Wednesday, July 27, 2016

Quick Look At Last Night's Event

Storms moved into the eastern part of the metro area late in the afternoon yesterday - above is composite radar chart for 5:45 pm MST. Strong storms moved through with gusty winds around 8;30 to 10:00 pm. Here at house we had 0.23" during the night and another 0.16" from a small shower around 7:30 am. Plot below shows detected CGs for 24-hours ending at 2:00 am this morning, with a definite increase in storm activity over Pima County.

The ALERT network rainfall data indicate only 4 sites with rainfall from 5:00 am to 5:00 pm yesterday, but then from 5:00 pm through 5:00 am this morning 75% of the sites recorded 0.04" or more. Heaviest amounts were in the Redington Pass area. Sites with no precipitation were in the western portions of the network.

The TWC sounding is pretty chopped up this morning and anticipating what it will look like late afternoon is a challenge. The 500 anticyclone has shifted into the center of the Great Basin, so steering flow will be generally north to northeast. This is a pretty good situation for southern Arizona, as long as the low-level moisture and CAPE persist.

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