Cold snap chills early risers, but the coming rain is more worrisome

A cold front moved through San Diego County before dawn Monday, dropping temperatures into the 30s across some inland areas and into the 40s and 50s at and near the coast, says the National Weather Service.

San Diego International Airport fell to 50 before dawn, Montgomery Field dropped to 45, Oceanside and Imperial Beach dropped to 48, Julian hit 37.

“The temperatures were actually about average, but this is one of the first cold mornings we’ve had this fall,” said Mark Moede, a weather service forecaster.

Monday’s daytime highs will reach the mid-60s and low 70s along the coast temperatures will dip sharply Tuesday, and warm further Thursday.

But then a major storm out of the north-central Pacific will bring heavy rain to San Diego County, particularly on Wednesday and Thursday. The rain could cause flash flooding across the region.

Forecasters say the system could drop up to 1.5’’ to 2’’ of precipitation, especially in southern coastal areas, according to the latest computer modeling. Similar figures are projected for inland areas.

Moede said the rain is likely to begin on Wednesday afternoon and evening, affecting the late rush hour. The rain will last well into Thursday. He said strong winds out of the south-southeast also will hit the coast, with the strongest gusts hitting 25 mph on Wednesday night.

“This will be a good sized winter storm that we’ll have to watch closely,” Moede said.

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