310
FNUS76 KPDT 090924
FWSPDT
SPOT FORECAST FOR MISSION CREEK...BIA
NATIONAL WEATHER SERVICE PENDLETON OR
224 AM PDT TUE SEP 9 2025
FORECAST IS BASED ON FORECAST START TIME OF 0700 PDT ON SEPTEMBER 09.
***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
A SLOWLY APPROACHING WEATHER SYSTEM WILL BRING
ANOTHER ROUND OF AFTERNOON AND EARLY EVENING SHOWERS AND
THUNDERSTORMS TODAY. STORMS COULD PRODUCE GUSTY WINDS, SMALL
HAIL, AND BRIEF DOWNPOURS. ALTHOUGH LOCALLY WETTING RAINS ARE
POSSIBLE, OVERALL CWRS REMAIN GENERALLY LOW. MOISTURE FROM THIS
SYSTEM WILL FOSTER BOTH GOOD RH RECOVERIES OVERNIGHT AND MINIMUM
RHS TODAY AROUND 45 PERCENT. LIGHT WINDS WILL CONTINUE THIS
MORNING AND AGAIN OVERNIGHT, NORTHERLY DURING THE AFTERNOON AND
EVENING.
TODAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS IN THE MORNING. CHANCE OF RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS LATE
IN THE AFTERNOON.
CWR.................1 PERCENT INCREASING TO 12 PERCENT LATE IN THE
AFTERNOON.
CHANCE OF LIGHTNING.22 PERCENT.
MAX TEMPERATURE.....70-73.
MIN HUMIDITY........43-48 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING WEST 5 TO 7 MPH EARLY IN
THE MORNING, THEN SHIFTING TO THE NORTHWEST 5
TO 8 MPH LATE IN THE MORNING. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS LATE IN THE
AFTERNOON.
RIDGETOP WIND.......NORTHWEST AROUND 5 MPH INCREASING TO 6 TO 8 MPH
LATE IN THE AFTERNOON.
MIXING HEIGHT.......3100 FT AGL EARLY IN THE MORNING.
TRANSPORT WINDS.....SOUTHWEST AROUND 6 MPH SHIFTING TO THE NORTH 8
TO 9 MPH LATE IN THE AFTERNOON.
VENTILATION INDEX...POOR (30) INCREASING TO FAIR (210) IN THE
AFTERNOON.
TIME (PDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM
CHC OF LTNG (%).10 10 10 10 10 10 10 20 20 20 20 20
TEMP............58 60 60 61 63 65 67 68 68 68 70 68
RH..............68 64 65 64 63 58 53 50 49 48 49 51
20 FT WIND DIR..S W W W NW NW NW NW NW NW NW NW
20 FT WIND SPD..4 5 5 5 7 7 7 7 7 7 5 5
20 FT WIND GUST.6 7 7 7 10 10 10 11 11 11 8 8
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
PARTLY CLOUDY (35-45 PERCENT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN
THE EVENING, THEN SLIGHT CHANCE OF SHOWERS LATE
IN THE EVENING. CHANCE OF SHOWERS EARLY IN THE
MORNING.
CWR.................12 PERCENT DECREASING TO 0 PERCENT LATE IN THE
EVENING.
CHANCE OF LIGHTNING.22 PERCENT.
MIN TEMPERATURE.....AROUND 60.
MAX HUMIDITY........69-74 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 7 MPH EARLY IN THE EVENING
BECOMING LIGHT. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE EVENING.
RIDGETOP WIND.......NORTHWEST AROUND 7 MPH IN THE EVENING EASING
TO AROUND 5 MPH.
MIXING HEIGHT.......1600 FT AGL EARLY IN THE EVENING.
TRANSPORT WINDS.....NORTH AROUND 8 MPH SHIFTING TO THE SOUTHWEST 5
TO 6 MPH EARLY IN THE EVENING.
VENTILATION INDEX...POOR (50) DECREASING TO POOR (30) OVERNIGHT.
FORECASTER...NWS SEATTLE
REQUESTED BY...IC
TYPE OF REQUEST...WILDFIRE
.TAG 2521613.0/PDT
.DELDT 09/09/25
.FORMATTERVERSION 2.0.0
.EMAIL ORBMC@FIRENET.GOV
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