196
FNUS76 KPDT 012124
FWSPDT

Spot Forecast for Slough 1 West...USFWS
National Weather Service Pendleton OR
124 PM PST Sun Mar 1 2026

Forecast is based on ignition time of 0700 PST on March 02.
***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 prevail through Tuesday at
the burn site, but chances (40-65%) of light rain will increase
Tuesday night. Winds will shift from west to south Monday afternoon,
then increase and shift to the southwest Tuesday afternoon.
Ventilation will be generally poor as mixing heights remain under
3kft.

.MONDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....59-62.
Min humidity........40-45 percent.
Wind (20 ft)........West winds 4 to 7 mph shifting to the south 5
                    to 8 mph after 12PM.
Mixing height.......2800 ft AGL.
Transport winds.....Light winds becoming southwest 5 to 7 mph in
                    the late morning and afternoon.
Ventilation Index...Poor (30-100) increasing to poor (70-100) in
                    the afternoon.

TIME (PST)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............36  39  44  48  51  54  56  58  58  59  57  54
RH..............84  78  71  61  55  51  49  45  44  43  49  58
20 FT wind dir..W   W   W   SW  SW  SW  S   S   S   S   S   S
20 FT wind spd..5   5   5   6   6   6   7   7   7   7   7   7
20 FT wind gust.6   6   6

.MONDAY NIGHT...

Sky/weather.........Mostly clear (10-20 percent) then becoming
                    mostly cloudy (50-60 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....41-44.
Max humidity........83-88 percent.
Wind (20 ft)........South winds 5 to 10 mph shifting to the southeast
after 8PM.
Mixing height.......500 ft AGL.
Transport winds.....South 7 to 12 mph.
Ventilation Index...Poor (40-70) decreasing to poor (40-50)
                    overnight.

.TUESDAY...

Sky/weather.........Partly sunny (60-70 percent) then becoming
                    cloudy (85-95 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....62-65.
Min humidity........49-54 percent.
Wind (20 ft)........Southeast winds 5 to 10 mph shifting to the
                    south after 7AM, then shifting to the southwest
7 to 13 mph with gusts up to 20 mphafter 12PM.
Mixing height.......2800 ft AGL.
Transport winds.....Southwest 12 to 16 mph shifting to the west
                    around 14 mph late in the afternoon.
Ventilation Index...Poor to fair (50-270) increasing to poor to
                    fair (170-270) in the afternoon.

$$
Forecaster...Lawhorn
Requested by...Thomas Boggs
Type of request...PRESCRIBED
.TAG 2604101.2/PDT
.DELDT 03/01/26
.FormatterVersion 2.0.0
.EMAIL thomas_boggs@fws.gov