Friday, November 30, 2018

Summary - Early Morning Event


Early am view of Summerhaven on Mt. Lemmon - looks like a couple of inches of wet snow up there.


Most of sites in the Pima County ALERT network had 0.04" (above north portion and below south portion), or more, during the early morning hours - amounts at low elevations heaviest (1/3 to 1/2 inch) on west side of Catalinas out west toward Marana. Generally QPF amounts were well forecast by GEFS plumes (previous post). The Airport had thunder and 07" during 15 minutes before 04:00 am MST (timing very well forecast by all models), while DM had thunder and 0.10". Here at house there is 0.17" in the gauge - don't know if there was thunder here (lightning and radar seem to indicate yes).



Radar (base scan) from NCAR RAP at 3:32 am this early morning. Models were extremely accurate for this event, from Tuesday night on - very impressive performance. Below is CG flash density (from wetaher.graphics and Vaisala) for 24-hours ending at 05:00 am, showing most CG flashes occurred over metro area and Catalinas.


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