Bend, Oregon 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

394
FXUS66 KPDT 050520
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
1020 PM PDT Wed Jun 4 2025

.UPDATED AVIATION...06Z TAFs...VFR conditions will persist
through the forecast period. CIGs will remain mostly SKC with a
few sites seeing SCR-FEW 25 kft. Winds will be mostly diurnally
driven and variable below 6 kts with DLS remaining near 10 kts
through 20Z. Bennese/90


&&

.PREV DISCUSSION... /issued 421 PM PDT Wed Jun 4 2025/

SHORT TERM...
Tonight through Saturday...Dry north to northwesterly flow will
continue through Friday. Then an upper level ridge will begin to
build over the region on Saturday. Temperatures will warm through
the period. Highs will start about 5 degrees above normal on
Thursday and mainly be in the 80s, and end about 15 to 20 degrees
above normal on Saturday and be in the 90s. By Friday into
Saturday, HeatRisk will reach the moderate category. On Friday
the moderate will mainly be confined to the Columbia Basin,
Yakima Valley and surrounding areas. On Saturday, the Moderate
HeatRisk will overspread much of the lower elevations of the
region.

Diurnal breezes in the 15 to 20 mph range are expected each day.

LONG TERM...
Saturday night through Wednesday...The ridge will move over the
Pacific Northwest Sunday and Monday and this will build the heat.
There is some uncertainty as to how quickly the ridge breaks
down, but by midweek, temperatures do look to be back into the 80s
to lower 90s.

However, in the meantime, an early season heat wave will occur and
we are looking at the potential of 5 to 6 days of 90s in many
lower elevations and mid 90s in many areas with the Columbia Basin
topping out in the triple digits (40-60%) confidence at this
point). Sunday and Monday also will have major HeatRisk across the
Columbia Basin, Yakima Valley and portions of the Blue Mountain
Foothills and moderate HeatRisk over all but the highest
elevations. 80 to 90% of the ECMWF ensemble members have 100+
temperatures for Tri-Cities for Sunday and Monday and about 40% of
the members linger the triple digits into Tuesday.

The ECMWF EFI is showing 0.8 to 0.9 anomalies for high and low
temperatures both Sunday and Monday for a broad area of
Northeastern Oregon and Southeastern Washington.


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  51  84  56  90 /   0   0   0   0
ALW  55  84  59  88 /   0   0   0   0
PSC  51  89  55  94 /   0   0   0   0
YKM  53  87  58  93 /   0   0   0   0
HRI  51  88  55  94 /   0   0   0   0
ELN  52  86  57  89 /   0   0   0   0
RDM  41  81  46  88 /   0   0   0   0
LGD  48  79  51  84 /   0   0   0   0
GCD  46  81  50  86 /   0   0   0   0
DLS  53  88  60  91 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...None.
WA...None.
&&

$$

SHORT TERM...77
LONG TERM....77
AVIATION...90