Thanks. More questions, not necessarily only aimed at weatherwiz: In my (limited) understanding, EML air-masses originate from the SW USA and find their way here along a ridge with westerly winds usually? And they're characterized by dry midlevels and steep midlevel lapse rates? If this is true, and transport is usually due to a midsummer 594-ish mb ridge, I'm wondering why these events aren't that common. It seems like we get ridges like that a couple times every summer, and we see frontal passages maybe every 4 days.