Twin Rocks, Oregon Weather Forecast Discussion

635
FXUS66 KPQR 102221
AFDPQR
Area Forecast Discussion
National Weather Service Portland OR
321 PM PDT Wed Sep 10 2025
.SYNOPSIS...Conditions trend drier the next several days as
lingering shower and thunderstorm chances (primarily over the
Oregon Cascades) begin to dwindle. Expect a brief warm-up for
the first half of the weekend. While the forecast becomes more
uncertain Sunday onward, especially by the middle of next week,
cooler and wetter weather Sunday into Monday is favored with a
50-70% chance for rainfall.
&&
.DISCUSSION...Now through Tuesday night...An upper-level low
continues to churn over northern California and far southern
Oregon this afternoon remaining the primary driver of impacts
for the next day or two. Current satellite and radar
observations depict showers and thunderstorms developing over
the Oregon and Washington Cascades as of 1400-1500 today thanks
to some diurnal heating along the crests and the influence of
that aforementioned upper-level low just to our south. Model
soundings show a fairly deep but "thin" CAPE profile
(~500-1000j/kg) in addition to ENE steering flow so while the
chance for any strong severe thunderstorms are very low (

NWS PQR Office Area Forecast Discussion