Looks like easterly gradient is picking up quickly this evening as high pressure settles east of the mountains. Still looks like maybe 8 millibars from PDX-DLS by mid-morning tomorrow. Obviously fog is close to developing with a low temp-dewpoint spread at this hour. This fog should be quite shallow with easterly wind developing just above the surface just about everywhere in the metro area by daybreak. I think the increasing wind will also keep us fog-free east of I-205 tonight.
This won't be one of those wintertime events where the wind sticks around for days and days. A front passing by to the north Thursday lowers pressures to the east pretty quickly then, killing the wind.
Long range? There seems to be a tendency in several different models to want to bring troughing over the Pacific Northwest, a pattern similar to last winter. 00z GFS looks quite a bit different though. It IS a safe bet that mild and warm weather continues at least through next Tuesday. Beyond that though you should just roll the dice. Mark Nelsen