409
FNUS76 KPDT 062126
FWSPDT
SPOT FORECAST FOR LITTLE DEAN 13D...USFS
NATIONAL WEATHER SERVICE PENDLETON OR
226 PM PDT MON APR 6 2026
FORECAST IS BASED ON IGNITION TIME OF 1800 MDT ON APRIL 06.
***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
A SLIGHT CHANCE OF ISOLATED THUNDERSTORMS WILL BE
POSSIBLE THROUGH THIS EVENING, WITH GUSTY OUTFLOW WINDS POTENTIALLY
IMPACTING THE FIRE SITE. TOMORROW, A COLD FRONT PASSAGE WILL BRING
INCREASING WEST WINDS THAT WILL SHIFT BRIEFLY TO THE NORTHWEST
AROUND 5PM WHEN THE FRONTAL BOUNDARY PASSES OVERHEAD. WINDS WILL
DECREASE THROUGH THE EVENING, WITH A RETURN TO LIGHT WINDS TUESDAY
NIGHT. COLD FRONT WILL BE DRY, RESULTING IN AFTERNOON RHS TOMORROW IN
THE LOWER 20S, AND IN THE UPPER TEENS WEDNESDAY AFTERNOON. AFTERNOON
RECOVERS WILL BE FAIR TO GOOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING
PARTLY CLOUDY (30-40 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING.
CWR.................12 PERCENT DECREASING TO 1 PERCENT LATE IN THE
EVENING.
CHANCE OF LIGHTNING.15 PERCENT.
MIN TEMPERATURE.....40-43.
MAX HUMIDITY........66-71 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 5 TO 8 MPH SHIFTING TO THE
NORTHWEST AROUND 8PM, THEN SHIFTING
TO THE WEST AFTER 11PM. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE EVENING.
RIDGETOP WIND.......NORTHWEST WINDS 5 TO 8 MPH SHIFTING TO THE WEST
AFTER 11PM.
MIXING HEIGHT.......9200 FT AGL EARLY IN THE EVENING.
TRANSPORT WINDS.....WEST 8 TO 10 MPH.
VENTILATION INDEX...POOR (40) DECREASING TO POOR (30) OVERNIGHT.
TIME (MDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM
CHC OF LTNG (%).20 20 20 0 0 0
TEMP............60 53 49 47 44 42
RH..............39 53 63 64 66 66
20 FT WIND......SE 7 NW 5 N 6 W 7 W 8 W 8
20 FT WIND GUST.10 6 7 8 10 12
TUESDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....59-62.
MIN HUMIDITY........20-25 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 10 INCREASING TO 12 TO 18 MPH
WITH GUSTS TO AROUND 27 MPH AFTER 11AM.
RIDGETOP WIND.......WEST WINDS 5 TO 10 MPH INCREASING TO
15 TO 21 MPH WITH GUSTS UP TO 32 MPH AFTER 11AM.
MIXING HEIGHT.......6400 FT AGL IN THE LATE MORNING AND AFTERNOON.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH INCREASING TO WEST
AROUND 25 MPH IN THE LATE MORNING AND
AFTERNOON.
VENTILATION INDEX...POOR (80) INCREASING TO EXCELLENT (1050) IN THE
AFTERNOON.
TUESDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....31-34.
MAX HUMIDITY........56-61 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 11 TO 17 MPH WITH GUSTS TO
AROUND 23 MPH DECREASING TO 5 TO 10 MPH AROUND
8PM.
RIDGETOP WIND.......NORTHWEST WINDS 15 TO 20 MPH WITH GUSTS UP TO
30 MPH SHIFTING TO THE NORTH 5 TO 10 MPH AFTER
8 PM.
MIXING HEIGHT.......6400 FT AGL EARLY IN THE EVENING.
TRANSPORT WINDS.....WEST AROUND 25 MPH BECOMING NORTHWEST AROUND 13
MPH IN THE LATE EVENING AND OVERNIGHT.
VENTILATION INDEX...FAIR (350) DECREASING TO POOR (30) OVERNIGHT.
WEDNESDAY
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT).
CWR.................1 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....59-62.
MIN HUMIDITY........17-22 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 8 MPH.
RIDGETOP WIND.......WEST WINDS 5 TO 10 MPH.
MIXING HEIGHT.......6000 FT AGL IN THE LATE MORNING AND AFTERNOON.
TRANSPORT WINDS.....WEST 10 TO 13 MPH.
VENTILATION INDEX...POOR (30) INCREASING TO FAIR (400) IN THE
AFTERNOON.
FORECASTER...LAWHORN
REQUESTED BY...TREVOR LEWIS
TYPE OF REQUEST...PRESCRIBED
.TAG 2608291.5/PDT
.DELDT 04/06/26
.FORMATTERVERSION 2.0.0
.EMAIL BRETT.JOHNSON@USDA.GOV,TREVOR.J.LEWIS@USDA.GOV,ORBMC@FIRENET.GOV
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