271
FNUS76 KPDT 142348
FWSPDT

Spot Forecast for Welcome Station Rx Units 6 and 7...USFS
National Weather Service Pendleton OR
448 PM PDT Tue May 14 2024

Forecast is based on ignition time of 0800 PDT on May 15.
***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...A ridge of high pressure controls the region on
Wednesday keeping conditions quiet including light winds,
generally 10 mph or less, with clear skies and warm temperatures
into the upper 70`s. On Thursday a system will approach the
region and tighten the pressure gradient, causing westerly to
northwesterly winds to increasing during the mid to late morning
hours. This will be the main impact though, as precipitation is
unlikely.

.WEDNESDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....76-79.
Min humidity........21-26 percent.
Wind (20 ft)........Southeast winds 5 to 7 mph shifting to the
                    north 5 to 8 mph late in the morning.
Ridgetop wind.......Southeast winds 5 to 10 mph shifting to the
north 5 to 10 mph late in the morning.
Mixing height.......4800 ft AGL.
Transport winds.....North 5 to 12 mph.
Haines Index........2 to 4 or very low to low potential for large
                    plume dominated fire growth.

TIME (PDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM
Temp............51  58  63  67  69  73  74  74  75  74  72  70
RH..............59  51  41  34  30  27  25  24  25  27  31  37
20 FT wind dir..SE  SE  SE  NE  NE  NE  N   N   N   N   N   N
20 FT wind spd..5   5   5   7   7   7   8   8   8   8   8   8
20 FT wind gust.            10  10  10  11  11  11  10  10  10

.WEDNESDAY NIGHT...

Sky/weather.........Mostly clear (5-15 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....46-49.
Max humidity........66-71 percent.
Wind (20 ft)........North winds 5 to 8 mph shifting to the west 5
                    to 7 mph overnight.
Ridgetop wind.......North winds 5 to 10 mph shifting to the west
5 to 10 mph overnight.
Mixing height.......500 ft AGL.
Transport winds.....North 6 to 12 mph shifting to the southwest
                    around 6 mph overnight.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.

.THURSDAY...

Sky/weather.........Sunny (0-5 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....Around 80.
Min humidity........19-24 percent.
Wind (20 ft)........West winds 5 to 8 mph shifting to the northwest
                    8 to 15 mph late in the afternoon.
Ridgetop wind.......West winds 5 to 10 mph shifting to the northwest
10 to 18 mph late in the afternoon.
Mixing height.......6100 ft AGL early in the morning.
Transport winds.....West 5 to 10 mph increasing to around 18 mph
                    late in the afternoon.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.

$$
Forecaster...Goatley
Requested by...Jessie Creech
Type of request...PRESCRIBED
.TAG 2414211.0/PDT
.DELDT 05/14/24
.FormatterVersion 2.0.0
.EMAIL jessie.creech@usda.gov