View of Catalinas at 11:00 am MST this morning, showing high clouds and slightly dirty air.
Current NWS graphic from NWS for the weekend. The color scheme doesn't seem to quite match the legend on the right.
Plumes for QPF at the airport from the 06 UTC GEFS runs, indicating significant rains late tomorrow through Sunday. The plumes for temperature (below) indicate a dramatic cool-down Sunday and Monday.
POPs for the airport (below) are very high for tomorrow and Sunday.
The NBM 12 UTC run above shows total precipitation through 12 UTC on Monday, with much of Arizona forecast to have heavy amounts. Current am forecast for the airport through the weekend is shown below, with a flood watch late Saturday and Sunday.