Lecture 1-Nats 101
27
Local Weather and Climate: 
The North American Monsoon
¥Tucson gets half of its rainfall during the summer
¥Sonora, Mexico gets most of its rainfall during the summer
¥During summer, high pressure sets up to the east/northeast of Arizona which brings moisture in from the south and east
¥The monsoon is still going:  Thunderstorms yesterday
¥For a monsoon overview and daily forecast, see:
¥http://www.wrh.noaa.gov/twc/monsoon/monsoon.php
¥http://www.atmo.arizona.edu/products/models/forecasts/forecast.html
¥CONCERN: Our monsoon & rainfall may be changing