108 FXUS66 KPDT 041155 AFDPDTArea Forecast Discussion National Weather Service Pendleton OR 455 AM PDT Sat Oct 4 2025
.AVIATION...
Westerly surface winds will create upslope stratus along the crests of the Cascades this morning, as light west to northwest winds prevail across the area to the east of the range. GOES Nighttime microphysics RGB is showing patchy stratus east and south of BDN and RDM into central Oregon. HRRR dewpoint surface depression trends stay dry with double digit spreads through the early morning hours, whereas BDN and RDM might have a better shot at some stratus development with smaller spreads (2-3 degrees) by 13-16z. Considerable HREF probability of ceilings less than 2,000 and 1,000 feet are fairly well removed from the terminal vicinities, mostly over the higher terrain Saturday morning, so any stratus near the BDN and RDM terminals will lean VFR to MVFR. Expect winds light and variable even into the afternoon, but for DLS where 24-28 knot gusts will be common in the afternoon. /OTX
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.PREV DISCUSSION... /issued 1143 PM PDT Fri Oct 3 2025/
UPDATE...Partial clearing of upslope stratus across central and eastern Oregon should facilitate some chilly overnight lows for climatologically cold-prone locations of central Oregon and the high valleys of the Blue Mountains. Given the current dew points in the mid-30s to lower 40s and incoming clouds from the north, confidence is too low (
NWS PDT Office Area Forecast Discussion