Friday, December 17, 2010

Rain Event With Snow On Highest Mountains

It was a reasonable rain event yesterday afternoon and evening here in metro Tucson. Most rain occurred after 5 pm here at house, with a nice period of light to moderate rain from around 6 to 7 pm. Event total at house was 0.25", with most most metro gauges catching 0.10 to 0.15", although Atmo had .21", but the airport only 0.08". Amounts, as indicated by yesterday's WRF runs dropped off rapidly to the south. Highest amounts in southeast Arizona were in and around the Catalinas, with 10 ALERT gauges having more than half an inch and 2 having more than an inch, again similar to WRF forecasts. Couldn't find any early reports on how much snow fell up on Mt. Lemmon.
Across the eastern Pima County ALERT newtwork 90 of 93 gauges had measurable rainfall, with 3 of the most southerly sites missing out on the event.
This morning's 06Z run of the WRF-GFS model at Atmo keeps precipitation over next several days to the north and forecasts a very significant and extended event in the mountains of far north Ariz0na.
Top photo shows the U of A Computer Sciences webcam view north toward the Catalinas at 5 pm yesterday. Bottom photo taken just a bit ago looking east down our street. The extremely unusual phenomenum seen is heavy ground fog, with visibility here about 1/8 to 1/4 of a mile. I assume the ghost circles are due to my cheap camera and the flash.

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