303
FNUS76 KPDT 161630
FWSPDT

Spot Forecast for Iskuulpa...ODF
National Weather Service Pendleton OR
930 AM PDT Tue Jul 16 2024

Forecast is based on forecast start time of 0900 PDT on July 16.
***Thunderstorms imply gusty and erratic winds***
***Winds are 20 foot 10-minute averages***
***CWR-Chance of wetting rain 0.10 or greater***

If you have questions or concerns with this forecast, please
contact our office at (541) 276-8134.

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 10 PM PDT
WEDNESDAY...

.DISCUSSION...Hot, dry, and unstable conditions continue for the
region. Main concern over the next 36 hours will be the arrival of
a weather system that could produce dry thunderstorms for the
area, primarily during the morning and afternoon hours on
Wednesday. Confidence is on the lower end as to the exact
coverage of thunderstorms, but current thinking is that the
greatest threat for storms lies west of the site. Otherwise,
expect winds of less than 10 mph with shifting directions.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent). Patchy smoke in the
                    morning.
CWR.................0 percent.
LAL.................1.
Max temperature.....93-95.
Min humidity........8-13 percent.
Wind (20 ft)........West to northwest winds 4 to 7 mph shifting to
                    the southwest 5 to 6 mph late in the afternoon.
Ridgetop wind.......West to northwest winds 5 to 9 mph shifting to
                    the southwest 6 to 9 mph late in the afternoon.
Mixing height.......6900 ft AGL in the afternoon.
Transport winds.....Southwest around 5 mph shifting to the west
                    around 9 mph in the late morning and afternoon.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

TIME (PDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM
Temp............74  81  84  86  89  91  92  92  94  92  90  86
RH..............32  26  21  19  17  15  13  13  13  14  18  21
20 FT wind dir..VRB W   NW  NW  NW  NW  NW  NW  SW  SW  SW  E
20 FT wind spd..3   5   7   7   7   7   7   7   6   6   6   5
20 FT wind gust.                    10  10  10  7   7   7   6

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent). Slight chance of
                    showers and dry thunderstorms early in the
                    morning.
CWR.................2 percent.
LAL.................1 until 0500, then 2.
Min temperature.....68-72.
Max humidity........25-30 percent.
Wind (20 ft)........Southwest winds 4 to 7 mph becoming east to
                    southeast less than 5 mph during in the evening.
                    Gusty and erratic winds expected near
                    thunderstorms early in the morning.
Ridgetop wind.......Southwest winds 5 to 9 mph becoming east to
                    southeast around 5 mph during the evening.
Mixing height.......1000 ft AGL through the night.
Transport winds.....Southwest around 7 mph shifting to the east to
                    southeast 7 to 10 mph early in the evening.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.


.WEDNESDAY...

Sky/weather.........Mostly sunny (35-45 percent). Slight chance of
                    showers and dry thunderstorms.
CWR.................2 percent.
LAL.................2 until 1700, then 1.
Max temperature.....94-97.
Min humidity........14-19 percent.
Wind (20 ft)........East to northeast winds around 5 mph shifting
                    to the north 5 to 9 mph in the afternoon. Gusty
                    and erratic winds expected near thunderstorms.
Ridgetop wind.......East to northeast winds 5 to 7 mph shifting
                    to the north 6 to 11 mph in the afternoon.
Mixing height.......7000 ft AGL in the afternoon.
Transport winds.....Southeast 7 to 9 mph shifting to the north to
                    northeast late in the morning, then shifting
                    to the west around 8 mph late in the afternoon.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

$$
Forecaster...Perry
Requested by...Thompson
Type of request...WILDFIRE
.TAG 2418183.0/PDT
.DELDT 07/16/24
.FormatterVersion 2.0.0
.EMAIL orbmc@firenet.gov