Helix, Oregon Weather Forecast Discussion

400
FXUS66 KPDT 131750
AFDPDT
Area Forecast Discussion
National Weather Service Pendleton OR
1050 AM PDT Sat Sep 13 2025
.AVIATION...18Z TAFs...Mostly clear skies this morning will
become SCT-BKN (mid- and high-level cloud) by this evening as a
weather system approaches from the Pacific. BKN-OVC skies are then
forecast overnight through Sunday morning, and all sites have a
30-50% chance of rain showers along and ahead of a cold frontal
passage. Thunder chances are low (15% or less), but cannot rule
out isolated embedded thunderstorms within the broader region of
showers.
The overnight timing of the cold frontal passage reduces
confidence in TAF details to medium (40-60%) due to uncertainty in
winds, and of course exact timing/location of showers.
Additionally, sub-VFR conditions may occur in showers and/or
thunderstorms, but confidence was too low (

NWS PDT Office Area Forecast Discussion