047
FNUS76 KPDT 242056
FWSPDT

Spot Forecast for SLIDE RANCH...SE WA IMT
National Weather Service Pendleton OR
156 PM PDT Mon Jun 24 2024

Forecast is based on forecast start time of 1500 PDT on June 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 ridge of high pressure will facilitate
warm, dry conditions and diurnally driven winds Tuesday. Tuesday night
through Wednesday, an incoming upper-level low pressure system will
usher in a slight chance (15%) of nocturnal to early-morning showers and
thunderstorms over the burn site. Another round of convection during the
afternoon is forecast (15% chance), but thunderstorm chances will be highest
over the adjacent high terrain, especially the Cascade east slopes. Winds
will become westerly and stronger Wednesday afternoon and evening. Any
showers and thunderstorms that develop will be capable of producing erratic,
gusty outflow winds.

.TUESDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....91-94.
Min humidity........14-19 percent.
Wind (20 ft)........Becoming east winds 3-6 mph by mid-morning.
Mixing height.......Increasing to 6000-7000 ft AGL by afternoon.
Transport winds.....Southeast to southwest 5-8 mph.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

.TUESDAY NIGHT...

Sky/weather.........Mostly clear (0-10 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....60-63.
Max humidity........52-57 percent.
Wind (20 ft)........South winds 3-5 mph in the evening, shifting to
                    the west-northwest 3-7 mph overnight.
Mixing height.......Decreasing to 300-600 ft AGL overnight.
Transport winds.....Becoming west to northwest 4-8 mph.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

.WEDNESDAY...

Sky/weather.........Mostly sunny (35-45 percent). Slight chance of
                    showers and thunderstorms. High-based showers and
                    isolated thunderstorms are forecast in the early
                    to late morning followed by a another round of showers
                    and thunderstorms in the afternoon. Afternoon showers
                    and thunderstorms are more likely over the adjacent high
                    terrain, especially the Cascade east slopes.
CWR.................3 percent.
LAL.................2.
Max temperature.....86-89.
Min humidity........19-24 percent.
Wind (20 ft)........West-northwest winds 4-6 mph early morning,
                    becoming southwest to west 12-17 mph with gusts of
                    20-30 mph in the afternoon. Gusty and erratic winds
                    may occur near thunderstorms.
Mixing height.......Increasing to 8000-9000 ft AGL by afternoon.
Transport winds.....West 10-15 mph, strongest in the afternoon.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

$$
Forecaster...Plunkett
Requested by...David Winter
Type of request...WILDFIRE
.TAG 2416553.2/PDT
.DELDT 06/24/24
.FormatterVersion 2.0.0
.EMAIL david_winter@firenet.gov