656
FNUS76 KPDT 112158
FWSPDT

Spot Forecast for Aerial Ignition...WSA
National Weather Service Pendleton OR
258 PM PDT Sun May 11 2025

Forecast is based on ignition time of 0700 PDT on May 12.
***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...Main fire concern will be chance of lightning with
potential for thunderstorms, 15-20 percent, in the afternoon on
Monday. Unsettled conditions will largely prevail through the
period as an upper low moves across the prescribed fire area.
Westerly winds expected both Monday and Tuesday with Tuesday
likely to hold strongest gusts up to 25 mph. High recovery
expected Monday night.

.MONDAY...

Sky/weather.........Partly sunny (65-75 percent). Rain showers
                    through the day. Slight chance of thunderstorms
                    in the afternoon.
CWR.................10 percent.
Chance of lightning.20 percent.
Max temperature.....53-55.
Min humidity........47-52 percent.
Wind (20 ft)........Light upslope winds 2 to 4 mph becoming west 6
                    to 11 mph by late morning with gusts 15 to
                    20 mph. Winds becoming west northwest in the
                    afternoon. Gusty and erratic winds expected
                    near any thunderstorms in the afternoon.
Ridgetop wind.......West winds around 5 mph becoming west northwest
                    around 10 mph with gusts 15 to 20 in the
                    afternoon.
Mixing height.......5400 ft AGL.
Transport winds.....West 10 to 15 mph.

TIME (PDT)      7 AM   9 AM   11 AM  1 PM   3 PM   5 PM
Chc of ltng (%).10     10     10     10     20     20
Temp............41     43     46     50     53     52
RH..............82     77     67     57     50     48
20 ft wind......SW 3   SW 5   W 8    W 9    W 12   W 11
20 ft wind gust.              15     17     18     16

.MONDAY NIGHT...

Sky/weather.........Mostly cloudy (55-65 percent). Slight chance of
                    thunderstorms early in the evening. Chance of
                    rain showers in the evening.
CWR.................15 percent.
Chance of lightning.20 percent decreasing to 5 percent after 2200.
Min temperature.....40-43.
Max humidity........79-85 percent.
Wind (20 ft)........West winds around 10 mph with gusts 15 to 20 mph
                    becoming west 5 to 10 mph after 2200. Gusty and
                    erratic winds expected near any thunderstorms
                    early in the evening.
Ridgetop wind.......West winds around 10 mph becoming 5 mph overnight.
Mixing height.......500 ft AGL in the evening and overnight.
Transport winds.....West 10 to 15 mph becoming 5 mph after 2400.

.TUESDAY...

Sky/weather.........Partly sunny (55-65 percent). Chance of rain
                    showers.
CWR.................15 percent.
Chance of lightning.5 percent.
Max temperature.....54-57.
Min humidity........55-60 percent.
Wind (20 ft)........Light upslope winds 2 to 4 mph becoming west
                    winds 7 to 12 mph late morning with gusts up
                    to 25 mph in the afternoon.
Ridgetop wind.......West winds around 5 mph increasing to around
                    15 mph with gusts up to 25 mph in the
                    afternoon.
Mixing height.......4200 ft AGL.
Transport winds.....West 10 to 15 mph.

$$
Forecaster...Townsend
Requested by...Trey Leonard
Type of request...PRESCRIBED
.TAG 2513747.0/PDT
.DELDT 05/11/25
.FormatterVersion 2.0.0
.EMAIL trey.leonard@ctwsbnr.org