A Historic June In Pacific Northwest

June 30, 2015

There’s a good chance you won’t see a June like this in many years!  We broke record after record…




  1. June was a full degree warmer than an AVERAGE July or August!
  2. Warmest night on record in June…71 degrees
  3. Not the driest, but 25 consecutive dry days is a new record
  4. Most sunny days, plus least # of cloudy days in June

Not on the chart, it’s the driest April-June we’ve ever seen here.  No, you’re not crazy, the ground is the driest you have ever seen it this time of year:


Of course we didn’t get the extreme heat at the end of the month like Eastern Oregon has seen.  It could have been worse!  Take a look at Hermiston:


We’re not done with the hot stuff yet.  The past two days my forecast has busted…yes it appears I have a “cold-bias” in my forecasting.  For whatever reason (possibly the warmer than normal offshore water?) surface temperatures have been consistently warmer than one would expect with significant onshore flow (yesterday & today) and 850mb temps in the +16 to +19 range.

The onshore flow goes just about flat tomorrow, then back to weak onshore Thursday before strengthening Friday.  As a result we should see temperatures JUMP a few degrees tomorrow.  94-97 should be common high temp numbers on the 1st of July.

When will the hot weather end?  The GFS says early next week high temps should drop quite a bit and it shows weak troughing nearby.  Yet the ECMWF keeps a narrow hot ridge centered between an upper-level low off California and a trough to our north.  Hmmm, they are once again at odds with each other.  Their respective ensembles seem to mainly support the operational runs as well.  So…I’m not sure if next week is the end of the hot weather or not.

Chief Meteorologist Mark Nelsen