531
FNUS76 KPDT 010743
FWSPDT
SPOT FORECAST FOR DMR 4/25...USFS
NATIONAL WEATHER SERVICE PENDLETON OR
1243 AM PDT FRI MAY 1 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 PDT ON MAY 01.
***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 TRANSPORT WIND
MULTIPLIED BY THE MIXING HEIGHT IN 100'S OF FT.
CATEGORIES ARE A GENERALIZED INDICATOR ONLY:
LOW (< 200), MODERATE (200-500), HIGH (500-700),
AND VERY HIGH (> 700). ***
IF YOU HAVE QUESTIONS OR CONCERNS WITH THIS FORECAST, PLEASE
CONTACT OUR OFFICE AT (541) 276-8134.
DISCUSSION
GENERALLY DRY CONDITIONS ARE EXPECTED. HOWEVER,
THERE IS A SLIGHT CHANCE OF RAIN SHOWERS THIS AFTERNOON AND A VERY LOW
(<15 PERCENT) CHANCE OF THUNDERSTORMS TODAY AND TONIGHT. ON SATURDAY THERE
IS A 20 PERCENT CHANCE OF SHOWERS AND AFTERNOON THUNDERSTORMS.
WINDS WILL GENERALLY BE 10 MPH OR LESS, THOUGH THERE COULD BE SOME GUSTS IN THE
10 TO 15 MPH RANGE IN THE AFTERNOON.
MIN RH VALUES WILL BE 15 TO 20 PERCENT TODAY AND 25 TO 30 PERCENT ON SATURDAY
WITH EXCELLENT OVERNIGHT RECOVERIES.
TODAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). SLIGHT CHANCE (20 PERCENT)
OF RAIN SHOWERS LATE IN THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.14 PERCENT.
MAX TEMPERATURE.....73-76.
MIN HUMIDITY........15-20 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH 5 TO 8 MPH LATE IN
THE MORNING, THEN SHIFTING TO THE WEST 5 TO 6
MPH LATE IN THE AFTERNOON.
RIDGETOP WIND.......SOUTHEAST WIND 5 TO 10 MPH, BECOMING SOUTH
IN THE AFTERNOON.
MIXING HEIGHT.......10300 FT AGL.
TRANSPORT WINDS.....SOUTH 8 TO 14 MPH.
VENTILATION INDEX...LOW (150) INCREASING TO VERY HIGH (1040) IN THE
AFTERNOON.
TIME (PDT) 8 AM 10 AM NOON 2 PM 4 PM 6 PM
CHC OF LTNG (%).0 0 0 10 10 10
TEMP............44 60 68 72 73 69
RH..............50 29 23 20 20 27
20 FT WIND......S 4 S 4 S 7 S 7 S 7 W 6
20 FT WIND GUST.10 10 12 12 12 11
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE (20%) OF
RAIN SHOWERS IN THE EVENING.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.14 PERCENT.
MIN TEMPERATURE.....42-45.
MAX HUMIDITY........84-89 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 7 MPH IN THE EVENING BECOMING
LIGHT.
RIDGETOP WIND.......SOUTH WINDS 5 TO 10 MPH, BECOMING NORTHWEST
THEN NORTH OVERNIGHT.
MIXING HEIGHT.......600 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 8 MPH EARLY IN THE EVENING
SHIFTING TO THE NORTHWEST AROUND 7 MPH, THEN
SHIFTING TO THE NORTHEAST AROUND 5 MPH
OVERNIGHT BECOMING LIGHT.
VENTILATION INDEX...LOW (190) DECREASING TO LOW (30) OVERNIGHT.
SATURDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF RAIN
SHOWERS (20%) LATE IN THE MORNING. SLIGHT CHANCE OF
THUNDERSTORMS LATE IN THE AFTERNOON.
CWR.................8 PERCENT INCREASING TO 14 PERCENT LATE IN THE
AFTERNOON.
CHANCE OF LIGHTNING.19 PERCENT.
MAX TEMPERATURE.....72-75.
MIN HUMIDITY........27-32 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING EAST 5 TO 7 MPH LATE IN
THE MORNING, THEN SHIFTING TO THE SOUTHEAST
LATE IN THE AFTERNOON. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS LATE IN THE
AFTERNOON.
RIDGETOP WIND.......NORTH WINDS 5 TO 10 MPH BECOMING EAST TO SOUTHEAST
IN THE AFTERNOON THEN SHIFTING BACK TO NORTH IN THE EVENING.
MIXING HEIGHT.......9700 FT AGL.
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTHEAST 6 TO 14 MPH
EARLY IN THE MORNING, THEN SHIFTING TO THE
NORTHEAST AROUND 12 MPH LATE IN THE AFTERNOON.
VENTILATION INDEX...LOW (30) INCREASING TO VERY HIGH (880) IN THE
AFTERNOON.
FORECASTER...NIERENBERG
REQUESTED BY...PATRICK ODELL
TYPE OF REQUEST...PRESCRIBED
.TAG 2612139.1/PDT
.DELDT 05/01/26
.FORMATTERVERSION 2.0.0
.EMAIL KYLE.CASHMAN@USDA.GOV,CONOR_SHANAHAN@FWS.GOV,PATRICK.ODELL@USDA.GOV,ERIN.WALDMAN@USDA.GOV
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