Cold Spring Night

March 20, 2007

SnapshotA quick drop in dewpoints this afternoon along with temperatures holding steady heralded the arrival of a much cooler airmass into the Northwest.  A nice little line of showers brought hail to them Portland metro area in the early afternoon too.  I noticed the temp even at the top of our transmission tower (1800′) didn’t dip much below 40 degrees, so any snow mixed in was short-lived.  But a cool and breezy day in general.
Very weak ridging develops over us the next 3 days, cutting off most of the rainfall.  But we’ll be right on the edge, with wet days in Seattle and guaranteed dry in Eugene.  Great…tough forecasting coming up again.  Spring IS the toughest forecast season west of the Cascades in my opinion.
One trend I see in the 00z GFS and 00z GEM is cold troughing for next week.  Just in time for Oregon’s spring break it appears that we’ll see a cold & showery weather pattern…Mark