Rain appears to be on schedule for an arrival by 1pm or so in the farthest western metro locations, and then it’ll spread to the east from that point through 2-3pm eastside.
Here are the latest temps:
You can see who is out of the “danger zone” for freezing rain. Temperatures are above freezing pretty much everywhere north of the Columbia River (Clark county) and east of the Willamette River (Multnomah and Clackamas counties). And dewpoints are rising with the temps, so when rain starts the temperature won’t fall, or at least won’t fall more than a degree or two. So most of us in the metro area will not see freezing rain this afternoon.
Lots of 29 degree temps across the south metro, but as I mentioned before, at midday/afternoon the pavement needs a temp 30 degrees or below to freeze up the liquid rain that’ll be falling onto it. So I think those areas are also “in the clear”. And the inversion is breaking up, thus the freezing fog/low clouds have lifted in these areas. That helps to slightly warm the ground.
Which leaves one area in the western valleys that could start as freezing rain around 1pm or so. As I mentioned in previous postings, the spots up against the east slopes of the Coast Range that are coldest and get the rain first: Forest Grove, Banks, Gaston, and Hillsboro. Western Washington county could start icy, then warm to freezing within an hour. Or there may be patches of ice where the pavement has been shaded more the past few days, but not in spots that had sunshine. Be careful out there if it happens!
Of all the places to warm up, Eugene has finally gone above freezing. At noon it’s 33 down there, after a low in the mid teens!
Chief Meteorologist Mark Nelsen