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The Dalles, OR

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IMMEDIATE FORECAST
Today

Today: Sunny
Sunny
Hi 95 °F
Sunny, with a high near 95. Northwest wind 3 to 12 mph, with gusts as high as 20 mph.
Tonight

Tonight: Mostly Clear
Mostly Clear
Lo 61 °F
Mostly clear. Low around 61, with temperatures rising to around 63 overnight. Southwest wind 5 to 12 mph, with gusts as high as 20 mph.

THREE-DAY OUTLOOK
Saturday

Saturday: Sunny
Sunny
Hi 98 °F
Saturday
Night
Saturday Night: Clear
Clear
Lo 62 °F
Sunday

Sunday: Sunny
Sunny
Hi 96 °F
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Lo 60 °F
Monday

Monday: Sunny
Sunny
Hi 92 °F
Monday
Night
Monday Night: Clear
Clear
Lo 59 °F

FORECAST DISCUSSION
Friday through Sunday...The heat is back on as
warm summer conditions promote another round of
heat related products while fire weather season
also persists with a fire weather watch for dry
thunder still in effect, and some lingering
concerns for breezy winds over the weekend and
into next week.  High pressure ridging will
continue to meander a bit further eastwards
today and center itself over the Four Corners
region while a Pacific trough off of California
will rise slightly northwards, keeping the
overall flow southwesterly to westerly and
generally stagnant overall. This will allow our
temperatures to remain on the warm side and
limit overnight recoveries of cooler lows. With
the NBM showing a 40-90% chance of highs greater
than or equal to 100 on Saturday for our
population centers and lower but still
noteworthy chances of 20-60% on Sunday while
lows only get down into the 60`s, HeatRisk
values will bounce back into the moderate to
major category for the weekend. This is enough
of a signal that a heat advisory was issued to
account for the hot temperatures - though not
quite as warm as the stretch we just went
through, concerns will still be present for heat
related illness.  Onto the fire weather side of
the forecast, the westerly flow will help to
promote periods of breezier conditions through
the Cascade Gaps. Kittitas Valley remains a
problem spot for sustained winds expected to hit
15-20+ mph, but the duration remains in question
and if it will line up with minimum afternoon RH
values long enough. If a red flag warning were
to be necessary, Sunday is the most likely day
when the NBM shows an 80-90% chance of wind
speeds 25+ mph in this area, along with the
Columbia Gorge into portions of the lower
Columbia Basin. Confidence is still low at this
time though precluding the need for a fire
weather watch. On the subject of a fire weather
watch - the watch for the southern
Blue/Strawberry Mountains remains in effect for
Saturday into Sunday, but confidence has lowered
here also. Models show the weak shortwave that
is moving in and the vorticity associated with
it has dropped just a bit further south, pulling
a bit more of our isolated thunder chances back
down. Still some models show the chance at a few
cells and cannot rule it out enough to fully
cancel the watch at this time. Will need to
monitor the afternoon model runs to see if any
new changes occur to our probabilities to change
confidence. Goatley/87   .LONG TERM...Monday
through Friday...Models continue to be in good
agreement through the long term forecast
periods. The Four Corners high will remain in
place but an upper level trough over the eastern
Pacific will keep enough westerly flow over the
region to prevent monsoon moisture from
impacting the forecast area. High temperatures
will continue to run around 10 degrees above
normal. About the only real concern will be the
locally breezy conditions that develop each
afternoon and evening along the east slopes of
the Cascades and the threat that poses to fire
spread. Otherwise, pretty much a typical summer
weather pattern in store for next week.  

NWS PDT Office Area Forecast Discussion