NEXT RAIN CHANCE SAN DIEGO: UPDATED MONDAY 3-20-2017

A large storm system is spinning off the West Coast. It looks impressive on the satellite loop below. This system will glide overhead on Wednesday. Scattered showers and isolated downpours will be possible during this time. We could even see an isolated thunderstorm Wednesday night, so don't be surprised if you hear a rumble or two. The computer forecast rain totals are below.

Snow levels will stay above 8,000 feet all day Wednesday, then drop as low as 5,000 feet by Thursday morning as the system exits. The highest mountains in San Diego County could get some snow, though most of the accumulations will be in the San Bernardino Mountains and into the Sierras. The computer forecast snow totals are below.

Another system could pass the area on Saturday, however, it doesn't look too impressive.