Arizona Weather Force has issued a Severe Thunderstorm Watch for Southeast and Southern Arizona, including the Tucson area and a Weather Advisory for the Phoenix Valley effective this evening into the night …Read on for details ….
Thunderstorms are have formed on the Rim and the general flow is out of the north and east. It’s not too fast, but the down-sloping from the stronger storms could bring outflow boundaries down into the Phoenix and Tucson areas this evening. That is the focus …
If I had to call it now, it would be a 20% coverage of storms in the Phoenix Valley areas, meaning 80% of you won’t have it … and a 90% coverage for the Tucson areas, meaning most of you in Tucson will get the storms this evening …
So more in Tucson by far than in Phoenix. Outflow will come directly down I-17 into the PHX area and pop isolated storms there while numerous cells are expected to form and hit the Tucson area. Storms will have a marginal severe wind risk and due to strong upper divergence on the SE side of the high pressure system, storms may very well go into the night …