450
FNUS76 KPDT 131446
FWSPDT

Spot Forecast for Umatilla Tumbleweed RX...USFWS
National Weather Service Pendleton OR
646 AM PST Fri Feb 13 2026

Forecast is based on ignition time of 1000 PST on February 13.
***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...
Expect a quiet start to the day with winds less than 10 mph and
mixing heights as high as 1500 ft AGL between 1300-1500 hours. A
weak weather system brings a 20% chance of light rain this
afternoon with little to no accumulated expected. Higher chances
for rain arrive late Saturday afternoon with accumulations between
0.05 and 0.10 inches.

.TODAY...

Sky/weather.........Cloudy (85-95 percent). 20% chance of rain
                    late in the afternoon.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....46-49.
Min humidity........70-75 percent.
Wind (20 ft)........Southwest winds 5 to 7 mph.
Ridgetop wind.......Southwest winds 5 to 7 mph.
Mixing height.......1200-1500 ft AGL in the afternoon.
Transport winds.....Southwest around 6 mph in the late morning and
                    early afternoon becoming light.
Ventilation Index...Poor (30-50).

TIME (PST)      10 AM  NOON   2 PM   4 PM   6 PM   8 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............39     44     46     46     45     42
RH..............95     85     75     77     84     87
20 ft wind......SW 5   SW 5   SW 5   S 5    S 5    S 5
20 ft wind gust.6      6      6      6      6

.TONIGHT...

Sky/weather.........Cloudy (85-95 percent). 25% chance of light
                    rain in the evening and overnight.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....37-40.
Max humidity........95-100 percent.
Wind (20 ft)........Southwest winds 5 to 7 mph.
Ridgetop wind.......Southwest winds 5 to 7 mph.
Mixing height.......Falling to the surface at 1700 hours.
Transport winds.....Light winds becoming southwest 6 to 8 mph
                    overnight.
Ventilation Index...Poor (30-50).

.SATURDAY...

Sky/weather.........Cloudy (85-95 percent). 25% chance of rain in the
                    late morning and early afternoon increasing to a
                    65% chance late in the afternoon
CWR.................0 percent in the morning and early afternoon,
                    increasing to 30 percent late in the afternoon.
Chance of lightning.0 percent.
Max temperature.....47-50.
Min humidity........75-80 percent.
Wind (20 ft)........Southwest winds 5 to 7 mph shifting to the
                    northeast late in the afternoon.
Ridgetop wind.......Southwest winds 5 to 7 mph shifting to the
                    northeast late in the afternoon.
Mixing height.......1300-1700 ft AGL in the afternoon.
Transport winds.....Southwest 5 to 8 mph shifting to the northeast
                    around 5 mph late in the afternoon.
Ventilation Index...Poor (30-60).

$$
Forecaster...NWS Spokane
Requested by...Thomas Boggs
Type of request...PRESCRIBED
.TAG 2602599.1/PDT
.DELDT 02/13/26
.FormatterVersion 2.0.0
.EMAIL thomas_boggs@fws.gov