622
FNUS76 KPDT 072148
FWSPDT
SPOT FORECAST FOR DEER 123 C...USFS
NATIONAL WEATHER SERVICE PENDLETON OR
248 PM PDT TUE OCT 7 2025
FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON OCTOBER 08.
***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
EXCELLENT (75-85%) OVERNIGHT HUMIDITY RECOVERIES
EXPECTED WEDNESDAY MORNING AS A WEAK INVERSION BREAKS BETWEEN
0800 AND 0900. A WEAK COLD FRONT WILL STALL WEST OF THE FIRE AREA
THROUGH THE PERIOD, KEEPING CONDITIONS SLIGHTLY WARMING AND
DRYING AS AFTERNOON HUMIDITIES APPROACH THE UPPER TEENS. WINDS
WILL BE PREDOMINATELY TERRAIN DRIVEN, BUT HIGHER ELEVATIONS MAY
EXPERIENCE MORE INFLUENCE FROM GENERAL SOUTH WINDS ASSOCIATED WITH
THE STALLED FRONT. SOUTH FLOW ALOFT KEEPS OVERNIGHT RECOVERIES
GOOD AS RAIN CHANCES (15-25%) MATERIALIZE THURSDAY NIGHT INTO
FRIDAY.
WEDNESDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT). AREAS OF FROST LATE IN
THE MORNING.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.2 PERCENT.
MAX TEMPERATURE.....66-69.
MIN HUMIDITY........20-25 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 6 TO 12 MPH WITH GUSTS UP TO
20 MPH, PEAKING BETWEEN 1300 AND 1700.
RIDGETOP WIND.......SOUTH WINDS 7 TO 14 MPH WITH GUSTS UP TO
24 MPH, PEAKING BETWEEN 1300 AND 1700.
MIXING HEIGHT.......7200 FT AGL.
TRANSPORT WINDS.....SOUTH 7 TO 15 MPH INCREASING TO 15 TO 23 MPH
LATE IN THE AFTERNOON.
VENTILATION INDEX...EXCELLENT (950) IN THE AFTERNOON.
TIME (MDT) NOON 2 PM 4 PM 6 PM 8 PM 10 PM
CHC OF LTNG (%).0 0 0 0 0 0
TEMP............56 63 65 63 55 46
RH..............35 27 24 27 37 48
20 FT WIND......SE 6 SE 10 SE 11 SE 6 ENE 3 NE 3
20 FT WIND GUST.12 18 18 15 8 6
WEDNESDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.2 PERCENT.
MIN TEMPERATURE.....32-37.
MAX HUMIDITY........75-80 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 6 TO 12 MPH WITH GUSTS UP TO
20 MPH BECOMING NORTHEAST 2 TO 5 MPH AFTER 1900.
RIDGETOP WIND.......SOUTH WINDS 7 TO 14 MPH WITH GUSTS UP TO 24 MPH
BECOMING EAST 3 TO 6 MPH AFTER 1900.
MIXING HEIGHT.......1300 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 15 MPH SHIFTING TO THE SOUTHEAST 5
TO 8 MPH EARLY IN THE EVENING.
VENTILATION INDEX...POOR (180) DECREASING TO POOR (90) OVERNIGHT.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........19-24 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 2 TO 5 MPH BECOMING SOUTHEAST
5 TO 10 MPH WITH GUSTS UP TO 16 MPH AFTER 1000,
PEAKING BETWEEN 1300 AND 1700.
RIDGETOP WIND.......EAST WINDS 3 TO 6 MPH BECOMING SOUTHEAST 6 TO
12 MPH WITH GUSTS UP TO 18 MPH AFTER 1000,
PEAKING BETWEEN 1300 AND 1700.
MIXING HEIGHT.......7400 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 7 TO 8 MPH INCREASING TO SOUTH 16 TO
22 MPH LATE IN THE MORNING.
VENTILATION INDEX...POOR (80) INCREASING TO EXCELLENT (990) IN THE
AFTERNOON.
FORECASTER...CALLIHAN
REQUESTED BY...KIRA SANTULLI
TYPE OF REQUEST...PRESCRIBED
.TAG 2523117.0/PDT
.DELDT 10/07/25
.FORMATTERVERSION 2.0.0
.EMAIL KIRA.SANTULLI@USDA.GOV,BRETT.JOHNSON@USDA.GOV
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