954
FNUS76 KPDT 081718
FWSPDT
SPOT FORECAST FOR STONE...HIGH DESERT TYPE 3 TEAM
NATIONAL WEATHER SERVICE PENDLETON OR
1018 AM PDT MON SEP 8 2025
FORECAST IS BASED ON FORECAST START TIME OF 1311 PDT ON SEPTEMBER 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
COOLER TEMPERATURES ARE EXPECTED THE NEXT SEVERAL DAYS.
SHOWERS AND LOW CHANCES (20 TO 30 PERCENT) OF THUNDERSTORMS ARE EXPECTED
THROUGH TUESDAY. THE BEST CHANCE OF WETTING RAIN IS TUESDAY.
WITH THE COOLER TEMPERATURES AND INCREASING MOISTURE, RH VALUES WILL ALSO
INCREASE. MIN RH VALUES WILL BE 35 TO 40 PERCENT TODAY AND 50 TO 55 PERCENT
TUESDAY, WITH EXCELLENT OVERNIGHT RECOVERIES.
TODAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). SLIGHT CHANCE (20%) OF
SHOWERS EARLY IN THE AFTERNOON. A SLIGHT CHANCE (20%)
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. SHOWER
CHANCES WILL INCREASE FROM 30% IN THE MORNING TO 60%
IN THE AFTERNOON.
CWR.................13 PERCENT INCREASING TO 32 PERCENT LATE IN THE
AFTERNOON.
CHANCE OF LIGHTNING.28 PERCENT.
MAX TEMPERATURE.....79-82.
MIN HUMIDITY........34-39 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
AFTERNOON.
RIDGETOP WIND.......SOUTHWEST WINDS 5 TO 10 MPH, BECOMING NORTHEAST
IN THE AFTERNOON.
MIXING HEIGHT.......7500 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 6 MPH EARLY IN THE AFTERNOON
BECOMING LIGHT, THEN BECOMING NORTH AROUND 12
MPH LATE IN THE AFTERNOON.
VENTILATION INDEX...FAIR (230).
TIME (PDT) 1 PM 3 PM 5 PM 7 PM 9 PM 11 PM
CHC OF LTNG (%).10 30 20 20 10 10
TEMP............76 78 74 69 62 59
RH..............42 36 46 54 66 74
20 FT WIND......N 3 NW 5 N 6 N 6 W 5 SW 5
20 FT WIND GUST.6 8 8 8 6 6
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING
PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (55-65 PERCENT). RAIN SHOWERS
LIKELY (60%) AND SLIGHT CHANCE (20%) OF
THUNDERSTORMS EARLY IN THE EVENING, THEN CHANCE
(30%) OF RAIN SHOWERS.
CWR.................32 PERCENT DECREASING TO 3 PERCENT LATE IN THE
EVENING.
CHANCE OF LIGHTNING.23 PERCENT.
MIN TEMPERATURE.....50-53.
MAX HUMIDITY........89-94 PERCENT.
WIND (20 FT)........NORTH WINDS 5 TO 7 MPH EARLY IN THE EVENING
SHIFTING TO THE WEST, THEN SHIFTING TO THE
SOUTHWEST LATE IN THE EVENING BECOMING LIGHT.
GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS EARLY IN THE EVENING.
RIDGETOP WIND.......NORTHEAST WIND 10 TO 15 MPH, WITH GUSTS TO 20 MPH
IN THE EVENING, THEN SHIFTING TO THE WEST AROUND
10 MPH BY MORNING.
MIXING HEIGHT.......900 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 12 MPH SHIFTING TO THE WEST 6 TO
12 MPH EARLY IN THE EVENING, THEN BECOMING
LIGHT EARLY IN THE MORNING.
VENTILATION INDEX...POOR (140) DECREASING TO POOR (50) OVERNIGHT.
TUESDAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). RAIN SHOWERS
LIKELY (70%) THROUGH THE DAY. SLIGHT CHANCE (20%)
OF THUNDERSTORMS IN THE MORNING AND A CHANCE (30%)
OF THUNDERSTORMS IN THE AFTERNOON.
CWR.................3 PERCENT INCREASING TO 60 PERCENT LATE IN THE
MORNING, THEN DECREASING TO 20 PERCENT LATE IN
THE AFTERNOON.
CHANCE OF LIGHTNING.25 PERCENT.
MAX TEMPERATURE.....71-74.
MIN HUMIDITY........49-54 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTH AROUND 5 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.......WEST WINDS 5 10 10 MPH BECOMING NORTHWEST IN THE
AFTERNOON.
MIXING HEIGHT.......5800 FT AGL.
TRANSPORT WINDS.....LIGHT WINDS BECOMING WEST 5 TO 7 MPH LATE IN
THE MORNING, THEN SHIFTING TO THE NORTH AROUND
7 MPH LATE IN THE AFTERNOON.
VENTILATION INDEX...POOR (40) INCREASING TO FAIR (230) IN THE
AFTERNOON.
FORECASTER...NIERENBERG
REQUESTED BY...DEVON JOHNSON
TYPE OF REQUEST...WILDFIRE
.TAG 2521270.5/PDT
.DELDT 09/08/25
.FORMATTERVERSION 2.0.0
.EMAIL DEVIN.L.JOHNSON@USDA.GOV,ORJDCC@FIRENET.GOV
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