Big Arizona MCC Report

Deborah in Ahwatukee reports:

It's raining now.

This shows the high water mark on our walkways from the faux arroyo put in to regulate run-off. Would've been cool to see if not for all the lightning.

I reply:

The thunderstorms that started on the Rim yesterday morphed into one ginormous Mesoscale Convective Complex (MCC): basically one big mass of many thunderstorms. The MCC proceeded south, through eastern AZ, carefully circled around Ahwatukee so as not to disturb your sleep (you caught only the feathery edge of it), and now it's heading SW, crossing the border around Organ Pipe Cactus National Park, and heading towards Mama - the remnants of Tropical Storm Emilia, which has broken up west of Baja California (Punta Eugenia).

There's no reason why this kind of stuff can't keep happening for the next few days. There's some sign the thunderstorm switch will be turned off by Tuesday of next week, at least for awhile. But as long as there's these big discontinuities of humidity, and Emilia keeps pumping humidity north, it'll keep raining!