498
FNUS76 KPDT 081119
FWSPDT
SPOT FORECAST FOR FERRE RANCH BURN...OREGON DEPARTMENT OF FORESTRY
NATIONAL WEATHER SERVICE PENDLETON OR
419 AM PDT WED OCT 8 2025
FORECAST IS BASED ON IGNITION TIME OF 0500 PDT 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
DRY CONDITIONS WILL PREVAIL THROUGH THE FORECAST
PERIOD WITH MIN RHS TODAY IN THE LOW TO MID 20% AND GENERALLY
SOUTH WINDS 5 TO 7 MPH. WINDS WILL SETTLE TO TERRAIN DRIVEN
OVERNIGHT WITH OVERNIGHT RECOVERIES IN THE LOW TO MID 70%.
THURSDAY WINDS WILL START DOWNSLOPE/DOWNVALLEY BEFORE INCREASING
TO 5 TO 7 MPH FROM THE SOUTH AFTER THE INVERSION BREAKS AFTER 2PM.
MIN RHS WILL BE IN THE LOW TO MID 20%.
TODAY
SKY/WEATHER.........SUNNY (0-10 PERCENT). PATCHY FROST EARLY IN THE
MORNING.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.1 PERCENT.
MAX TEMPERATURE.....72-75.
MIN HUMIDITY........22-27 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 5 TO 7 MPH SHIFTING TO THE
SOUTH 5 TO 8 MPH AFTER 8AM THE SOUTHWEST
AFTER 11AM AND THE SOUTH AFTER 2PM.
RIDGETOP WIND.......SOUTHEAST WINDS 6 TO 8 MPH SHIFTING TO THE
SOUTH 6 TO 9 MPH AFTER 8AM THE SOUTHWEST
AFTER 11AM AND THE SOUTH AFTER 2PM.
MIXING HEIGHT.......7700 FT AGL.
TRANSPORT WINDS.....SOUTH 6 TO 13 MPH INCREASING TO 12 TO 21 MPH
LATE IN THE AFTERNOON.
VENTILATION INDEX...POOR (60) INCREASING TO EXCELLENT (850) IN THE
AFTERNOON.
TIME (PDT) 5AM 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............39 39 37 39 43 52 57 63 68 70 70 71
RH..............68 71 74 75 65 55 43 35 29 27 26 26
20 FT WIND DIR..SE SE SE S S S SW SW SW S S S
20 FT WIND SPD..5 5 5 6 6 6 7 7 7 8 8 8
20 FT WIND GUST.7 7 7 7 7 7 11 11 11 13 13 13
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.1 PERCENT.
MIN TEMPERATURE.....41-44.
MAX HUMIDITY........71-76 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 8 MPH SHIFTING TO THE EAST
AFTER 5PM, THEN BECOMING LIGHT OVERNIGHT.
RIDGETOP WIND.......SOUTH WINDS 6 TO 9 MPH SHIFTING TO THE EAST
AFTER 5PM, THEN BECOMING DOWNSLOPE/DOWNVALLEY.
MIXING HEIGHT.......800 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 8 TO 12 MPH.
VENTILATION INDEX...POOR (140) DECREASING TO POOR (80) OVERNIGHT.
THURSDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....75-78.
MIN HUMIDITY........22-27 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH 5 TO 7 MPH AFTER 2PM.
RIDGETOP WIND.......DOWNSLOPE/DOWNVALLEY BECOMING SOUTH 6 TO 8 MPH
AFTER 2PM.
MIXING HEIGHT.......5600 FT AGL.
TRANSPORT WINDS.....SOUTH 6 TO 9 MPH.
VENTILATION INDEX...POOR (50) INCREASING TO FAIR (260) IN THE
AFTERNOON.
FORECASTER...BENNESE
REQUESTED BY...AMANDA RAU
TYPE OF REQUEST...PRESCRIBED
.TAG 2523140.0/PDT
.DELDT 10/08/25
.FORMATTERVERSION 2.0.0
.EMAIL MICAH.SCHMIDT@OREGONSTATE.EDU
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