979
FNUS76 KPDT 202337
FWSPDT
SPOT FORECAST FOR SAFR 46 RX...USFS
NATIONAL WEATHER SERVICE PENDLETON OR
437 PM PDT TUE MAY 20 2025
FORECAST IS BASED ON IGNITION TIME OF 0900 PDT ON MAY 21.
***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
DRY CONDITIONS WILL CONTINUE THROUGH THE FIRST HALF
OF WEDNESDAY. A WEATHER SYSTEM COMING IN LATE WEDNESDAY WILL PRODUCE
LIGHT SHOWER CHANCES, BUT CHANCE OF WETTING RAIN WILL BE LESS THAN
10%. WINDS WILL BE FROM THE NORTH TO NORTHEAST TOMORROW AFTERNOON AND
EVENING, THEN BECOMING NORTHWEST FOR THURSDAY. AFTERNOON RHS WILL BE
IN THE MID TO UPPER 20S WEDNESDAY AND LOWER 40S THURSDAY. OVERNIGHT
RECOVERY WILL BE GOOD TO EXCELLENT.
WEDNESDAY
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (80-90 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS LATE IN THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.3 PERCENT.
MAX TEMPERATURE.....67-70.
MIN HUMIDITY........26-31 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTHEAST 5 TO 7 MPH AFTER
3PM.
MIXING HEIGHT.......5700 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 6 MPH SHIFTING TO THE NORTHWEST
AROUND 7 MPH LATE IN THE AFTERNOON.
VENTILATION INDEX...POOR (80) INCREASING TO FAIR (210) IN THE
AFTERNOON.
TIME (PDT) 9 AM 11 AM 1 PM 3 PM 5 PM 7 PM
CHC OF LTNG (%).0 0 0 0 0 0
TEMP............46 55 62 66 67 63
RH..............62 45 35 31 32 38
20 FT WIND......N 2 NE 3 NE 3 NE 5 N 6 N 6
20 FT WIND GUST. 6 6 10 10 10
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS IN THE EVENING, THEN CHANCE OF
RAIN SHOWERS LATE IN THE EVENING.
CWR.................8 PERCENT INCREASING TO 11 PERCENT EARLY IN THE
MORNING.
CHANCE OF LIGHTNING.4 PERCENT.
MIN TEMPERATURE.....39-42.
MAX HUMIDITY........81-86 PERCENT.
WIND (20 FT)........NORTH WINDS 4 TO 7 MPH BECOMING DOWNSLOPE WINDS
AFTER 11PM.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WINDS.....NORTHWEST 5 TO 8 MPH.
VENTILATION INDEX...POOR (170) DECREASING TO POOR (50) OVERNIGHT.
THURSDAY
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT). CHANCE OF RAIN
SHOWERS IN THE MORNING.
CWR.................11 PERCENT DECREASING TO 0 PERCENT LATE IN THE
MORNING.
CHANCE OF LIGHTNING.5 PERCENT.
MAX TEMPERATURE.....61-64.
MIN HUMIDITY........41-46 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTHWEST 4 TO 7 MPH AFTER
2PM.
MIXING HEIGHT.......5300 FT AGL.
TRANSPORT WINDS.....WEST 8 TO 12 MPH.
VENTILATION INDEX...POOR (140) INCREASING TO FAIR (350) IN THE
AFTERNOON.
FORECASTER...LAWHORN
REQUESTED BY...WILLIAM SWANSON (RXB2T)
TYPE OF REQUEST...PRESCRIBED
.TAG 2514379.0/PDT
.DELDT 05/20/25
.FORMATTERVERSION 2.0.0
.EMAIL WILLIAM.SWANSON@USDA.GOV
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