It appears that moisture will remain high for next several days and thus thunderstorm activity is likely to remain with us. Key question is whether the likelihood for severe storms will develop during the next several days. Part of answer lies in the behavior of the strange cutoff low - if it continues to drift westward cloudiness will decrease and temps tomorrow may get over a hundred. The models pull the cutoff north-northeastward in response to height falls to the north associated with the amplifying shortwave now on shore in the Pacific northwest. P chart of the 12 UTC sounding from Luke Air Force Base on July 18, 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 numerous storms in the state, although coverage in the Valley was not as high as expected. There were very heavy rains and many storms between the Valley and the Rim, with over 4 inches of rainfall near Sun Flower. The storms formed early and moved generally northward.