Continuing periods of light showers with more extensive coverage during the nights across eastern Pima County. It has been a continuing cloudy and dreary period, with quite light rain amounts over most of the metro area. The TUS sounding (above) from 5 pm MST yesterday (Sunday, September 8th) indicates that there was at best a very shallow boundary layer. The lowest levels had decent CAPE but would have required lifting to about 700 mb to realize it. Up at 750 mb or so there was no parcel CAPE available, thus we've had stable, light showers, while areas that had more sunshine and heating have experienced deep convection and some thundershowers. Southerly winds were quite pronounced from 500 to above 300 mb, but winds below 500 mb continued very anemic.
At 5 am MST this morning (radar from TUS above) there was a large area of weak, low-topped showers covering Santa Cruz and much of Pima and Pinal Counties. here at the house we had only 0.03" in the gauge at dark last evening and showers during the night had added an additional 0.05" during the night - so not much of a two day event. At 5 pm yesterday only 25 ALERT stations had recorded rain during the past 6-hours. But rainfall was more widespread during the night and 73 sites (almost 80%) report rain during past 24-hours.Amounts were generally light and only 13 stations had 1/4" or more and 4 sites had over 1/2". Best rain amounts and coverage were across southern parts of the network - below is 5 am sector plot for the southern-most part of the network showing rainfall at every site and 3 of the sites with over 1/2"..
The plot of CGs through 5 am this morning (above) shows large portions of Santa Cruz, Pima, Pinal, and Maricopa Counties with little or no lightning during the past day. there were some active storms during the early morning hours (the pink to red colors) in southern California. Another dreary morning with heavy cloud cover and continued light sprinkles - as per north view from Kitt Peak, below at a bit after 6 am.
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