Flash flood watch issued as 2nd storm approaches

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SAN DIEGO – The National Weather Service issued a flash flood watch Tuesday morning as the second storm system of the week headed toward San Diego.

The first of several storms lined up to pass over the San Diego area this week delivered modest showers Monday in advance of wetter and colder unsettled systems expected in its wake. A more powerful system was expected to bring heavier showers beginning Tuesday morning and continuing through Wednesday, FOX 5 weathercaster Chrissy Russo said.

Between 10 a.m. and 4 p.m., the storm could drop 0.75 inches of rain along the coast and up to 3 inches of rain in mountain areas, Russo said. The runoff from the mountain rain could lead to dangerous flash floods, mud slides and debris flows in coastal and valley areas, she said.

By Friday, the spate of blustery winter conditions likely will leave behind two to four inches of rain west of the mountains, three to six inches on coastal slopes, 0.5 to 1.5 inches in the deserts and snow as low as the 4,000- foot level, according to the National Weather Service.

The surf is expected to build to 5 to 8 feet Tuesday through Wednesday, and to 8 to 12 feet with sets to 15 feet Thursday, the NWS reported. Potentially damaging ocean waves, coastal flooding, strong rip currents and beach erosion will be possible from Wednesday night through Friday morning, according to the federal agency.

Temperatures five to 10 degrees below average are also in the forecast this week.

Over the 24-hour period ending at 4 p.m. Monday, the bands of dark clouds dropped 0.42 of an inch of precipitation on Otay Mountain; 0.41 on Mount Laguna; 0.28 in Campo; 0.24 in San Ysidro; 0.23 on Dulzura Summit; 0.19 in Point Loma; 0.14 in Alpine and Flinn Springs; 0.13 in Chula Vista; 0.12 at Lindbergh Field; 0.1 in El Cajon; 0.09 in Mission Valley; 0.08 in La Mesa, Ramona, San Diego Country Estates and Santee; 0.07 in Del Mar, Linda Vista and
Solana Beach; 0.04 in Encinitas; 0.03 in Valley Center; and 0.02 in Carlsbad, San Marcos and Vista.

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