994
FNUS76 KPDT 270357
FWSPDT

Spot Forecast for Rocky 79...USFS
National Weather Service Pendleton OR
857 PM PDT Sun May 26 2024

Forecast is based on ignition time of 0000 PDT on May 27.
***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...High pressure aloft will gradually shift east
through early Tuesday, resulting in warm, dry conditions and
light diurnal winds persisting through Monday night. Tuesday,
and upper low pressure system will bring rain shower
chances(20-30%), though chances of wetting rain will be less
than 10%. West winds will increase Tuesday afternoon to
10 to 15 mph, with gusts to around 25 mph. Minimum RHs will
be in the mid 30s to 40s each afternoon, with excellent
overnight recoveries.

.REST OF TONIGHT...

Sky/weather.........Mostly clear (15-25 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....44-47.
Max humidity........79-84 percent.
Wind (20 ft)........Light drainage winds.
Mixing height.......900 ft AGL.
Transport winds.....West around 5 mph overnight becoming light.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (PDT)      MIDNGT 2 AM   4 AM   6 AM   8 AM   10 AM
Temp............49     46     45     45     54     63
RH..............75     80     82     80     67     55
20 ft wind......NW 4   NW 4   NW 4   SW 3   E 3    E 3
20 ft wind gust.

.MEMORIAL DAY...

Sky/weather.........Mostly sunny (35-45 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....75-78.
Min humidity........35-40 percent.
Wind (20 ft)........Light winds becoming southeast 5 to 7 mph late
                    in the afternoon, then shifting to the
                    northwest late in the afternoon.
Mixing height.......5600 ft AGL.
Transport winds.....Light winds becoming southwest around 6 mph
                    late in the morning, then shifting to the west
                    7 to 8 mph late in the afternoon.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

.MONDAY NIGHT...

Sky/weather.........Partly cloudy (35-45 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....48-51.
Max humidity........74-79 percent.
Wind (20 ft)........Northwest winds 5 to 8 mph shifting to the west
                    around 5 mph early in the morning.
Mixing height.......900 ft AGL.
Transport winds.....West 6 to 8 mph.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

.TUESDAY...

Sky/weather.........Partly sunny (55-65 percent). Chance of rain
                    showers late in the afternoon.
CWR.................1 percent.
LAL.................1.
Max temperature.....66-69.
Min humidity........45-50 percent.
Wind (20 ft)........West winds 4 to 8 mph increasing to
10 to 13 mph in the afternoon. Gusts up to
25 mph late in the afternoon.
Mixing height.......4400 ft AGL.
Transport winds.....West 6 to 15 mph increasing to 23 to 25 mph
                    late in the afternoon.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

$$
Forecaster...Lawhorn
Requested by...Andrew Bellairs
Type of request...PRESCRIBED
.TAG 2415117.0/PDT
.DELDT 05/27/24
.FormatterVersion 2.0.0
.EMAIL richard.lancaster@usda.gov,andrew.s.bellairs@usda.gov