225
FNUS76 KSEW 262204
FWSSEW
SPOT FORECAST FOR BACKBONE FIRE...IIMT-AUS/NZ IMT #3
NATIONAL WEATHER SERVICE SEATTLE WA
304 PM PDT WED AUG 26 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 PDT ON AUGUST 27.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE AT (206) 526-6095, IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
ONSHORE FLOW AND COOLER CONDITIONS WILL PERSIST
THROUGH THE PERIOD, BRINGING INCREASING RELATIVE HUMIDITIES
THROUGH THURSDAY AS MARINE AIR EDGES FURTHER INTO THE MOUNTAINS.
WINDS GENERALLY OUT OF THE WEST, BECOMING BREEZY ON THURSDAY
AFTERNOON AS AN UPPER-TROUGH PROGRESSES ACROSS THE REGION WHILE
BRINGING A SLIGHT CHANCE OF ISOLATED THUNDERSTORMS TO THE
INCIDENT. LITTLE RAIN IS EXPECTED WITH ANY THUNDERSTORMS, BUT
COULD PRODUCE ERRATIC, GUSTY WINDS.
THURSDAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
SUNNY (20-30 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.14 PERCENT.
MAX TEMPERATURE.....AROUND 71.
MIN HUMIDITY........57 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 8 MPH.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 13 MPH.
RAINFALL AMOUNT.....0.00 INCHES.
CEILING (KFT).......1.1 INCREASING TO 25 IN THE AFTERNOON.
VISIBILITY..........7.
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.7 PERCENT.
MIN TEMPERATURE.....AROUND 53.
MAX HUMIDITY........92 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6
TO 8 MPH IN THE EVENING BECOMING LIGHT DOWNSLOPE.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 6 MPH.
RAINFALL AMOUNT.....0.00 INCHES.
CEILING (KFT).......25 DECREASING TO 3 IN THE MORNING.
VISIBILITY..........7 DECREASING TO 4.
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
SUNNY (5-15 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 71.
MIN HUMIDITY........56 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING WEST 5 TO 7 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......3300 FT AGL.
TRANSPORT WINDS.....WEST AROUND 7 MPH.
RAINFALL AMOUNT.....0.00 INCHES.
CEILING (KFT).......3 INCREASING TO 25 IN THE AFTERNOON.
VISIBILITY..........6.
FORECASTER...BOWER
REQUESTED BY...SITUATION UNIT LEADER
TYPE OF REQUEST...WILDFIRE
.TAG 2619416.18/SEW
.DELDT 08/26/26
.FORMATTERVERSION 2.0.0
.EMAIL JORDAN_JOBSON@FIRENET.GOV,2026.BACKBONE.PLANS@FIRENET.GOV
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