186
FNUS76 KPDT 121718
FWSPDT

Spot Forecast for SAFR 15...USFS
National Weather Service Pendleton OR
1018 AM PDT Sun May 12 2024

Forecast is based on ignition time of 0600 PDT on May 13.
***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 weather system will increase
winds from the northwest between 6-12 mph, with increases
to 15 mph and gusts up to 20 mph in the afternoon Monday.
Minimum relative humidities Monday will be on the rise to
upper 20s to lower 30s. Winds will decrease overnight, but
will increase to 5-10 mph from the north Tuesday afternoon
with minimum RHs decreasing to lower to mid 20s. RH recoveries
will be excellent in the overnight hours.


.MONDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....71-74.
Min humidity........27-32 percent.
Wind (20 ft)........Light winds becoming northwest 6 to 12 mph late
                    in the morning.
Mixing height.......6200 ft AGL early in the morning.
Transport winds.....West 10 to 17 mph.
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............43     50     62     68     72     71
RH..............80     64     45     35     32     34
20 ft wind......SW 4   N 3    N 3    NW 7   NW 10  NW 10
20 ft wind gust.                            11     11

.MONDAY NIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....39-42.
Max humidity........75-80 percent.
Wind (20 ft)........Northwest winds 6 to 12 mph in the evening and
                    overnight becoming light.
Mixing height.......1400 ft AGL in the evening.
Transport winds.....West 10 to 17 mph decreasing to 5 to 7 mph
                    overnight.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

.TUESDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....71-74.
Min humidity........22-27 percent.
Wind (20 ft)........Light winds becoming north 5 to 10 mph late in
                    the afternoon.
Mixing height.......4800 ft AGL early in the morning.
Transport winds.....West around 6 mph shifting to the north 8 to 13
                    mph early in the morning.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.

$$
Forecaster...Lawhorn
Requested by...Kiel Wood
Type of request...PRESCRIBED
.TAG 2413622.0/PDT
.DELDT 05/12/24
.FormatterVersion 2.0.0
.EMAIL kiel.wood@usda.gov