Rain expected, snow possible as 2 storm systems meet

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SAN DIEGO — The first rainstorms of the season are expected to move into the region Tuesday, bringing significant rainfall throughout San Diego County along with the possibility of snow in the mountains.

A low-pressure system to the south will make its way north and meet a colder, low-pressure system that is making its way down the coast, National Weather Service meteorologist Miguel Miller said.

These conditions are expected to produce rain starting Tuesday evening and continuing through Thursday night, with the heaviest rainfall expected on Wednesday, Miller said.

The NWS issued a flash flood warning that will be in effect from Tuesday evening through late Wednesday night in the county mountains, valleys and coastal areas.

Rainfall amounts through Thursday night are expected to be around 2 inches in the mountains, between 1 and 1.5 inches in the inland valleys, around 1 inch near the coast and less than a quarter-inch in the deserts, according to the NWS.

Snow levels will drop to 6,000 feet by Wednesday evening, with several inches of snow expected by late Thursday, Miller said.

Temperatures are expected to remain about 5-10 degrees above average Tuesday before dropping to 15-20 degrees below average on Wednesday, he said.

High temperatures Tuesday are expected to reach 76 degrees near the coast and inland, 81 in the western valleys, 74 in the mountains and 81 in the deserts.

Another storm system could bring precipitation on Friday, but those showers are expected to light and isolated, Miller said.

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