Active AlertsDragoon/Mule/Huachuca and Santa Rita Mountains including Bisbee/Canelo Hills/Madera Canyon

What: Flash flooding caused by excessive rainfall is possible.
Where: Tucson Metro Area, Southeast Pinal County, Tohono O'odham Nation, Upper San Pedro River Valley Upper Santa Cruz River Valley/Altar Valley, Baboquivari Mountains, Catalina and Rincon Mountains, Dragoon and Mule and Huachuca and Santa Rita Mountains.
When: From Saturday morning through late Sunday night.
Impacts: Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Low-water crossings may be flooded. Flooding may occur in poor drainage and urban areas.
Additional Details: - An increase in moisture will bring scattered thunderstorms Saturday and Sunday. Rainfall rates in excess of 1 inch per hour are expected with the stronger storms with isolated areas having the potential of 1-3 inches. Additional rainfall from the previous day and overnight activity will result in faster responses in normally dry washes, creeks and roadway dips. - Http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.