 MPH.
MIXING HEIGHT.......3700 FT AGL DECREASING TO 800-900 FT AGL EARLY
IN THE EVENING.
TRANSPORT WINDS.....SOUTHEAST AROUND 4 MPH.
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS IN
THE MORNING. ISOLATED THUNDERSTORMS THROUGH THE
DAY. CHANCE OF RAIN SHOWERS IN THE AFTERNOON.
CWR.................6 PERCENT.
MAX TEMPERATURE.....AROUND 77.
MIN HUMIDITY........41 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 5 TO 8 MPH. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS.
MIXING HEIGHT.......900-1900 FT AGL INCREASING TO 2200-3500 FT AGL
EARLY IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHEAST AROUND 6 MPH.
FORECASTER...JOHNATHON WHITE
REQUESTED BY...NATHAN ULRICH
TYPE OF REQUEST...WILDFIRE
.TAG 2520835.2/EKA
.DELDT 09/17/25
.EMAIL NATHAN.ULRICH@USDA.GOV,ADAM.KOELLER@USADA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page