Here are some links for Tucson weather information:
The Tucson area observations are something I am always looking for, and are tucked away in a hard to find
place on the NOAA site. If the above link stops working, you may be able to find this data by Using the
general info link, clicking on Tucson, then below "Current Conditions" click on "More Local Wx".
Low pressure areas in the northern hemisphere (sometimes called "cyclones)
have winds that rotate counterclockwise around them and are usually cloudy weather.
High pressure areas in the northern hemisphere (sometimes called "anticyclones)
have winds that rotate clockwise around them and are usually clear weather.
The base of the stratosphere (top of the troposphere) is about 19,000 feet. ???
It is rare that clouds reach above the top of the troposphere, but sometimes
big thunderheads (cumulonimbus) do.
Drop me a line!
Tom's Weather Resources / firstname.lastname@example.org