213 
FNUS76 KPDT 300422
FWSPDT

Spot Forecast for MCCORMICK MEADOWS FIRE...YAKAMA AGENCY
National Weather Service Pendleton OR
922 PM PDT Tue Jul 29 2025

Forecast is based on forecast start time of 0600 PDT on July 30. 
***Thunderstorms imply gusty and erratic winds***
***Winds are 20 foot 10-minute averages***
***CWR-Chance of wetting rain 0.10 or greater***
***Ventilation Index is derived from the
   transport wind multiplied by the mixing
   height in 100's of feet. Index categories
   are a generalized indicator only.***

If you have questions or concerns with this forecast, please
contact our office at (541) 276-8134.

...RED FLAG WARNING IN EFFECT FROM 1 PM TO 9 PM WEDNESDAY FOR 
ABUNDANT LIGHTNING FOR FIRE WEATHER ZONE WA694...

.DISCUSSION...The region remains locked under a weather pattern
favorable for afternoon showers and thunderstorms. A Red Flag
Warning is in effect for Wednesday for the Washington Cascades as
a result. More widespread shower and thunderstorm coverage is 
then expected beginning overnight headed into Thursday morning.
Winds are expected to be light, expect for in the vicinity of
thunderstorms, where outflow winds could gust over 40 mph at
times. 

.WEDNESDAY...

Sky/weather.........Partly cloudy (45-55 percent). Slight chance of 
                    showers and thunderstorms late in the morning
                    (15-25 percent). 
CWR.................0 percent. 
Chance of lightning.20 percent. 
Max temperature.....82-85. 
Min humidity........23-28 percent. 
Wind (20 ft)........Southwest winds around 5 mph early, becoming
                    Northwest 5 to 8 mph by the late morning. Gusty 
                    and erratic winds expected near thunderstorms.
Ridgetop wind.......East winds 5 to 10 mph, shifting to the West by
                    the afternoon.  
Mixing height.......8600 ft AGL. 
Transport winds.....East-Northeast winds 6 to 10 mph, shifting
                    to the North by the afternoon. 
Ventilation Index...Poor (70) increasing to fair (220) in the 
                    afternoon. 

TIME (PDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM   
Chc of ltng (%).0      0      0      20     20     20     
Temp............61     69     77     81     81     79     
RH..............40     37     31     29     31     34     
20 ft wind......SW 5   SW 5   NW 5   NW 6    NW 7   NW 7   
20 ft wind gust.7      6      6      7      8      8      

.WEDNESDAY NIGHT...

Sky/weather.........Partly cloudy (35-45 percent). Slight chance of 
                    showers and thunderstorms in the evening and 
                    overnight (15-25 percent). 
CWR.................8 percent. 
Chance of lightning.28 percent. 
Min temperature.....59-62. 
Max humidity........46-51 percent. 
Wind (20 ft)........Northwest winds 5 to 8 mph, shifting Southwest 
                    overnight. Gusty and erratic winds expected
                    near thunderstorms.
Ridgetop wind.......Northwest winds 5 to 10 mph.  
Mixing height.......900 ft AGL. 
Transport winds.....North-northwest 7 to 12 mph. 
Ventilation Index...Poor (160) decreasing to poor (70) overnight. 

.THURSDAY...

Sky/weather.........Partly cloudy (45-55 percent). Chance of showers 
                    and thunderstorms (30-40 percent). 
CWR.................8 percent increasing to 24 percent late in the 
                    morning, then decreasing to 14 percent late in 
                    the afternoon. 
Chance of lightning.28 percent. 
Max temperature.....76-79. 
Min humidity........40-45 percent. 
Wind (20 ft)........Northwest winds 5 to 10 mph. Gusty and erratic 
                    winds expected near thunderstorms. 
Ridgetop wind.......North-Northwest winds 5 to 10 mph.  
Mixing height.......3600 ft AGL. 
Transport winds.....Northwest 9 to 14 mph. 
Ventilation Index...Poor (90) increasing to fair (260) in the 
                    afternoon. 

$$
Forecaster...Evans
Requested by...SAMANTHA WATLAMET
Type of request...WILDFIRE
.TAG 2518851.0/PDT
.DELDT 07/30/25
.FormatterVersion 2.0.0
.EMAIL samantha_watlamet@yakama.com