Brownstown, Washington Weather Forecast Discussion

052
FXUS66 KPDT 250542
AFDPDT
Area Forecast Discussion
National Weather Service Pendleton OR
1042 PM PDT Wed Sep 24 2025
.Updated for Aviation...
.AVIATION...
06Z TAFS...VFR conditions are generally expected through the
period. Smoke from nearby wildfires could reduce VSBYS at YKM and
PSC. Some reduced VSBYS have already been briefly reported across
the Columbia Basin. Therefore have opted to included some MVFR
VSBYS at PSC, though confidence is average at best. Winds will
increase during the late morning into the afternoon on Thursday
and gust 20 to 25 kts everywhere and 25 to 30 kts at DLS.
Confidence is high (90%) in these winds especially during the late
afternoon hours.
&&
.PREV DISCUSSION... /issued 654 PM PDT Wed Sep 24 2025/
UPDATE...Opted to issue a Wind Advisory for the Kittitas Valley,
valid 11 AM Thursday to 2 AM Friday. Strong cross-Cascade pressure
gradients coupled with modestly strong winds aloft (25-35 kts)
and strong isentropic descent should facilitate a windy day
through the valley. Forecast soundings from CAMs show a low-level
jet (LLJ) as strong as 50 kts by late afternoon and evening
through the valley and east to Ryegrass Summit along I-90.
Confidence in strong winds of 20-35 mph with gusts of 40-55 mph is
highest (60-90%) between 1 PM and 11 PM Thursday. Plunkett/86
PREV DISCUSSION... /issued 501 PM PDT Wed Sep 24 2025/
AVIATION...00Z TAFs...VFR conditions are forecast for all sites
through the period; however, confidence in VSBYs at KYKM/KPSC is
lower than average given the presence of active wildfires along
the east slopes of the Washington Cascades. Sub-VFR VSBYs
overnight and Thursday morning may occur, but confidence was too
low (

NWS PDT Office Area Forecast Discussion