Biggs Junction, Oregon Weather Forecast Discussion

438
FXUS66 KPDT 282238
AFDPDT
Area Forecast Discussion
National Weather Service Pendleton OR
338 PM PDT Sun Sep 28 2025
.DISCUSSION...Today through Tuesday: Current satellite and radar
imagery show mostly clear skies across the forecast area with few
clouds lingering. Warm and dry conditions prevail today, but with
light to breezy winds over the Cascade Gaps and eastern mountains
from the low-level upslope flow through this evening. Monday onward,
the frontal system will move across the PacNW with widespread
showers. The raw ensembles favor a 60-80% probability for amounts up
to 0.15 inch over the WA/OR Cascades and 30-50% prob of rain amounts
of 0.25 inch for the eastern mountains Monday. Tuesday seems to have
the raw ensembles slightly lower with a 40-60% prob for 0.25 inch.
Otherwise, the lower elevations will have 0.10 inch or less. This
system will assist in bringing isolated thunderstorms upward across
portions of the East Slope of OR Cascades and eastern mountains for
Monday and then the Wallowas Tuesday (

NWS PDT Office Area Forecast Discussion