National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FNUS76 KPDT 192053
FWSPDT

Spot Forecast for Morrison road prescribed fire...Kittitas Valley Fire & Rescue
National Weather Service Pendleton OR
153 PM PDT Fri Apr 19 2024

Forecast is based on ignition time of 0800 PDT on April 20.
***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...Dry conditions are expected Saturday.  A cold front
cross the area between 4 and 8 PM and winds will steadily increase
behind the front from the west Saturday night and into Sunday.
Expect shifting winds around the time of frontal passage.  Winds
will increase to 30 to 35 mph on Sunday.

There will be a slight chance of rain Saturday evening with the
front, otherwise it will be dry.

Min RH values will be 20 to 25 percent on Saturday, and 25 to 30
percent on Sunday with good recovery overnight.

.SATURDAY...

Sky/weather.........Mostly sunny (20-30 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....62-65.
Min humidity........20-25 percent.
Wind (20 ft)........East winds 5 to 10 mph, increasing to 15
                    mph during the evening.
Ridgetop wind.......East wind 10 to 15 mph early, shifting to the
                    South during the afternoon and eventually west
                    during the evening.
Mixing height.......4700 ft AGL.
Transport winds.....East around 16 mph.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

.SATURDAY NIGHT...

Sky/weather.........Mostly cloudy (65-75 percent) then becoming
                    mostly clear (5-15 percent). Slight chance of
                    rain showers in the evening.
CWR.................4 percent.
LAL.................1.
Min temperature.....34-37.
Max humidity........67-72 percent.
Wind (20 ft)........West winds 10 to 15 mph, becoming gusty with
                    gusts 25 to 30 mph by morning.
Ridgetop wind.......Winds becoming west during the evening at
                    20 to 30 mph with gusts 30 to 35 mph, possibly
                    as high as 40 mph.
Mixing height.......600 ft AGL.
Transport winds.....West around 19 mph.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

.SUNDAY...

Sky/weather.........Sunny (20-30 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....56-59.
Min humidity........26-31 percent.
Wind (20 ft)........West winds 10 to 20 with gusts 30 to 35 mph.
Ridgetop wind.......West winds becoming northwest 25 to 30 mph with gusts to
                    35 mph, decreasing to 10 to 20 mph with gusts 25 to 30
                    mph in the afternoon.
Mixing height.......6700 ft AGL.
Transport winds.....West around 23 mph.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

$$
Forecaster...Nierenberg
Requested by...Kris Vanicek
Type of request...PRESCRIBED
.TAG 2411433.0/PDT
.DELDT 04/19/24
.FormatterVersion 2.0.0
.EMAIL Vanicekk@kvfr.org