Storms in the mountains will pose the continuing threat of heavy rainfall. This morning's analyses show a weak shortwave in the subtropical easterly flow over at least southwestern Arizona today, although it is not clear how it is affecting the overall situation. There is strong threat of severe storms to the southeast and portions of Zone 8 may be affected. The outlook is for an increased chance of Valley storms and also at least a slight chance of severe due to an expected resurgence in low-level moisture. P chart of the 12 UTC sounding from Luke Air Force Base on August 7, 1994.
Wind speeds are in knots.
The small box indicates the location of Phoenix, and the Salt and Verde River Basins are outlined. The Rim had widespread, and fairly early storm activity - e.g., large storm west of Flagstaff before noon. Unfortunately we missed getting them to fly an 0300 UTC sounding.