500
FNUS76 KPDT 250122
FWSPDT

Spot Forecast for Puderbaugh 502 Rx...USFS
National Weather Service Pendleton OR
622 PM PDT Tue Sep 24 2024

Forecast is based on ignition time of 0600 PDT on September 25.
***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.

.DISCUSSION...An upper level low pressure system and surface cold
front will impact the fire area Wednesday. Winds will increase
through the day as the system approaches the fire, with the cold
front boundary expected to arrive between 5PM to 7PM. Winds will
shift to the northwest then north as well as weaken behind the
frontal passage. There is a chance for rain showers, with
isolated thunderstorms also possible through the early evening
hours. Before showers arrive, RHs are expected to dip into the
mid teens to lower 20s, but expect good to excellent overnight
recoveries.

.WEDNESDAY...

Sky/weather.........Sunny (10-20 percent) then becoming partly
                    sunny (55-65 percent). Chance of rain showers
                    and slight chance of thunderstorms late in the
                    afternoon.
CWR.................4 percent.
LAL.................1 until 1700, then 2.
Max temperature.....76-79.
Min humidity........16-21 percent.
Wind (20 ft)........South winds 7 to 13 mph increasing to
15 to 21 mph after 10AM. Gusty and erratic
                    winds expected near thunderstorms late in the
                    afternoon.
Ridgetop wind.......South winds 9 to 14 mph increasing to
16 to 22 mph after 10AM.
Mixing height.......7000 ft AGL early in the morning.
Transport winds.....South 12 to 18 mph increasing to around 26 mph
                    late in the afternoon, then shifting to the
                    west around 18 mph late in the afternoon.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (PDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Temp............54     55     66     73     76     76
RH..............56     53     34     28     23     21
20 ft wind......S 11   S 14   S 14   S 18   S 21   S 21
20 ft wind gust.13     16     16     19     24     24

.WEDNESDAY NIGHT...

Sky/weather.........Mostly cloudy (70-80 percent) then becoming
                    partly cloudy (20-30 percent). Slight chance of
                    thunderstorms early in the evening. Chance of
                    rain showers.
CWR.................6 percent.
LAL.................2 until 2000, then 1.
Min temperature.....46-49.
Max humidity........85-90 percent.
Wind (20 ft)........South winds 12 to 18 mph shifting to the
northwest 7 to 12 mph after 8PM, then shifting
to the north 5 to 10 mph after 11PM. Gusty and
                    erratic winds expected near thunderstorms early
                    in the evening.
Ridgetop wind.......South winds 12 to 20 mph shifting to the
north 5 to 12 mph after 8PM.
Mixing height.......500 ft AGL in the evening and overnight.
Transport winds.....West around 18 mph shifting to the north 6 to
                    15 mph early in the evening.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

.THURSDAY...

Sky/weather.........Sunny (10-20 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....Around 70.
Min humidity........26-31 percent.
Wind (20 ft)........North winds 5 to 8 mph shifting to the south 5
                    to 11 mph after 11AM.
Ridgetop wind.......North winds 5 to 10 mph shifting to the south
7 to 13 mph after 11AM.
Mixing height.......4500 ft AGL early in the morning.
Transport winds.....North around 6 mph shifting to the south 5 to
                    14 mph early in the morning, then shifting to
                    the southwest 16 to 18 mph late in the
                    afternoon.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

$$
Forecaster...Lawhorn
Requested by...Todd Pederson
Type of request...PRESCRIBED
.TAG 2422933.1/PDT
.DELDT 09/24/24
.FormatterVersion 2.0.0
.EMAIL todd.pederson@usda.gov