Thus the surface and 850 mb patterns appear favorable for a resurgence of low-level moisture. The 500 mb pattern continues to be dominated by falling heights and the strong shortwaves off west coast and over the central Plains. The subtropical high is pushed south into northern Mexico - note that Guaymas does remain in the easterlies on the south side of the upper anticyclone. The high at 500 mb is still progged to gradually redevelop north and westward - this will leave the state in general westerly flow into midweek. P chart of the 12 UTC sounding from Luke Air Force Base on August 21, 1994.
Wind speeds are in knots.
The small box indicates the location of Phoenix, and the Salt and Verde River Basins are outlined. Observed Weather Only scattered storms occurred today over the east mountains but very heavy storms occurred over the SE quarter of the state. Rest of state was quite suppressed. The storms to the southeast built northward to as close as the Gila Bend and Casa Grand areas but could not build on into the central Valley because of lack of instability. The storms did produce a dusty outflow that moved through the Valley just before dark from the south.