755
FNUS76 KPDT 241334
FWSPDT
SPOT FORECAST FOR TRIPLE BUTTE UNIT 4...CONFEDERATED TRIBES OF WARM SPRINGS
NATIONAL WEATHER SERVICE PENDLETON OR
634 AM PDT SAT OCT 24 2026
FORECAST IS BASED ON IGNITION TIME OF 1000 PDT ON OCTOBER 24.
***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.
DISCUSSION
DRY AIR PREVAILING THROUGH TODAY WITH MINIMUM RH
VALUES DOWN TO THE LOW TO MID 20 PERCENT RANGE, WITH IMPROVING
VALUES SUNDAY IN THE LOW TO MID 40 PERCENT RANGE. WINDS WILL
BE MOSTLY LIGHT IN GENERAL WITH TERRAIN DRIVEN DIRECTION AT
TIMES. A DIRECTION FROM THE SOUTHEAST TODAY IS LIKELY WITH A MORE
SOUTHWEST DIRECTION SUNDAY. OTHERWISE, MODERATE TO GOOD OVERNIGHT
RECOVERIES ARE FORECASTED.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....53-58.
MIN HUMIDITY........27-32 PERCENT.
WIND (20 FT)........LIGHT WINDS WITH TERRAIN DRIVEN DIRECTION
AT TIMES.
RIDGETOP WIND.......LIGHT WINDS.
MIXING HEIGHT.......1900 FT AGL.
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
VENTILATION INDEX...LOW (80) IN THE AFTERNOON.
TIME (PDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............39 43 46 50 52 53 53 51 48 44 41 40
RH..............62 51 47 41 36 35 37 43 51 53 54 54
20 FT WIND DIR..N SE SE SE SE SE SE SE N N N N
20 FT WIND SPD..2 4 4 4 4 4 3 3 2 2 2 2
20 FT WIND GUST.5 5 5 7 7 7 5 4
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....32-37.
MAX HUMIDITY........55-60 PERCENT.
WIND (20 FT)........LIGHT WINDS WITH TERRAIN DRIVEN DIRECTION
AT TIMES.
RIDGETOP WIND.......LIGHT WINDS.
MIXING HEIGHT.......600 FT AGL EARLY IN THE EVENING THEN 500 FT AGL
LATE IN THE EVENING.
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH SHIFTING TO THE SOUTHWEST 5
TO 10 MPH LATE IN THE EVENING.
VENTILATION INDEX...LOW (30).
SUNDAY
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS LATE IN THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.1 PERCENT.
MAX TEMPERATURE.....52-57.
MIN HUMIDITY........40-45 PERCENT.
WIND (20 FT)........LIGHT WINDS WITH TERRAIN DRIVEN DIRECTION
AT TIMES.
RIDGETOP WIND.......LIGHT WINDS.
MIXING HEIGHT.......3400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 7 TO 12 MPH BECOMING LIGHT.
VENTILATION INDEX...LOW (40) INCREASING TO MODERATE (290) IN THE
AFTERNOON.
FORECASTER...DAY
REQUESTED BY...JEFFREY CASEY
TYPE OF REQUEST...PRESCRIBED
.TAG 2624464.0/PDT
.DELDT 10/24/26
.FORMATTERVERSION 2.0.0
.EMAIL JEFF.CASEY@CTWSBNR.ORG
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