294
FNUS76 KPDT 311223
FWSPDT

Spot Forecast for McCormick Meadows...Yakama Agency
National Weather Service Pendleton OR
523 AM PDT Thu Jul 31 2025

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***
***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.

.DISCUSSION...A couple isolated showers and thunderstorms are
possible late this afternoon across the fire area. Storms will be
capable of producing lightning strikes, gusty winds, and heavy
downpours. Conditions dry out tonight with another chance of
showers and an isolated thunderstorm in the afternoon. Friday will
be a few degrees cooler.

.TODAY...

Sky/weather.........Mostly sunny (45-55 percent) then becoming
                    mostly cloudy (65-75 percent). Chance of
                    showers in the morning, then a chance of
                    showers and slight chance of thunderstorms late
                    in the afternoon.
Max temperature.....76-79.
Min humidity........35-40 percent.
Wind (20 ft)........Northwest winds 5 to 8 mph shifting to the west
                    5 to 11 mph late in the morning. Gusty and
                    erratic winds expected near thunderstorms late
                    in the afternoon.
Mixing height.......4900 ft AGL.
Transport winds.....Northwest 6 to 9 mph shifting to the south
                    around 6 mph late in the morning, then shifting
                    to the northwest 8 to 16 mph late in the
                    afternoon.
Ventilation Index...Poor (70) increasing to poor (200) in the
                    afternoon.

TIME (PDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Temp............61     64     71     73     73     71
RH..............44     46     39     40     42     48
20 ft wind......NW 8   W 7    W 7    W 7    NW 8   NW 8
20 ft wind gust.10     10     10     10     13     13

.TONIGHT...

Sky/weather.........Mostly cloudy (60-80 percent). Slight chance of
                    thunderstorms early in the evening. Chance of
                    rain showers in the evening and overnight, then
                    slight chance of rain showers overnight.
Min temperature.....56-59.
Max humidity........70-80 percent.
Wind (20 ft)........Northwest winds 5 to 11 mph. Gusty and erratic
                    winds expected near thunderstorms early in the
                    evening.
Mixing height.......500 ft AGL.
Transport winds.....Northwest 9 to 16 mph.
Ventilation Index...Poor (160) decreasing to poor (40) overnight.

.FRIDAY...

Sky/weather.........Partly sunny (50-70 percent). Chance of rain
                    showers in the morning, then slight chance of
                    showers and thunderstorms in the afternoon.
Max temperature.....70-73.
Min humidity........52-57 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph. Gusty and erratic
                    winds expected near thunderstorms late in the
                    afternoon.
Mixing height.......4100 ft AGL early in the morning.
Transport winds.....Northwest 6 to 10 mph.
Ventilation Index...Poor (50) increasing to poor (170) in the
                    afternoon.

$$
Forecaster...NWS Seattle
Requested by...Dolores Moore
Type of request...WILDFIRE
.TAG 2518894.1/PDT
.DELDT 07/31/25
.FormatterVersion 2.0.0
.EMAIL dolores_moore@yakama.com