A sluggish storm following an uncertain path is expected to reach San Diego County Tuesday and drop 0.6 to 1.3 inches of rain from the coast to the inland valleys, and possibly 1 inch of snow on mountain peaks, the National Weather Service said.
The system was originally expected to move ashore on Monday. But the storm has slowed a bit and isn’t likely to deliver significant rain before dawn Tuesday. It appears that the heaviest rain will fall in North County.
Forecasters say the system will draw extra moisture from the subtropics, but not as deeply as the storms that have drenched the county since late January. It’s possible that thunderstorms will break out, intensifying rainfall before the system clears to the east on Wednesday.
A flash flood watch will be in effect for the entire county from 10 p.m. Monday to 10 a.m. Wednesday.
San Diego’s daytime highs will reach 63 on Monday and Tuesday and 64 on Wednesday. The seasonal high is 66. The city’s average monthly temperature, so far, is 56.2 degrees, which is 2.6 degrees below average.
A high surf advisory will be in effect through 10 p.m. Tuesday. Waves are expected to reach 6 to 9 feet at west-facing beaches, with occasional sets to 10 to 12 feet.
