Suppression Forecast
Issued by NWS Pendleton, OR

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FNUS76 KPDT 310124
FWSPDT

Spot Forecast for Cottonwood Creek Fire...Oregon Dept. of Forestry
National Weather Service Pendleton OR
624 PM PDT Fri Jul 30 2021

Forecast is based on forecast start time of 0600 PDT on July 31.
***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.

...RED FLAG WARNING IN EFFECT FROM NOON SATURDAY TO MIDNIGHT PDT
SATURDAY NIGHT...

.DISCUSSION...Southerly flow aloft will continue to push monsoon
moisture into the region through the weekend. Thunderstorm potential
will increase each afternoon as daytime heating increases surface
instability. Thunderstorms will have the potential to produce
abundant cloud to ground lightning strikes, gusty erratic winds,
and heavy rainfall at times. Afternoon min RHs are expected to
gradually increase through Sunday as moisture advects into the
region.

.SATURDAY...

Sky/weather.........Mostly cloudy (75-85 percent). Slight chance of
                    showers and thunderstorms.
CWR.................3 percent.
LAL.................3.
Max temperature.....85-88.
Min humidity........22-27 percent.
Wind (20 ft)........Light winds becoming south 5 to 10 mph in the
                    afternoon. Gusty and erratic winds expected
                    near thunderstorms.
Ridgetop wind.......South winds 10 to 15 mph. Gusty and erratic
winds expected near thunderstorms.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

.SATURDAY NIGHT...

Sky/weather.........Mostly cloudy (80-90 percent). Chance of
                    thunderstorms in the evening. Chance of showers
                    through the night.
CWR.................16 percent.
LAL.................3.
Min temperature.....70-74.
Max humidity........61-66 percent.
Wind (20 ft)........South winds 5 to 8 mph. Gusty and erratic winds
                    expected near thunderstorms in the evening.
Ridgetop wind.......South winds 9 to 13 mph. Gusty and erratic
winds expected near thunderstorms in the
evening.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

.SUNDAY...

Sky/weather.........Mostly cloudy (70-80 percent). Slight chance of
                    showers and thunderstorms in the morning, then
                    chance of showers and thunderstorms in the
                    afternoon.
CWR.................7 percent.
LAL.................3.
Max temperature.....86-89.
Min humidity........30-35 percent.
Wind (20 ft)........Southwest winds around 5 mph shifting to the
                    west 5 to 10 mph after 11 AM then shifting
to the northwest after 2 PM. Gusty and erratic
winds expected near thunderstorms.
Ridgetop wind.......Southwest winds around 7 mph shifting to the
west 7 to 13 mph after 11 AM then shifting to
the north after 2 PM. Gusty and erratic winds
expected near thunderstorms.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

$$
Forecaster...Lawhorn
Requested by...Allison Blair
Type of request...WILDFIRE
.TAG 2116684.0/PDT
.DELDT 07/30/21
.FormatterVersion 2.0.0
.EMAIL allison.blair@oregon.gov


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