286
FNUS76 KPDT 301503
FWSPDT
SPOT FORECAST FOR TIDDLY WINKS 2B & 3...USDA US FOREST SERVICE
NATIONAL WEATHER SERVICE PENDLETON OR
803 AM PDT THU APR 30 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 PDT ON APRIL 30.
***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
WARM, DRY CONDITIONS TODAY WITH DIURNALLY AND
TERRAIN-DRIVEN WINDS. WARMER FRIDAY, WITH A SLIGHT CHANCE
(15 PERCENT) OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON AND
EVENING HOURS. WINDS WILL BE MORE SOUTH TO SOUTHWEST ON FRIDAY,
WITH A SWITCH TO NORTH TO NORTHWEST WINDS LATE AFTERNOON AND
EVENING. ANY SHOWERS OR THUNDERSTORMS THAT DEVELOP WILL BE CAPABLE
OF PRODUCING ERRATIC, GUSTY OUTFLOW WINDS OF 30-40 MPH.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (25-50 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.1 PERCENT.
MAX TEMPERATURE.....68-71.
MIN HUMIDITY........20-25 PERCENT.
WIND (20 FT)........BECOMING NORTHEAST WINDS 4-9 MPH THROUGH EARLY
MORNING, STRONGEST IN THE LATE AFTERNOON AND
EARLY EVENING.
RIDGETOP WIND.......BECOMING NORTHEAST WINDS 5-10 MPH THROUGH EARLY
MORNING, STRONGEST IN THE LATE AFTERNOON AND
EARLY EVENING.
MIXING HEIGHT.......INCREASING TO 7500-8000 FT AGL BY AFTERNOON.
TRANSPORT WINDS.....EAST 4-7 MPH IN THE MORNING, BECOMING NORTHEAST
5-9 MPH IN THE AFTERNOON.
VENTILATION INDEX...LOW (80) INCREASING TO MODERATE (410) IN THE
AFTERNOON.
TIME (PDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............42 47 53 58 61 64 66 68 68 68 66 63
RH..............66 58 49 42 36 31 29 25 25 25 28 31
20 FT WIND DIR..NE NE NE NE NE NE NE NE NE NE NE NE
20 FT WIND SPD..4 4 4 7 7 7 7 7 7 6 6 6
20 FT WIND GUST.7 7 7 10 10 10 12 12 12 11 11 11
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (10-30 PERCENT).
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.1 PERCENT.
MIN TEMPERATURE.....40-43.
MAX HUMIDITY........57-62 PERCENT.
WIND (20 FT)........NORTH WINDS 5-9 MPH IN THE EVENING BECOMING
VARIABLE OR DRAINAGE 1-4 MPH OVERNIGHT.
RIDGETOP WIND.......NORTH WINDS 6-10 MPH IN THE EVENING BECOMING
VARIABLE OR DRAINAGE 1-4 MPH OVERNIGHT.
MIXING HEIGHT.......DECREASING TO 600-900 FT AGL OVERNIGHT.
TRANSPORT WINDS.....NORTH 7-12 MPH THEN SHIFTING TO THE
SOUTHWEST 4-8 MPH OVERNIGHT.
VENTILATION INDEX...DECREASING TO LOW (30) OVERNIGHT.
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (65-75 PERCENT) IN THE AFTERNOON.
SLIGHT CHANCE (15 PERCENT) OF RAIN SHOWERS AND
THUNDERSTORMS LATE IN THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.15 PERCENT.
MAX TEMPERATURE.....75-78.
MIN HUMIDITY........15-20 PERCENT.
WIND (20 FT)........VARIABLE OR DRAINAGE WINDS 1-5 MPH EARLY MORNING, BECOMING
SOUTH 5-8 MPH BY MID-MORNING THEN BECOMING NORTH TO
NORTHWEST 6-10 MPH WITH GUSTS UP TO 15 MPH IN THE LATE
AFTERNOON.
RIDGETOP WIND.......VARIABLE OR DRAINAGE WINDS 1-5 MPH EARLY MORNING, BECOMING
SOUTH 5-8 MPH BY MID-MORNING THEN BECOMING NORTH TO
NORTHWEST 8-12 MPH WITH GUSTS UP TO 20 MPH IN THE LATE
AFTERNOON.
MIXING HEIGHT.......INCREASING TO 1000-10500 FT AGL BY AFTERNOON.
TRANSPORT WINDS.....SOUTH 8-12 MPH, BECOMING NORTH 8-12 LATE AFTERNOON.
VENTILATION INDEX...LOW (80) INCREASING TO VERY HIGH (950) IN THE
AFTERNOON.
FORECASTER...PLUNKETT
REQUESTED BY...LEONARD
TYPE OF REQUEST...PRESCRIBED
.TAG 2612158.1/PDT
.DELDT 04/30/26
.FORMATTERVERSION 2.0.0
.EMAIL JEFFERY.CRAWFORD@USDA.GOV,DANIEL.LEONARD@USDA.GOV
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