409
FNUS76 KPDT 221526
FWSPDT

Spot Forecast for Tiger Fire...BIA-OR-UMA
National Weather Service Pendleton OR
826 AM PDT Fri Aug 22 2025

Forecast is based on forecast start time of 0900 PDT on August 22.
***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...A drying and warming trend will result in temperatures
increasing to around 100 degrees by tomorrow afternoon, with
afternoon RHs in the upper single digits to mid teens. Winds will be
less than 10 mph, with diurnally driven wind shifts in the afternoon
and overnight. Overnight recoveries will be poor. Overnight inversions
will develop around 11PM and lower overnight, then breaking between
10AM to 1PM.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....95-98.
Min humidity........10-15 percent.
Wind (20 ft)........East winds 4 to 7 mph shifting to the north 5
                    to 8 mph after 10AM, then shifting to
                    the northeast after 5PM.
Mixing height.......5400 ft AGL.
Transport winds.....Light winds becoming north 7 to 8 mph late in
                    the morning.
Ventilation Index...Poor (30) increasing to fair (310) 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............73     82     89     92     94     89
RH..............31     23     18     16     14     18
20 ft wind......E 5    N 7    N 7    N 8    NE 8   NE 8
20 ft wind gust.6      10     10     12     12     12

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....61-64.
Max humidity........34-39 percent.
Wind (20 ft)........Northeast winds 5 to 8 mph shifting to the
                    southeast 4 to 7 mph after 11PM.
Mixing height.......1000 ft AGL.
Transport winds.....Northeast 6 to 8 mph shifting to the southeast
                    5 to 6 mph late in the evening.
Ventilation Index...Poor (130) decreasing to poor (40) overnight.

.SATURDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
Chance of lightning.1 percent.
Max temperature.....Around 100.
Min humidity........9-14 percent.
Wind (20 ft)........South winds 4 to 7 mph becoming light after 7AM,
then shifting to the north 5 to 8 mph after 11AM.
Mixing height.......4400 ft AGL.
Transport winds.....South around 6 mph early in the morning
                    becoming light, then becoming north 5 to 9 mph
                    late in the morning.
Ventilation Index...Poor (40) increasing to poor (180) in the
                    afternoon.

$$
Forecaster...Lawhorn
Requested by...Sydney Thompson
Type of request...WILDFIRE
.TAG 2520450.0/PDT
.DELDT 08/22/25
.FormatterVersion 2.0.0
.EMAIL Jaydenvanpelt@gmail.com