The National Weather Service is issuing a flash flood warning in across northeastern Tucson until 6:45 p.m. Friday.
The rain started late Friday afternoon, with thunderstorms popping across northern Tucson, Oro Valley and Catalina. Spotters with the NWS reported golf-ball sized hail Friday at around 4 p.m.
Severe thunderstorm warnings were issued for northern Tucson initially, but as storms scattered across the Catalina Foothills and further south, the NWS issued a flash flood warning covering most of the east and central parts of Tucson.
The strong storms petered out quickly Friday evening, but more moisture is coming behind the storms, forming over the eastern mountains and heading southwest towards the Tucson area.
A flood advisory remains in effect for most of the central Tucson area, along with Oro Valley and Catalina to the north.
This is a developing story. Visit the KGUN9 Weather Center for the latest updates.