Slow Weather, but Warm Night

March 6, 2007

Snapshot_33A very nice 2nd taste of Spring today.  Highs between 65 and 70 degrees were common across the northwest part of Oregon and southwest part of Washington.  The 65 at the Portland Airport occurred despite a continuing easterly wind.  As you see to the left, 2 years ago a regime of easterly flow brought us temperatures in the low-mid 70’s this time of year.  I clearly remember the steady easterly wind for several days.  This is the time of hte year where an easterly wind changes to a warmer wind instead of producing cooler temps.  The warm upper-level ridge is slipping off to the east this evening, allowing a weak front to move onshore.  Models are very slow bringing rain inland tonight;  most likely it won’t arrive until closer to daybreak.  I also notice a trend in the 3-4 day forecast is for no huge amounts of rainfall, just lots of onshore flow bringing cloud cover and light rain at times.
Off/on rainy weather will continue for at least the next 7 days.  Some models are hinting at ridging returning the middle of next week, but thats a long way off!  Mark