Isolated-Scattered thunderstorms are expected at first over prominent terrain features of Southwest AZ and Southeast CA late morning/early afternoon, spreading into the surrounding lower deserts later in the afternoon, then scattered to numerous storms may develop along an outflow boundary that pushes towards the Phoenix Metro Area from a cluster of storms expected to form over southeast AZ. Hi-Res guidance shows the potential for any given storm to quickly drop 1-2" of rain, and if multiple storms move over the same spot, totals could be locally higher.