098
FNUS76 KPDT 152259
FWSPDT
SPOT FORECAST FOR ORBMC INC 276...WALLA WALLA EM
NATIONAL WEATHER SERVICE PENDLETON OR
359 PM PDT WED JUL 15 2026
FORECAST IS BASED ON FORECAST START TIME OF 1600 PDT ON JULY 15.
***THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS ***
***WINDS ARE 20 FOOT 10-MINUTE AVERAGES ***
***CWR: CHANCE OF WETTING RAIN 0.10 OR GREATER ***
***VENTILATION INDEX IS DERIVED FROM TRANSPORT WIND
MULTIPLIED BY THE MIXING HEIGHT IN 100'S OF FT.
CATEGORIES ARE A GENERALIZED INDICATOR ONLY:
LOW (< 200), MODERATE (200-500), HIGH (500-700),
AND VERY HIGH (> 700). ***
IF YOU HAVE QUESTIONS OR CONCERNS WITH THIS FORECAST, PLEASE
CONTACT OUR OFFICE AT (541) 276-8134.
..RED FLAG WARNING IN EFFECT UNTIL 5 AM PDT THURSDAY
..HEAT ADVISORY IN EFFECT UNTIL 9 PM PDT THURSDAY
DISCUSSION
A THREAT OF STORMS WITH STORMS DEVELOPING OR MOVING
IN FROM THE SOUTHERN BLUES WITH THE MAIN WINDOW OF CONCERN
1700-2300 LATE TODAY CAPABLE OF GUSTY WINDS OVER 35 MPH. NORTH
WINDS WILL PREVAIL TODAY UNTIL A SHIFT TO SOUTH WINDS LATE
TONIGHT/SMALL HOURS. ANOTHER WINDOW FOR STORMS TOMORROW BEGINNING
AT 1400 WITH THE THREATS OF LIGHTNING, SMALL HAIL, AND GUSTY
WINDS. SLIGHTLY HIGHER AFTERNOON HUMIDITY TOMORROW IN TANDEM WITH
INCREASING WEST WINDS AFTERNOON-EVENING.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS LATE IN THE
AFTERNOON AFTER
CWR.................10 PERCENT.
CHANCE OF LIGHTNING.20 PERCENT.
MAX TEMPERATURE.....98-100.
MIN HUMIDITY........17-22 PERCENT.
WIND (20 FT)........NORTH WINDS 7 TO 13 MPH WITH OCCASIONAL GUSTS
UP TO 20 MPH. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS LATE IN THE AFTERNOON.
MIXING HEIGHT.......8000 FT AGL.
TRANSPORT WINDS.....NORTHEAST 12 TO 13 MPH.
VENTILATION INDEX...
TIME (PDT) 4 PM 6 PM 8 PM 10 PM MIDNGT 2 AM
CHC OF LTNG (%).20 10 10 10 20 20
TEMP............98 99 94 76 75 71
RH..............21 20 24 38 39 42
20 FT WIND......N 12 N 12 NE 11 SE 10 SE 8 S 8
20 FT WIND GUST.20 20 16
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS LATE IN THE EVENING.
CWR.................10 PERCENT.
CHANCE OF LIGHTNING.20 PERCENT.
MIN TEMPERATURE.....64-67.
MAX HUMIDITY........49-54 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 6 TO 12 MPH SHIFTING TO THE
SOUTHEAST 5 TO 10 MPH IN THE LATE EVENING
AND OVERNIGHT, SHIFTING TO THE SOUTH EARLY
IN THE MORNING. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH SHIFTING TO THE SOUTH
AROUND 10 MPH OVERNIGHT.
VENTILATION INDEX...MODERATE (350) DECREASING TO LOW
(40) OVERNIGHT.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS, MAINLY AFTER 1400.
CWR.................5 PERCENT.
CHANCE OF LIGHTNING.15 PERCENT.
MAX TEMPERATURE.....AROUND 100.
MIN HUMIDITY........25-30 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 8 MPH SHIFTING TO THE
NORTHWEST 8 TO 12 MPH IN THE AFTERNOON. GUSTY AND
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS.
MIXING HEIGHT.......4800 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 9 TO 10 MPH SHIFTING TO THE WEST 9 TO 13 MPH
LATE IN THE AFTERNOON.
VENTILATION INDEX...MODERATE (290).
FORECASTER...TOWNSEND
REQUESTED BY...CHRIS LEE
TYPE OF REQUEST...WILDFIRE
.TAG 2617432.0/PDT
.DELDT 07/15/26
.FORMATTERVERSION 2.0.0
.EMAIL CLEE@WWCOWA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page