651
FNUS76 KPDT 200000
FWSPDT
SPOT FORECAST FOR BIRCH CREEK FIRE...USFS
NATIONAL WEATHER SERVICE PENDLETON OR
500 PM PDT SAT SEP 19 2020
FORECAST IS BASED ON FORECAST START TIME OF 1700 PDT ON SEPTEMBER 19.
***THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS***
***WINDS ARE 20 FOOT 10-MINUTE AVERAGES***
***CWR-CHANCE OF WETTING RAIN 0.10 OR GREATER***
IF YOU HAVE QUESTIONS OR CONCERNS WITH THIS FORECAST, PLEASE
CONTACT OUR OFFICE AT (541) 276-8134.
DISCUSSION
UPPER RIDGE BUILDING INTO THE REGION TONIGHT AND SUNDAY
WITH DRY WESTERLY FLOW.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. A
SLIGHT CHANCE OF RAIN SHOWERS IN THE EVENING.
CWR.................5 PERCENT.
LAL.................1.
MIN TEMPERATURE.....38-42.
MAX HUMIDITY........82-87 PERCENT.
WIND (20 FT)........WEST WINDS 5-10 MPH.
RIDGETOP WIND.......WEST 10-15 MPH.
MIXING HEIGHT.......2500 FT AGL IN THE EVENING THEN NEAR SURFACE.
TRANSPORT WINDS.....WEST 5-10 MPH.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
DOMINATED FIRE GROWTH.
SUNDAY
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
CWR.................0 PERCENT.
LAL.................1.
MAX TEMPERATURE.....66-70.
MIN HUMIDITY........32-37 PERCENT.
WIND (20 FT)........NORTHWEST 5-10 MPH.
RIDGETOP WIND.......WEST 10-15 MPH.
MIXING HEIGHT.......NEAR SURFACE THEN 5400 FT AGL EARLY IN THE
MORNING.
TRANSPORT WINDS.....WEST 10-15 MPH.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
DOMINATED FIRE GROWTH.
SUNDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
LAL.................1.
MIN TEMPERATURE.....36-40.
MAX HUMIDITY........62-67 PERCENT.
WIND (20 FT)........NORTHWEST 3-6 MPH.
RIDGETOP WIND.......SOUTHWEST 5-10 MPH.
MIXING HEIGHT.......5000 FT AGL EARLY IN THE EVENING THEN NEAR
SURFACE.
TRANSPORT WINDS.....WEST 5-10 MPH.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
FIRE GROWTH.
MONDAY
SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
LAL.................1.
MAX TEMPERATURE.....68-72.
MIN HUMIDITY........36-41 PERCENT.
WIND (20 FT)........NORTHWEST 5-10 MPH.
RIDGETOP WIND.......SOUTHWEST 10-15 MPH.
MIXING HEIGHT.......NEAR SURFACE THEN 3900 FT AGL LATE IN THE
MORNING.
TRANSPORT WINDS.....WEST 10-15 MPH.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
FIRE GROWTH.
FORECASTER...RC
REQUESTED BY...KIP TURNER
TYPE OF REQUEST...WILDFIRE
.TAG 2012721.2/PDT
.DELDT 09/19/20
.FORMATTERVERSION 1.0.26
.EMAIL SARAH.ANDERSEN@OREGON.GOV
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