228
FNUS76 KPDT 281059
FWSPDT

Spot Forecast for Rocky 79...USFS
National Weather Service Pendleton OR
359 AM PDT Tue May 28 2024

Forecast is based on ignition time of 0600 PDT on May 28.
***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...An upper level trough and surface cold front will move
across the area today.  There is a slight chance of showers early
this afternoon and a better chance late this afternoon, but rainfall
amounts should be light.  Winds will increase this afternoon and evening,
then decrease overnight before increasing again on Wednesday.  However,
winds on Wednesday should be less than on Tuesday.

Temperatures on Wednesday will also be cooler than on Tuesday.  MIN RH
values will be 45 to 50 percent today and around 35 to 40 percent on
Wednesday with excellent overnight recoveries.


.TODAY...

Sky/weather.........Mostly cloudy (65-75 percent). Slight chance of
                    rain showers (20%) in the afternoon. Chance of
                    rain showers (40%) late in the afternoon and
                    early evening.
CWR.................0 percent.
LAL.................1.
Max temperature.....63-66.
Min humidity........45-50 percent.
Wind (20 ft)........West winds 5 to 13 mph. Gusts up to 26 mph in the
                    afternoon.
Ridgetop wind.......West wind 15 to 20 mph with gusts 25 to 30 mph in
                    the afternoon.
Mixing height.......4300 ft AGL early in the morning.
Transport winds.....West 7 to 13 mph increasing to around 17 mph
                    late in the afternoon.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

TIME (PDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Temp............49     56     60     61     62     60
RH..............79     65     57     51     53     54
20 ft wind......W 6    W 8    W 8    W 11   W 13   W 13
20 ft wind gust.7      14     14     18     21     21

.TONIGHT...

Sky/weather.........Mostly cloudy (70-80 percent) then becoming
                    partly cloudy (30-40 percent). Chance of rain
                    showers (40%) early in the evening.
CWR.................0 percent.
LAL.................1.
Min temperature.....40-43.
Max humidity........74-79 percent.
Wind (20 ft)........West winds 5 to 12 mph with gusts to around 26
                    mph in the evening shifting to the southwest 5 to 10
                    mph overnight.
Ridgetop wind.......West wind 15 to 20 mph with gusts to 25 mph.
Mixing height.......1000 ft AGL.
Transport winds.....West 10 to 17 mph decreasing to 5 to 7 mph
                    overnight.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

.WEDNESDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....59-62.
Min humidity........37-42 percent.
Wind (20 ft)........West winds 5 to 12 mph. Gusts up to 25 mph in the
                    afternoon.
Ridgetop wind.......West wind 15 to 20 mph early, shifting to northwest and
                    decreasing to 10 to 15 mph in the afternoon with
                    gusts to 20 to 25 mph.
Mixing height.......6500 ft AGL.
Transport winds.....West 7 to 12 mph.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

$$
Forecaster...Nierenberg
Requested by...Andrew Bellairs
Type of request...PRESCRIBED
.TAG 2415117.1/PDT
.DELDT 05/28/24
.FormatterVersion 2.0.0
.EMAIL richard.lancaster@usda.gov,andrew.s.bellairs@usda.gov