* WHAT...Flooding caused by excessive rainfall is possible.
* WHERE...A portion of Southeast Arizona, including the following areas, Baboquivari Mountains, Catalina and Rincon Mountains, Dragoon and Mule and Huachuca and Santa Rita Mountains, Tohono O'odham Nation, Tucson Metro Area, Upper San Pedro River Valley and Upper Santa Cruz River Valley/Altar Valley.
* WHEN...From 4 PM this afternoon through 11 PM MST this evening.
* IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS... - Expect scattered thunderstorms beginning late this afternoon through the evening. One inch per hour rainfall rates will be likely across the watch area with three hour rainfall totals approaching 3 inches in isolated areas. - http://www.weather.gov/safety/flood