098
FNUS76 KPDT 261716
FWSPDT
SPOT FORECAST FOR SAFR 271 RX...USFS
NATIONAL WEATHER SERVICE PENDLETON OR
1016 AM PDT SUN APR 26 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 PDT ON APRIL 27.
***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
A COUPLE WEAK WEATHER DISTURBANCES WILL MOVE OVER
THE PACIFIC NORTHWEST THROUGH TUESDAY RESULTING IN LOW (5-15 PERCENT)
CHANCES OF RAIN SHOWERS AND A VERY LOW (5 PERCENT) CHANCE OF LIGHTNING
MONDAY AFTERNOON. WINDS WILL BE MOSTLY DIURNALLY AND TERRAIN-DRIVEN,
STRONGEST DURING THE AFTERNOON AND EVENING HOURS. EXCELLENT
(80-90 PERCENT) OVERNIGHT RELATIVE HUMIDITY RECOVERY IS FORECAST,
WITH MILD (30-40 PERCENT) AFTERNOON MINIMUM RELATIVE HUMIDITY.
A WARMING TREND IS LIKELY (70 PERCENT CONFIDENCE) BY MID-WEEK.
MONDAY
SKY/WEATHER.........MOSTLY SUNNY (5-20 PERCENT) BECOMING
PARTLY CLOUDY (25-50 PERCENT) IN THE AFTERNOON.
SLIGHT CHANCE (15 PERCENT) OF RAIN SHOWERS
AND VERY LOW (5 PERCENT) CHANCE OF LIGHTNING.
CWR.................1 PERCENT.
CHANCE OF LIGHTNING.5 PERCENT.
MAX TEMPERATURE.....57-60.
MIN HUMIDITY........35-40 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE WINDS EARLY MORNING, BECOMING
NORTHWEST 5-9 MPH LATE MORNING. GUSTS OF 12-17 MPH
IN THE AFTERNOON.
RIDGETOP WIND.......LIGHT AND VARIABLE WINDS EARLY MORNING, BECOMING
NORTHWEST 6-10 MPH LATE MORNING. GUSTS OF 14-19 MPH
IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 7000-7500 FT AGL BY LATE MORNING.
TRANSPORT WINDS.....WEST 10-15 MPH.
VENTILATION INDEX...MODERATE (230) INCREASING TO VERY HIGH (990) IN
THE AFTERNOON.
TIME (PDT) 8 AM 10 AM NOON 2 PM 4 PM 6 PM
CHC OF LTNG (%).0 0 5 5 5 5
TEMP............37 49 54 56 58 55
RH..............73 50 40 39 38 43
20 FT WIND......VRB 3 NW 5 NW 8 NW 8 NW 8 WNW 8
20 FT WIND GUST. 12 15 15 15
MONDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (5-20 PERCENT). VERY LOW (5 PERCENT)
CHANCE OF RAIN SHOWERS IN THE EVENING.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.5 PERCENT IN THE EVENING, 0 PERCENT OVERNIGHT.
MIN TEMPERATURE.....31-34.
MAX HUMIDITY........85-90 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5-9 MPH WITH GUSTS OF 12-17 MPH
IN THE EVENING, BECOMING LIGHT AND VARIABLE OVERNIGHT.
RIDGETOP WIND.......NORTHWEST WINDS 6-10 MPH WITH GUSTS OF 14-19 MPH
IN THE EVENING, BECOMING LIGHT AND VARIABLE OVERNIGHT.
MIXING HEIGHT.......DECREASING TO 500-800 FT AGL OVERNIGHT.
TRANSPORT WINDS.....WEST 10-15 MPH IN THE EVENING, DECREASING TO 5-10 MPH
OVERNIGHT.
VENTILATION INDEX...HIGH (510) DECREASING TO LOW (80) OVERNIGHT.
TUESDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). VERY LOW (5 PERCENT)
CHANCE OF RAIN SHOWERS IN THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....60-63.
MIN HUMIDITY........30-35 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE WINDS EARLY MORNING, BECOMING
NORTWEST 5-8 MPH BY LATE MORNING. GUSTS OF 12-17
MPH IN THE AFTERNOON.
RIDGETOP WIND.......LIGHT AND VARIABLE WINDS EARLY MORNING, BECOMING
NORTWEST 6-10 MPH BY LATE MORNING. GUSTS OF 14-19
MPH IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 6500-7000 FT AGL BY LATE MORNING.
TRANSPORT WINDS.....SOUTHWEST 5-8 MPH IN THE MORNING, BECOMING WEST
10-15 MPH IN THE AFTERNOON.
VENTILATION INDEX...LOW (100) INCREASING TO HIGH (570) IN THE
AFTERNOON.
FORECASTER...PLUNKETT
REQUESTED BY...JEREMY GOTTFRIED
TYPE OF REQUEST...PRESCRIBED
.TAG 2611778.0/PDT
.DELDT 04/26/26
.FORMATTERVERSION 2.0.0
.EMAIL JEREMY.GOTTFRIED@USDA.GOV
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