Back-to-back storms are expected to bring San Diego County rain clouds, gray skies and precipitation for much of the week. Round one of this week unsettled weather delivered a healthy dose of rain. Rain totals for Tuesday are approaching an inch in some places,

A second, larger system will arrive Wednesday night and last well into Thursday, delivering 0.25 inches or more inches of precipitation at the coast and an inch in the eastern half of the county. Palomar Mountain and Mount Laguna are likely to have snow by dawn Thursday.

The rain will continue off and on through Saturday in most parts of the county with a brief respite Wednesday, the San Diego office of the National Weather Service said.

Schools in the Spencer Valley School District closed at noon Thursday due to inclement weather and hazardous road conditions.

County is in for a wet week, as rain showers roll in Tuesday and linger through Saturday, peaking with a downpour Thursday morning.

Rain-starved San Diego County will get hit by a cold and blustery late winter storm Wednesday night that could drop half an inch of rain at the coast and more than twice that in the mountains by the time it clears off to the east on Friday, the National Weather Service says.

"This system is expected to be quite cold aloft which increases the chances of thunderstorms across the area, leading to an increased threat of flooding."