A slow-moving upper level low pressure system, aided by a Pacific cold front and moisture from the remnants of Tropical Cyclone Polo, will bring widespread showers and storms mid to late week. 3-day totals of 2 to 5 inches are expected, focused mainly Wednesday night through Thursday night. Isolated higher totals are possible, which could lead to flooding in some areas. Some severe weather may also occur as storms first arrive late Wednesday.