400
FNUS76 KPDT 231632
FWSPDT

Spot Forecast for Tiger Fire...BIA-OR-UMA
National Weather Service Pendleton OR
932 AM PDT Sat Aug 23 2025

Forecast is based on forecast start time of 0900 PDT on August 23.
***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 and hot conditions will settle across the fire
site today and will persist into the early next week. Winds will
be diurnally driven and forecast to be mostly light with locally
breezy afternoons possible. RHs will be in the upper single digits
to the mid teens each afternoon, with poor to moderate overnight
recovery,

.REST OF TODAY...

Sky/weather.........Mostly sunny (40-50 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....99-102.
Min humidity........9-14 percent.
Wind (20 ft)........Southwest winds 4 to 7 mph shifting to the
                    north 5 to 8 mph after 11AM.
Mixing height.......4200 ft AGL.
Transport winds.....Light winds becoming northeast 8 to 12 mph
after 11AM.
Ventilation Index...Poor (30) increasing to fair (280) in the
                    afternoon.

TIME (PDT)      9 AM   11 AM  1 PM   3 PM   5 PM   7 PM
Chc of ltng (%).0      0      0      0      0      0
Temp............76     86     93     97     97     93
RH..............26     19     16     14     14     16
20 ft wind......SW 5   N 6    N 6    N 8    N 8    N 8
20 ft wind gust.6      10     10     13     13     13

.TONIGHT...

Sky/weather.........Mostly cloudy (55-65 percent) then becoming
                    partly cloudy (40-50 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....Around 70.
Max humidity........29-34 percent.
Wind (20 ft)........North winds 5 to 8 mph shifting to the south 3
                    to 7 mph after 11PM.
Mixing height.......1000 ft AGL.
Transport winds.....Northeast 6 to 12 mph shifting to the south 4
                    to 7 mph after 8PM.
Ventilation Index...Poor (150) decreasing to poor (50) overnight.

.SUNDAY...

Sky/weather.........Mostly sunny (35-45 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....Around 100.
Min humidity........10-15 percent.
Wind (20 ft)........Light downslope winds becoming northwest 5 to 8 mph
after 11AM.
Mixing height.......5500 ft AGL.
Transport winds.....Southwest 5 to 6 mph shifting to the northwest
                    5 to 8 mph after 11AM.
Ventilation Index...Poor (50) increasing to poor (170) in the
                    afternoon.

$$
Forecaster...Lawhorn
Requested by...Sydney Thompson
Type of request...WILDFIRE
.TAG 2520450.0/PDT
.DELDT 08/23/25
.FormatterVersion 2.0.0
.EMAIL Jaydenvanpelt@gmail.com