* WHAT...Flooding caused by excessive rainfall is possible.
* WHERE...A portion of south central Arizona, including the following areas, Aguila Valley, Buckeye/Avondale, Cave Creek/New River, Central Phoenix, Deer Valley, East Valley, Fountain Hills/East Mesa, Mazatzal Mountains, New River Mesa, North Phoenix/Glendale, Northwest Valley, Rio Verde/Salt River, Scottsdale/Paradise Valley, South Mountain/Ahwatukee, Southeast Valley/Queen Creek, Tonopah Desert and Tonto Basin.
* WHEN...From Sunday evening through late Sunday night.
* IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS... - Ample moisture and atmospheric instability will again combine with a weather system positioned over western portions of the region to promote scattered thunderstorms capable of producing heavy rainfall from Sunday evening into Sunday night. Training of storms could result in localized rainfall amounts of over two inches within the watch area. - http://www.weather.gov/safety/flood