274
FNUS76 KPDT 062133
FWSPDT

Spot Forecast for SAFR #267...USFS
National Weather Service Pendleton OR
233 PM PDT Mon May 6 2024

Forecast is based on ignition time of 0900 PDT on May 07.
***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 weak, passing system Tuesday morning will allow
for partly to mostly cloudy skies during ignition time, but will
break up through the remainder of the day. Winds will be
increasing through the morning before peaking between 11 AM and 3
PM. Winds will slowly slacken through the evening as skies clear
overnight into Wednesday due to an upper level ridge infiltrating
into the region from the west. Excellent overnight recoveries are
expected, with high temperatures increasing about 10 degrees and
minimum humidities dropping 20 to 25% on Wednesday.

.TUESDAY...

Sky/weather.........Partly sunny (50-60 percent) then becoming
                    sunny (20-30 percent).
CWR.................3 percent.
LAL.................1.
Max temperature.....Around 50.
Min humidity........46-51 percent.
Wind (20 ft)........West northwest winds 8 to 14 mph with gusts
                    near 20 mph in the afternoon.
Ridgetop wind.......West northwest winds 11 to 16 mph with gusts
                    up to 23 mph in the afternoon.
Mixing height.......5200 ft AGL.
Transport winds.....West 24 to 25 mph.
Haines Index........2 to 4 or very low to low potential for large
                    plume dominated fire growth.

TIME (PDT)      9 AM   11 AM  1 PM   3 PM   5 PM   7 PM
Temp............35     42     46     47     46     44
RH..............71     58     53     52     54     62
20 ft wind......W 13   W 15   W 15   W 13   NW 12  NW 12
20 ft wind gust.18     18     18     17     14     14

.TUESDAY NIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....25-28.
Max humidity........82-87 percent.
Wind (20 ft)........West winds 5 to 10 mph becoming light
                    overnight.
Ridgetop wind.......West winds 6 to 12 mph becoming light
                    overnight.
Mixing height.......500 ft AGL.
Transport winds.....West 18 to 24 mph decreasing to 9 to 14 mph
                    late in the evening.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

.WEDNESDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....59-62.
Min humidity........29-34 percent.
Wind (20 ft)........Light and variable winds becoming northeast 4
                    to 8 mph late in the morning.
Ridgetop wind.......Light and variable winds becoming northeast 6
                    to 12 mph late in the morning.
Mixing height.......4100 ft AGL early in the morning.
Transport winds.....Northwest 7 to 9 mph shifting to the north 9 to
                    14 mph late in the morning.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

$$
Forecaster...Callihan
Requested by...Jyota Smith-Howard
Type of request...PRESCRIBED
.TAG 2413291.0/PDT
.DELDT 05/06/24
.FormatterVersion 2.0.0
.EMAIL jyota.smithhoward@usda.gov