Rain changed over to big, fluffy snowflakes here about 10 minutes ago.
Above is this morning's 500 mb analysis from NCAR RAP. The short wave of interest has moved only slightly eastward, but opened and sharpened with coldest temperatures (~ -35 C) now a bit east of San Diego. However, the GEFS average 500 mb forecast (below) valid at 5:00 pm MST this afternoon, is indicating that digging system up in Northwest will kick the Arizona short wave eastward across the state today.
Rain reports from ALERT for event through 6:00 am this morning (north above and south below). Heaviest rain amounts at that time had fallen over the southern portion of network with heavy snow probably over high elevations. Through 6:00 am the airport had 0.42"; DM 0.38"; and Atmo about 0.48". Rain here light to moderate, so I have not had chance to check gauge - my estimate at this time is that we've had a bit over half an inch.
Rains at low elevations over metro area began after 5:00 pm, around dusk. Rain finally wet payment here at house about 6:30 pm.
I'm sure most everyone is aware of the tremendous amounts of snow that have fallen over northern third of state. This morning I-17 remains closed, as well as Highway 87 north of Payson - traffic maps seem to indicate that I-40 may have reopened.
Current model forecasts indicate main local rain event to end early afternoon over metro, with perhaps lingering showers of rain/snow as trough/coldest air aloft move overhead.
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