707
FNUS76 KPDT 162110
FWSPDT

Spot Forecast for ALDER SPRINGS...USFS
National Weather Service Pendleton OR
210 PM PDT Mon Jun 16 2025

Forecast is based on forecast start time of 1400 PDT on June 16.
***Thunderstorms imply gusty and erratic winds***
***Winds are 20 foot 10-minute averages***
***CWR-Chance of wetting rain 0.10 or greater***
***Ventilation Index is derived from the
   transport wind multiplied by the mixing
   height in 100`s of feet. Index categories
   are a generalized indicator only.***

If you have questions or concerns with this forecast, please
contact our office at (541) 276-8134.

.DISCUSSION...A weak system moving through the area today will
produce breezy northwest winds at the fire site, with winds
becoming drainage winds after 9PM. Tomorrow, winds are
expected to remain 10 mph. RHs will dip into the upper teens to
low 20s this and tomorrow afternoon, with good overnight recovery
expected.

.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....81-84.
Min humidity........17-22 percent.
Wind (20 ft)........Northwest winds 8 to 13 mph with gusts to
around 20 mph.
Ridgetop wind.......Northwest winds 10 to 15 mph with gusts to
around 23 mph.
Mixing height.......8500 ft AGL.
Transport winds.....West around 14 mph.
Ventilation Index...Good (660).

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....45-48.
Max humidity........62-67 percent.
Wind (20 ft)........Northwest winds 7 to 12 mph with gusts to
                    around 20 mph in the evening becoming light
drainage winds after 9PM.
Ridgetop wind.......Northwest winds 9 to 14 mph becoming
becoming west winds 4 to 8 mph after 10PM,
then shifting to the south after 1AM.
Mixing height.......500 ft AGL.
Transport winds.....West around 8 mph.
Ventilation Index...Fair (420) decreasing to poor (30) overnight.

.TUESDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....82-85.
Min humidity........17-22 percent.
Wind (20 ft)........Drainage winds becoming west 5 to 10 mph after
2PM.
Ridgetop wind.......South winds 4 to 8 mph becoming west winds
6 to 12 mph after 2PM
Mixing height.......6900 ft AGL.
Transport winds.....West around 12 mph.
Ventilation Index...Poor (70) increasing to excellent (710) in the
                    afternoon.

$$
Forecaster...Lawhorn
Requested by...ANDREW MYHRA
Type of request...WILDFIRE
.TAG 2516058.0/PDT
.DELDT 06/16/25
.FormatterVersion 2.0.0
.EMAIL ANDREW.MYHRA@USDA.GOV,ORCOC@FIRENET.GOV