300
FNUS76 KPDT 091740
FWSPDT
SPOT FORECAST FOR WAPTUS LAKE...CWICC
NATIONAL WEATHER SERVICE PENDLETON OR
1040 AM PDT TUE SEP 9 2025
FORECAST IS BASED ON FORECAST START TIME OF 1000 PDT ON SEPTEMBER 09.
***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 THE
TRANSPORT WIND MULTIPLIED BY THE MIXING
HEIGHT IN 100'S OF FEET. INDEX CATEGORIES
ARE A GENERALIZED INDICATOR ONLY.***
IF YOU HAVE QUESTIONS OR CONCERNS WITH THIS FORECAST, PLEASE
CONTACT OUR OFFICE AT (541) 276-8134.
DISCUSSION
UNSETTLED WEATHER THE NEXT 30 HOURS WITH LOW STORM
CHANCES TODAY AND TOMORROW AFTERNOON/EVENING. ELEVATED DAYTIME RH
AND HIGH OVERNIGHT RECOVERY ANTICIPATE AT THE INCIDENT. WINDS
LARGELY SHELTERED WITHIN THE COMPLEX TERRAIN; FORECAST AN INCREASE
IN SPEED IN THE AFTERNOON OUT OF THE NORTHWEST BUT UNDER 10 MPH.
WHILE BEST STORM CHANCES ARE SOUTH AND NORTH OF THE FIRE, RISK
FOR STORMS EXIST WITH EMPHASIS ON LIGHTNING, BRIEF DOWNPOURS, AND
GUSTY WINDS FROM DEVELOPING OR APPROACHING STORMS.
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
PARTLY SUNNY (40-50 PERCENT). SCATTERED RAIN
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS
THROUGH LATE IN THE MORNING. RAIN SHOWERS
LIKELY (60%) AND CHANCE OF THUNDERSTORMS IN
THE AFTERNOON.
CWR.................25 PERCENT.
CHANCE OF LIGHTNING.15 PERCENT INCREASING TO 30 PERCENT AFTER
NOON. MAX TEMPERATURE.....AROUND 67. MIN HUMIDITY........53-58
PERCENT. WIND (20 FT)........LIGHT AND VARIABLE WINDS 2 TO 4 MPH
BECOMING NORTHWEST 5 TO 8 MPH BY LATE IN THE MORNING. GUSTY AND
ERRATIC WINDS EXPECTED NEAR ANY THUNDERSTORMS. RIDGETOP
WIND.......NORTHWEST WINDS 5 TO 8 MPH. MIXING HEIGHT.......3300 FT
AGL. TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH. VENTILATION
INDEX...POOR (190).
TIME (PDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM
CHC OF LTNG (%).10 20 20 20 30 30 30 20 20 20 10 10
TEMP............54 57 60 64 66 66 67 65 63 60 56 55
RH..............78 71 67 60 56 56 59 63 71 79 84 80
20 FT WIND DIR..W NW NW NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..3 3 4 4 5 5 5 6 6 6 5 5
20 FT WIND GUST. 8 8 8 6 6
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (40-50 PERCENT). CHANCE OF RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS
IN THE EVENING. SLIGHT CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT (DROPPING UNDER 15%).
CWR.................5 PERCENT.
CHANCE OF LIGHTNING.19 PERCENT.
MIN TEMPERATURE.....51-54.
MAX HUMIDITY........80-90 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 4 TO 7 MPH IN THE EVENING AND
OVERNIGHT BECOMING LIGHT DRAINAGE WINDS 1 TO 3 MPH. GUSTY AND
ERRATIC WINDS EXPECTED NEAR ANY THUNDERSTORMS. RIDGETOP
WIND.......NORTHWEST WIND AROUND 5 MPH BECOMING NORTH BY 5 AM.
MIXING HEIGHT.......250 FT AGL. TRANSPORT WINDS.....NORTH 3 TO 6
MPH. VENTILATION INDEX...POOR (60-100).
WEDNESDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). CHANCE OF RAIN SHOWERS
AND A SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
CWR.................5 PERCENT INCREASING TO 20 PERCENT BY LATE IN THE
MORNING.
CHANCE OF LIGHTNING.19 PERCENT.
MAX TEMPERATURE.....67-69.
MIN HUMIDITY........52-57 PERCENT.
WIND (20 FT)........LIGHT 1 TO 3 MPH BECOMING NORTHWEST 5 TO 8 MPH LATE
IN THE AFTERNOON. GUSTY AND ERRATIC WINDS
EXPECTED NEAR ANY THUNDERSTORMS.
RIDGETOP WIND.......NORTH AROUND 5 MPH BECOMING NORTHWEST 5 TO 8 MPH
BY EARLY AFTERNOON.
MIXING HEIGHT.......3700 FT AGL.
TRANSPORT WINDS.....NORTH 6 TO 8 MPH.
VENTILATION INDEX...POOR (60 INCREASING TO 160 IN THE
AFTERNOON).
FORECASTER...TOWNSEND
REQUESTED BY...LUIS SIERRA
TYPE OF REQUEST...WILDFIRE
.TAG 2521637.0/PDT
.DELDT 09/09/25
.FORMATTERVERSION 2.0.0
.EMAIL CACWC@FIRENET.GOV
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