For the first time in five weeks, a Pacific storm could bring widespread rain to San Diego County starting late Tuesday night. But most areas will get less than 0.25 inches by Wednesday evening as the system brushes Southern California, the National Weather Service says.
The storm will move from the northwest to the southeast, weakening as it passes through the region. Camp Pendleton could get 0.3 to 0.4 inches of precipitation, enough to slow traffic along Interstate 5 early Wednesday.
The system will help usher in cooler daytime highs and thicken the marine layer, restoring a sense of winter. San Diego’s daytime high is forecast to be 67 on Tuesday, 65 on Wednesday and Thursday, and 66 on Friday. The seasonal high is 66. The temperature has been higher than that since the start of February.
Forecasters say a broader, deeper mass of cool, wet air might reach San Diego County next week.