The 500 mb anticyclone is centered near Grand Junction. A McCollum Type II pattern is decaying today - it is of interest that my surface analyses indicate that the most significant series of storms yesterday evening probably occurred along the weakening frontal zone. The cold front associated with this wave is moving rapidly southward across Montana this morning. Falling heights and pressures over the Basin continue to lead me to hope for a nice Gulf surge either tomorrow morning or the next. P chart of the 12 UTC sounding from Luke Air Force Base on July 22, 1994.
Wind speeds are in knots.
The small box indicates the location of Phoenix, and the Salt and Verde River Basins are outlined. However, once again no outflows strong enough to lift the desert boundary layer to its LFC developed. Dust and an evening outflow moved across the Valley around 8 to 9 pm. The storm to the south-southwest had substantial lightning at dark.