Shown above are the regional radar plots (from NCAR) for 8 am, 10 am, noon, and 2 pm MST. The radar charts show the quick movement of the primary band of showers across Pima County. At 2 pm the sun was back out here at the house, but not before the temperature had dropped into the upper 30s. Most stations in the ALERT network received light rainfall (or snowfall) of 1 to 2 tenths of an inch. Gauge here has exactly a tenth of an inch in it. With the sun back out, the question is now whether we'll get some instability showers as the very cold middle-level air comes over (San Diego was -29C at 500 mb this morning).
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