An area of storms dissipating (note the translucent anvil cloud in center of the image above) over east-central Pima County has produced a nearly circular region of clear, subsiding outflow that covers almost the eastern half of the county. The dewpoint at Tucson has fallen to 48F at 2100 UTC. Will be interesting to see how this pronounced mesoscale feature plays out wrt convection during the rest of the day. (Note for perspective - Pima County covers approximately 30,000 square km.)
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