A Shorter Heat Wave; But 2nd Hot Spell Likely

June 25, 2015

The hot weather arrived today, a day earlier than I expected.  I forecast 88 but instead PDX hit 92!  This was the 5th day this June with a high temp 90+…we’re only one day away from a June record too.  We’ve never seen more than 6 days 90+ here in Portland.

MarkJune_90DegreeDays

If you want to cool off, head to the coastline.  No hot weather there.  At least partly cloudy and maybe even cloudy skies with a shower Sunday:

MarkCoast_WeekendFcst_PlusWaveTemp

There is some good news though.  After a scorcher Saturday models are showing more mid-high cloud cover Sunday.  Plus at the surface a decent onshore push of cooler marine air cools things off too.  As a result, the heat wave has been shortened to just today through Saturday.  Temps Sunday-Tuesday will likely only be in the mid-upper 80s.

The big ridge of high pressure rebounds a bit the 2nd half of next week as we head towards the 4th of July Weekend.  I think we’ll see high temps back into the 90s Wednesday/Thursday, and possibly into Friday & the 4th.  That’s how we could end up with a 2nd heatwave.

Chief Meteorologist Mark Nelsen