FNUS76 KPDT 231309
FWSPDT
Spot Forecast for Hwy 20 Unit 87...USFS
National Weather Service Pendleton OR
609 AM PDT Tue Apr 23 2024
Forecast is based on ignition time of 0600 PDT on April 24.
***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...Clouds will slowly increase through the period due
to two incoming systems, one each day. Wednesday's system will
bring with it breezy conditions through the afternoon, peaking
between 3 PM and 6 PM with gusts of up to 20 mph possible.
Excellent overnight recoveries are anticipated as the next system
approaches, which will bring increasing rain chances to the fire
area through the day. The majority of rainfall should occur
through the late afternoon and evening, with possible
accumulations up to 0.25 of an inch by Thursday night.
.WEDNESDAY...
Sky/weather.........Partly cloudy (45-55 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....63-66.
Min humidity........26-31 percent.
Wind (20 ft)........Northwest winds 7 to 13 mph with gusts
of up to 20 mph mid-to late afternoon.
Ridgetop wind.......Northwest winds 10 to 15 mph with gusts up
to 22 mph mid-to late afternoon.
Mixing height.......4700 ft AGL early in the morning.
Transport winds.....West 10 to 14 mph increasing to 22 to 25
mph late in the afternoon.
Haines Index........2 to 4 or very low to low potential for
large plume dominated fire growth.
TIME (PDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
Temp............37 40 52 59 61 61
RH..............83 71 47 34 31 33
20 ft wind......W 6 W 7 W 7 W 8 W 12 W 12
20 ft wind gust. 8 8 10 14 14
.WEDNESDAY NIGHT...
Sky/weather.........Partly cloudy (45-65 percent). Slight chance of
rain showers early in the morning.
CWR.................2 percent.
LAL.................1.
Min temperature.....34-37.
Max humidity........88-93 percent.
Wind (20 ft)........Northwest winds 7 to 13 mph shifting to the
west-southwest 3 to 6 mph early in the morning.
Ridgetop wind.......Northwest winds 10 to 15 mph shifting to the
west-southwest 4 to 8 mph early in the morning.
Mixing height.......500 ft AGL.
Transport winds.....West 15 to 22 mph decreasing to around 9 mph
early in the morning.
Haines Index........2 or very low potential for large plume
dominated fire growth.
.THURSDAY...
Sky/weather.........Mostly cloudy (65-75 percent). Slight chance of
rain showers in the morning, then rain showers
likely late in the morning through the remainder
of the day.
CWR.................2 percent increasing to 70 percent.
LAL.................1.
Max temperature.....52-55.
Min humidity........56-61 percent.
Wind (20 ft)........West winds 5 to 10 mph.
Ridgetop wind.......West winds 6 to 12 mph.
Mixing height.......3600 ft AGL early in the morning.
Transport winds.....Southwest 7 to 15 mph shifting to the west
around 20 mph late in the afternoon.
Haines Index........2 or very low potential for large plume
dominated fire growth.
$$
Forecaster...Callihan
Requested by...Jeremy Gottfried
Type of request...PRESCRIBED
.TAG 2411877.0/PDT
.DELDT 04/23/24
.FormatterVersion 2.0.0
.EMAIL jeremy.gottfried@usda.gov
