Friday: Back to Back 100 Degree Days

July 31, 2015

7pm Friday…

Another scorcher today, we hit 101 in Portland today.

PLOT_Highs_Metro

That’s the first time we’ve had two consecutive 100 degree days since July 2009.

MarkHot_HeatWave_HottestSoFar

Everyone in the metro area was just a few notches cooler, and we’ll be another 4-5 degrees cooler on Saturday.  So this heat wave will just gradually wane.  By Sunday high temps should be down to around 90 degrees.  Hard to believe a high of 90 will be 13 degrees COOLER than the high Thursday!

All models are in very good agreement that a marine push arrives Sunday night for a continuing cooldown.  An upper-level trough lingering nearby late in the week means high temps likely stay in the 70s…a bit below normal.

By the way, as of today we’ve seen 21 days at/above 90 degrees this summer.  Pretty amazing to have that occur by July 31st.  In a typical (average) summer we average 5-6 the rest of the season, so it looks quite likely we’ll break the all-time record of 24 days set back in 2009.  It would be a very strange turn of events if we DON’T see any more 90+ highs after Sunday.

July was also the 2nd warmest in Portland’s history…1985 just barely beat us.  The two cool periods in the middle of the month kept the average high temperature a little lower than you might have thought.

Chief Meteorologist Mark Nelsen