Excessive Rainfall Discussion NWS Weather Prediction Center College Park MD 415 AM EDT Fri Mar 29 2024 Day 2 Valid 12Z Sat Mar 30 2024 - 12Z Sun Mar 31 2024 ...THERE IS A SLIGHT RISK FOR EXCESSIVE RAINFALL ACROSS PORTIONS OF SOUTHERN CALIFORNIA... ...Southern California to southern Nevada and western Arizona... A heavy to excessive rainfall threat developing Friday into early Saturday will spread further south as an unseasonably deep low drops south from the central to the southern California coasts. Strong onshore flow and moisture advection along the associated frontal band, will spread precipitation across southern California, with upslope flow accentuating the threat for heavy to excessive accumulations along the coast, where a Slight Risk was maintained along the Transverse and Peninsular ranges below the snow line. Residual moisture spreading further inland is expected to fuel a lesser threat for excessive rainfall into the lower Colorado Basin, including southern Nevada and western Arizona. Pereira