The 500 mb anticyclone is now centered over the southwest corner of New Mexico. However, conditions over Arizona have become much drier at 500 mb. There is a weak mid-level shortwave trough moving across the state today. Flow at all levels is westerly and there is little prospect of convective activity in central Arizona. P chart of the 12 UTC sounding from Luke Air Force Base on July 12, 1994.
Wind speeds are in knots.
The small box indicates the location of Phoenix, and the Salt and Verde River Basins are outlined. There were almost no clouds over the state again today. There was isolated convection and a shower or two in the far northeast corner of Arizona.