Hermiston, Oregon 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

538
FXUS66 KPDT 262313
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
413 PM PDT Sat Jul 26 2025

.UPDATED AVIATION...00Z TAFs...VFR conditions will persist
through the forecast period. CIGs will be mostly SKC with some
FEW/SCT250 moving across through the afternoon. Winds will be
below 12 kts across many of the sites increasing this afternoon
and settling a bit overnight Beginning after 01Z, PDT/BDN/RDM will
see winds increase 10-13 kts and gusts to near 20 kts. DLS will
remain elevated at near 12-15 kts and gusts to near 24 kts through
the afternoon. Bennese/90


&&

.PREV DISCUSSION... /issued 157 PM PDT Sat Jul 26 2025/

DISCUSSION...Satellite displays clear to fair skies for the
region. Winds are generally breezy. with the strongest winds
located near the Mountain Gaps near the Gorge. Winds will top at
25-30mph before they decrease to light and variable in the
overnight hours. Strongest winds will be today, with a weakening
trend as we go through the rest of the weekend into early next
week. A ridge over the central southern parts of the CONUS will
drift westward through the coming days, allowing for temperatures
to start a warm trend going through mid next week. NBM models
currently show highs entering the triple digits (50-70% chance)
Tuesday and Wednesday, with Wednesday looking to be the hotter
day. Although areas that will experience triple digits doesn`t
appear to be widespread at this moment, many areas across the
region are likely (80-90% chance) to experience mid to high 90s; a
10-15 degree above the normal for this time of year.

Pattern will remain quiet and dry until the closed off low
situated in Alaska moves further offshore. This southward move in
the low will shift our winds aloft in a more SW/SSW flow, allowing
for moisture to enter the region and adds fuel for thunderstorm
chances going into next week. This SW/SSW flow will linger through
mid next week, allowing for thunderstorm chances (15-25%) to
spread more areal coverage going through Thursday. The first round
of thunderstorms in the area will be tomorrow across the Eastern
Mountains and parts of the Southern Blues into the early afternoon
hours (15-25% chance). Coverage spreads into Central Oregon
heading into the late afternoon/early evening hours of Sunday.
Thunderstorms Monday and Tuesday will reflect a similar situation,
but more focused on Central OR and Southern Blues

Our biggest concerns for widespread thunderstorms through the
region (including the Basin and Kittitas Valley) is Wednesday and
Thursday as deeper moisture builds into the region from the low
system moving eastward. This will draw some fire concerns as
lightning could be potent in a strong developing thunderstorm.
Given that, we will keep monitoring for any necessary fire
highlights going into next week as storms become more widespread
through the week.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  59  90  61  93 /   0   0  10  10
ALW  63  90  66  93 /   0   0  10   0
PSC  58  93  60  96 /   0   0   0   0
YKM  57  90  59  94 /   0   0   0   0
HRI  60  92  62  96 /   0   0  10   0
ELN  56  87  59  93 /   0   0   0   0
RDM  47  87  50  89 /   0  10  20  20
LGD  56  87  57  91 /  10  20  20  20
GCD  55  89  57  90 /  10  30  20  20
DLS  60  88  62  93 /   0   0   0   0

&&

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

$$

SHORT TERM...95
LONG TERM....95
AVIATION...90