304
FNUS76 KPDT 070002
FWSPDT

Spot Forecast for Rocky 79...USFS
National Weather Service Pendleton OR
502 PM PDT Thu Jun 6 2024

Forecast is based on ignition time of 1700 PDT on June 06.
***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 over the
PacNW will persist through Friday resulting in light, diurnally
and terrain-driven winds, above-normal afternoon temperatures,
and low afternoon RHs. Overnight RH recovery is expected to be
on the upper end of moderate to low end of good.

.REST OF TODAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....83-85.
Min humidity........22-25 percent.
Wind (20 ft)........East-northeast 3-5 mph, becoming drainage
                    2-4 mph this evening.
Ridgetop wind.......East-northeast 3-5 mph.
Mixing height.......4500-5000 ft AGL.
Transport winds.....Northwest 4-6 mph.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

TIME (PDT)      5 PM   7 PM   9 PM   11 PM  1 AM   3 AM
Temp............83     78     68     63     61     57
RH..............25     34     44     51     52     57
20 ft wind......ENE 5  VRB 5    VRB 3  NW 3   NW 2   NW 2
20 ft wind gust.10

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....55-58.
Max humidity........56-61 percent.
Wind (20 ft)........Drainage winds 2-4 mph.
Ridgetop wind.......East-northeast 2-4 mph.
Mixing height.......Decreasing to 400-800 ft AGL overnight.
Transport winds.....West 4-6 mph.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

.FRIDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....86-89.
Min humidity........23-28 percent.
Wind (20 ft)........Becoming upslope, up-valley 3-5 mph in the
                    morning. Northeast 5-8 mph late morning through
                    afternoon.
Ridgetop wind.......Becoming upslope, up-valley 3-5 mph in the
                    morning. Northeast 6-9 mph late morning through
                    afternoon.
Mixing height.......Increasing to 3800-4300 ft AGL by afternoon.
Transport winds.....Becoming east-northeast 5-8 mph early in
                    the morning.
Haines Index........3 to 5 or very low to moderate potential for
                    large plume dominated fire growth.

$$
Forecaster...Plunkett
Requested by...Andrew Bellairs
Type of request...PRESCRIBED
.TAG 2415667.1/PDT
.DELDT 06/06/24
.FormatterVersion 2.0.0
.EMAIL andrew.s.bellairs@usda.gov,richard.lancaster@usda.gov