Another run last night of the ECMWF and its ensembles out to 32 days. It shows a few cool troughs for the next 2 weeks (cool & wet at times), then higher than normal heights (milder & drier) the 3rd & 4th week.
The Autumnal Equinox was this evening, so we’re now halfway to winter “sunwise”. The highest sun angle in the sky (and most energy received) is the third week of June in the northern hemisphere. The lowest sun angle in the sky (and least energy) is the third week of December.
Typically meteorologists consider June-August as “meteorological summer” in the northern hemisphere, and as you saw in a posting 3 weeks ago, it was our 2nd warmest on record here in Portland (at the airport).
I just calculated the summer values if you start on June 21st and go through September 21st. It was the warmest summer on record in Portland if you go by those dates. It totally blew the previous record away at 71.24 degrees.
The previous record was 70.1 degrees set five years ago in 2009. In fact the top 5 warmest summers (using these dates) were all within less than a degree of each other. This time, the new number is more than a degree higher than the previous record! Wow…
Part of the reason is a 2nd record we just broke the all-time record for 60+ nights too.
By the way here’s a nice graphic explaining a few things…from a NWS office. I found it on Facebook
Chief Meteorologist Mark Nelsen