Another 500 mb short wave will be crossing Arizona late Tuesday and Wednesday of next week. The 120-hour, 500 mb forecasts from the operational versions of the ECMWF (above) and the GFS (below) are shown - valid 5 pm MST on Tuesday afternoon. The forecasts are very similar, with the ECMWF taking a bit larger vorticity maximum across central and southern Arizona, while the GFS keeps this maxima across central Arizona. At this time, assuming the forecasts verify well, it appears like another windy Pacific front across the area, but with both models keeping the system starved for moisture.
The GFS keeps much of the Southwest, most of California, and western Mexico completely precipitation free for the next ten days - see below - forecast of total precipitation for that period. Ugh.
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