037
FNUS76 KPDT 100148
FWSPDT
SPOT FORECAST FOR STONE...HIGH DESSERT TEAM 3
NATIONAL WEATHER SERVICE PENDLETON OR
648 PM PDT TUE SEP 9 2025
FORECAST IS BASED ON FORECAST START TIME OF 2000 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
A WET AND COOL PERIOD IS IN STORE, WITH PERIODS OF SHOWERS AND LOW
(20-30) PERCENT CHANCES OF THUNDERSTORMS THROUGH THURSDAY. CWR CHANCES INCREASE
AFTER TONIGHT.
WINDS WILL GENERALLY BE 10 MPH OR LESS, OUTSIDE OF ANY THUNDERSTORMS.
WITH THE RAIN AND MOISTURE AROUND, RH VALUES WILL BE INCREASING. MIN RH
VALUES ON WEDNESDAY WILL BE AROUND 50 TO 55 PERCENT AND 60 TO 65 PERCENT
ON THURSDAY WITH EXCELLENT OVERNIGHT RECOVERIES.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). CHANCE OF RAIN
SHOWERS (40%) EARLY IN THE EVENING. SLIGHT CHANCE
OF THUNDERSTORMS (20%) EARLY IN THE EVENING. SLIGHT
CHANCE (20%) OF RAIN SHOWERS LATE.
CWR.................3 PERCENT.
CHANCE OF LIGHTNING.18 PERCENT.
MIN TEMPERATURE.....50-53.
MAX HUMIDITY........89-94 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS EARLY IN THE EVENING.
RIDGETOP WIND.......NORTH WINDS AROUND 10 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTHWEST 6 TO 8 MPH SHIFTING TO THE WEST
AROUND 5 MPH EARLY IN THE MORNING.
VENTILATION INDEX...POOR (100) DECREASING TO POOR (30) OVERNIGHT.
TIME (PDT) 8 PM 10 PM MIDNGT 2 AM 4 AM 6 AM
CHC OF LTNG (%).20 20 20 10 10 0
TEMP............63 60 57 53 52 50
RH..............64 71 78 84 87 94
20 FT WIND......W 4 W 4 W 4 W 4 W 4 SW 4
20 FT WIND GUST.6 6 5 5 5
WEDNESDAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). SLIGHT CHANCE (20%) OF
RAIN SHOWERS EARLY IN THE MORNING. RAIN SHOWERS
LIKELY (70%) AND CHANCE OF THUNDERSTORMS (30%) LATE IN THE
AFTERNOON.
CWR.................4 PERCENT INCREASING TO 62 PERCENT LATE IN THE
AFTERNOON.
CHANCE OF LIGHTNING.37 PERCENT.
MAX TEMPERATURE.....71-74.
MIN HUMIDITY........49-54 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTH 5 TO 7 MPH LATE IN
THE AFTERNOON, THEN SHIFTING TO THE NORTHWEST
AROUND 5 MPH LATE IN THE AFTERNOON. GUSTY AND
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS LATE
IN THE AFTERNOON.
RIDGETOP WIND.......NORTH WINDS AROUND 10 MPH, DECREASING TO 5 TO 10 MPH IN THE
LATE AFTERNOON.
MIXING HEIGHT.......4900 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE NORTH 7
TO 9 MPH LATE IN THE MORNING.
VENTILATION INDEX...POOR (30) INCREASING TO FAIR (310) IN THE
AFTERNOON.
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). RAIN SHOWERS (70-80%) AND
CHANCE OF THUNDERSTORMS (30%) IN THE EVENING, THEN
RAIN SHOWERS LIKELY OVERNIGHT (70%)
CWR.................62 PERCENT INCREASING TO 73 PERCENT LATE IN THE
EVENING.
CHANCE OF LIGHTNING.37 PERCENT.
MIN TEMPERATURE.....54-57.
MAX HUMIDITY........95-100 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 7 MPH EARLY IN THE EVENING
BECOMING LIGHT. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE EVENING.
RIDGETOP WIND.......NORTHWEST WIND 5 TO 10 MPH, BECOMING SOUTHWEST BY MORNING
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 7 MPH SHIFTING TO THE
SOUTHWEST AROUND 6 MPH EARLY IN THE EVENING.
VENTILATION INDEX...POOR (110) DECREASING TO POOR (40) OVERNIGHT.
THURSDAY
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE (20%) OF
THUNDERSTORMS IN THE MORNING. RAIN SHOWERS (80%)
THROUGH THE DAY. CHANCE OF THUNDERSTORMS (30%) IN THE
AFTERNOON.
CWR.................77 PERCENT DECREASING TO 9 PERCENT LATE IN THE
AFTERNOON.
CHANCE OF LIGHTNING.32 PERCENT.
MAX TEMPERATURE.....66-69.
MIN HUMIDITY........59-64 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTHWEST 5 TO 7 MPH LATE
IN THE AFTERNOON. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS LATE IN THE
MORNING. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS LATE IN THE AFTERNOON.
RIDGETOP WIND.......SOUTHWEST WINDS 5 TO 10 MPH, BECOMING NORTHWEST IN
THE AFTERNOON.
MIXING HEIGHT.......3100 FT AGL.
TRANSPORT WINDS.....WEST 6 TO 7 MPH SHIFTING TO THE NORTHWEST
AROUND 7 MPH LATE IN THE AFTERNOON.
VENTILATION INDEX...POOR (40) INCREASING TO POOR (140) IN THE
AFTERNOON.
FORECASTER...NIERENBERG
REQUESTED BY...CHISTOPH
TYPE OF REQUEST...WILDFIRE
.TAG 2521348.5/PDT
.DELDT 09/09/25
.FORMATTERVERSION 2.0.0
.EMAIL MICHALE.J.CEARNS@ODF.OREGON.GOV,ORJDCC@FIRENET.GOV,STACY.LAURITSEN@OREGON.GOV
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