069
FNUS76 KPDT 261506
FWSPDT

Spot Forecast for How Go...Roslyn Fire
National Weather Service Pendleton OR
806 AM PDT Thu Sep 26 2024

Forecast is based on ignition time of 0800 PDT on September 26.
***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...Dry weather is expected through the period.
Winds will decrease during the day today into early tonight
then increase towards Friday morning and into the day Friday.

MIN RH values will be around 25 to 30 percent and 50 to 55 percent
on Friday with excellent overnight recoveries.

.REST OF TODAY...

Sky/weather.........Mostly sunny (20-30 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....64-67.
Min humidity........24-29 percent.
Wind (20 ft)........West winds around 5 to 10 mph with gusts to 15 mph
                    in the morning, shifting to the
                    southeast 5 to 6 mph in the afternoon.
Ridgetop wind.......West wind 10 to 20 mph early, decreasing to 5 to
                    10 mph in the afternoon and shifting to the south
                    in the late afternoon.
Mixing height.......3500 ft AGL.
Transport winds.....Southwest around 8 mph.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent) then becoming
                    mostly cloudy (50-60 percent). Slight chance of
                    rain showers.
CWR.................2 percent.
LAL.................1.
Min temperature.....46-49.
Max humidity........86-91 percent.
Wind (20 ft)........Northeast winds 5 to 6 mph shifting to the west
                    5 to 10 mph overnight.
Ridgetop wind.......South winds 5 to 10 mph, shifting to the west and
                    increasing to 20 to 30 mph by morning.
Mixing height.......2300 ft AGL early in the evening then 800 ft
                    AGL overnight.
Transport winds.....West around 8 mph.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

.FRIDAY...

Sky/weather.........Mostly sunny (30-40 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....63-66.
Min humidity........50-55 percent.
Wind (20 ft)........West winds 5 to 10 mph. Gusts up to 21 mph in
                    the afternoon.
Ridgetop wind.......Northwest winds 15 to 25 mph, with gusts to 30 mph.
Mixing height.......2900 ft AGL.
Transport winds.....West around 15 mph.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

$$
Forecaster...Nierenberg
Requested by...Chris Martin
Type of request...PRESCRIBED
.TAG 2423024.1/PDT
.DELDT 09/26/24
.FormatterVersion 2.0.0
.EMAIL chris.martin@roslynfire.org