536
FNUS76 KPDT 021420
FWSPDT

Spot Forecast for Slough 1 West...USFWS
National Weather Service Pendleton OR
620 AM PST Mon Mar 2 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...Conditions will remain dry at the burn site through
Tuesday afternoon, with increasing chances for rain Tuesday night.
Winds will remain light today, and will increase out of the southwest
Tuesday as a frontal system approaches the burn site. Ventilation
will generally remain poor with fairly low mixing heights.

.REST OF TODAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....60-63.
Min humidity........40-45 percent.
Wind (20 ft)........South winds 5 to 8 mph.
Mixing height.......2800 ft AGL.
Transport winds.....Light winds becoming southwest 5 to 6 mph in
                    the late morning and afternoon.
Ventilation Index...Poor (30-110) increasing to poor (60-110) 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............37  40  45  49  52  54  57  58  59  60  58  55
RH..............84  79  71  61  56  53  48  46  46  45  50  58
20 FT wind dir..S   S   S   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

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent) then becoming
                    mostly cloudy (50-60 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....40-43.
Max humidity........80-85 percent.
Wind (20 ft)........South to southeast winds 5 to 8 mph with gusts
                    to 13 mph.
Mixing height.......500 ft AGL.
Transport winds.....South 6 to 10 mph.
Ventilation Index...Poor (50-60).

.TUESDAY...

Sky/weather.........Mostly cloudy (65-75 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....63-66.
Min humidity........48-53 percent.
Wind (20 ft)........South winds 5 to 8 mph shifting to the west to
                    southwest 6 to 12 mph in the afternoon with gusts
                    to 20 mph.
Mixing height.......2700 ft AGL.
Transport winds.....Southwest 9 to 15 mph shifting to the west
                    around 15 mph late in the afternoon.
Ventilation Index...Poor to fair (50-240) increasing to fair
                    (200-240) in the afternoon.

$$
Forecaster...NWS Seattle
Requested by...Thomas Boggs
Type of request...PRESCRIBED
.TAG 2604101.3/PDT
.DELDT 03/02/26
.FormatterVersion 2.0.0
.EMAIL thomas_boggs@fws.gov