Overview

• Southern California saw bands of heavy rain Tuesday with 0.50–0.75 inch per hour rates and localized 2–3 inches on Pacific-facing slopes of the San Gabriel and San Bernardino Mountains, sustaining a flash-flood risk over burn scars and urban terrain.
• WPC flagged flash flooding as likely overnight into Tuesday morning in central and southern California where 0.5–1 inch per hour rates developed on upslope terrain as the strongest onshore flow shifted toward the Transverse Ranges.
• SPC reported a low-topped convective band over coastal Southern California, including a measured severe gust and wind damage in Ventura and Los Angeles counties, with only a brief weak tornado or waterspout considered possible.
• Across the Southwest, scattered thunderstorms continued from Arizona into New Mexico and southwest Colorado with locally high rates and isolated flash flooding, including overnight development moving north through central New Mexico.
• In the Carolinas, the coastal low weakened after earlier producing 1.5–2.5 inch per hour rates and 3–6 inch totals in parts of northeast South Carolina and southern North Carolina, where flooding impacts had already occurred.