No Record Today; Much Warmer Thursday

April 6, 2016

10pm Wednesday…

Temperatures maxed out “only” in the mid 70s in the metro area today.  We jumped 13 degrees from yesterday.  But we did not break a record and I was 6 degrees short…BUST

PLOT_Highs_Metro

We had two things going against us today (Mark’s list of excuses ahead…).  First, some thin high clouds a good chunk of the day; you can subtract a couple degrees for that.  Then we barely broke the inversion by late afternoon.  A very chilly start with temps in the 30s was hard to overcome.  The potential was there for an 80 degree day if the air was more thoroughly mixed.  Many locations in the foothills of the Cascades were as warm or warmer than us.  Detroit Lake was 79 at 1,600′ for example.    We had a light northerly flow and definitely no easterly offshore flow (that part was expected).

MarkWarm_PortlandRecords

We did break 2 new April records with the Salem sounding this evening:

  1. 500mb height was 585 dm, the highest 500mb height we have seen on any April day except possibly the 30th (or maybe May 1st, can’t quite see on the chart).
  2. 850mb temp = 18.2 degC, the highest we have ever seen in the first 3 weeks of April!

So yes, the potential is there for record-breaking warm temperatures.  The last piece missing is the offshore flow, and that has begun this evening as models have forecast.  Crown Point is gusting to around 40 mph.  The Troutdale profiler shows the warming late this afternoon and continuing into the evening (latest is left side of chart).  Note the wind is northeast now all the way down to the surface as opposed to the northwest wind all day long:

Capture

During the daylight hours tomorrow we’ll have easterly wind blowing all through the metro area.  Hopefully not TOO much to keep the high temperatures down at PDX though.  Hate to see another high temp forecast bust!

This should maximize our heating potential so I would expect a 10-12 degree rise in highs in the metro area Thursday.  That means mid 80s are still on tap.

Chief Meteorologist Mark Nelsen