This should cool things a bit in the middle levels and still keep the threat of severe thunderstorms in Zone 8, even through the thunderstorms this morning have partially worked over the airmass. Tomorrow the Type II pattern weakens as the models move the 500 mb high further to the west. This may put us in a northerly flow pattern, but couldn't find much to hang my hat on in the model runs. As the high builds westward, and if moisture is still in place, then the shortwave coming around the high could give us some problems tomorrow. P chart of the 12 UTC sounding from Luke Air Force Base on August 14, 1994.
Wind speeds are in knots.
The small box indicates the location of Phoenix, and the Salt and Verde River Basins are outlined. These appeared to be associated with a shortwave in the westerlies. Storms formed late in the day along the eastern Rim and down toward Tucson. A weak outflow did move through the Valley, but no severe weather occurred. The storms were very strong along the Rim and in early afternoon, when storms began to form to the North and Northwest.