025
FNUS76 KPDT 081331
FWSPDT

Spot Forecast for Sunrise Fire...BLN
National Weather Service Pendleton OR
631 AM PDT Tue Jul 8 2025

Forecast is based on forecast start time of 2100 PDT on July 08.
***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 2 PM THIS AFTERNOON TO 11 PM
PDT THIS EVENING FOR ABUNDANT LIGHTNING...

.DISCUSSION...A pair of upper level weather systems will produce
a slight chance (15-20%) of thunderstorms capable of producing
abundant lightning, gusty outflow winds, and small hail in the
afternoon and early evening today and Wednesday. Temperatures will
cool tomorrow, with afternoon RHs in the low 20s, but will be in the
mid to upper 20s Thursday. Overnight recovery will be excellent.
Winds will generally be from the northwest during the day, with
breezy winds developing along the ridgetops in the afternoons.

.WEDNESDAY...

Sky/weather.........Sunny (0-10 percent). Slight chance of showers
                    and thunderstorms late in the afternoon.
CWR.................0 percent.
Chance of lightning.15 percent.
Max temperature.....84-87.
Min humidity........16-21 percent.
Wind (20 ft)........Drainage winds becoming northwest 6 to 13 mph
                    after 11AM. Gusty and erratic winds
                    expected near thunderstorms late in the
                    afternoon.
Ridgetop wind.......Northwest winds 5 to 10 mph increasing to
10 to 17 mph after 2PM.
Mixing height.......8700 ft AGL.
Transport winds.....West 6 to 15 mph increasing to around 20 mph
                    late in the afternoon.
Ventilation Index...Poor (70) increasing to excellent (720) in the
                    afternoon.

.WEDNESDAY NIGHT...

Sky/weather.........Mostly clear (5-15 percent). Slight chance of
                    showers and thunderstorms early in the evening.
CWR.................0 percent.
Chance of lightning.15 percent.
Min temperature.....50-53.
Max humidity........77-82 percent.
Wind (20 ft)........Northwest winds 6 to 13 mph becoming 4 to 7 mph
after 1AM. Gusty and erratic winds expected
near thunderstorms early in the evening.
Ridgetop wind.......Northwest winds 10 to 17 mph shifting to the
west 5 to 10 mph after 11PM.
Mixing height.......1000 ft AGL.
Transport winds.....Northwest 13 to 22 mph shifting to the west
                    around 8 mph early in the morning.
Ventilation Index...Excellent (1040) decreasing to poor (160)
                    overnight.

.THURSDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....79-82.
Min humidity........21-26 percent.
Wind (20 ft)........Northwest winds around 5 mph becoming 6 to
11 mph after 12PM.
Ridgetop wind.......Northwest winds 5 to 10 mph shifting to the
north 7 to 13 mph after 3PM.
Mixing height.......7400 ft AGL.
Transport winds.....Northwest 8 to 12 mph.
Ventilation Index...Poor (140) increasing to good (520) in the
                    afternoon.

$$
Forecaster...Lawhorn
Requested by...Matthew Noss
Type of request...WILDFIRE
.TAG 2517521.0/PDT
.DELDT 07/08/25
.FormatterVersion 2.0.0
.EMAIL mnoss@blm.gov,tfenske@blm.gov