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000
FNUS76 KPDT 240334
FWSPDT

Spot Forecast for Cold Canal 506...USFS Wallowa_Whitman NF
National Weather Service Pendleton OR
834 PM PDT Tue Apr 23 2024

Forecast is based on ignition time of 0800 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...Terrain driven winds and fair weather will give way to
light breezes and low chances for precipitation (less than 20%)
tomorrow, including possible thunderstorms (15%). This is
associated with a weak cold front crossing the area in the
afternoon. Occasional gusts reaching 15 to 20 mph are anticipated
in the late afternoon.

A second weather system will follow prompting a cooling trend and
unsettled conditions Thursday and Friday. Low chances for rain in
the early afternoon Thursday will be followed by high chances
after 5 PM Thursday persisting through Friday. High potential
(70-80%) for an quarter inch of rain or more over the 24-hr
Thursday night to Friday time period.

.WEDNESDAY...

Sky/weather.........Partly sunny (50-60 percent). Slight chance of
                    rain showers and thunderstorms mid to late
                    afternoon.
CWR.................5 percent.
LAL.................2.
Max temperature.....56-59.
Min humidity........35-43 percent.
Wind (20 ft)........Terrain driven winds 3 to 5 mph becoming north
                    winds 7 to 11 mph with gusts 15-20 mph late
                    afternoon.
Ridgetop wind.......North winds around 5 mph becoming 10 mph in the
                    afternoon.
Mixing height.......4300 ft AGL.
Transport winds.....Northwest 5 to 10 mph.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

TIME (PDT)      8 AM   10 AM  NOON   2 PM   4 PM   6 PM
Temp............45     51     56     56     55     50
RH..............62     53     48     42     45     55
20 ft wind......N 6    N 6    N 7    NW 8   NW 8   NW 11
20 ft wind gust.              10     12     12     18

.WEDNESDAY NIGHT...

Sky/weather.........Mostly cloudy (55-65 percent) then becoming
                    partly cloudy (35-45 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....33-36.
Max humidity........75-80 percent.
Wind (20 ft)........North winds 7 to 11 mph with gusts 15-20 mph
                    becoming northwest winds overnight 5 to 8 mph.
Ridgetop wind.......Northwest winds 5 to 10 mph.
Mixing height.......500 ft AGL.
Transport winds.....Northwest 7 to 10 mph.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

.THURSDAY...

Sky/weather.........Mostly sunny (45-55 percent) then becoming
                    mostly cloudy (80-90 percent) in the
                    afternoon. Slight chance of rain showers late
                    in the morning. Rain showers late in the
                    afternoon.
CWR.................5 percent increasing to 45 percent late in the
                    afternoon.
LAL.................1.
Max temperature.....45-48.
Min humidity........55-60 percent.
Wind (20 ft)........Northwest winds 5 to 8 mph.
Ridgetop wind.......North northwest winds 5 to 10 mph
Mixing height.......3400 ft AGL.
Transport winds.....Northwest 5 to 10 mph.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

$$
Forecaster...Townsend
Requested by...Gabriel Hale
Type of request...PRESCRIBED
.TAG 2411872.1/PDT
.DELDT 04/23/24
.FormatterVersion 2.0.0
.EMAIL jesse.bohnsack@usda.gov,gabriel.hale@usda.gov,mark.moeller@usda.gov,todd.pederson@usda.gov,jeffrey.brink@usda.gov