Atmospheric River Headed to San Diego County and What It Means for the Water Year

A quick-moving atmospheric river, capable of bringing heavy downpours and mountain snow, is expected to drench San Diego County by late Thursday, and it could offer some early clues about the water year.

California’s water year runs from Oct. 1 through Sept. 30. January and February are typically the wettest months. So far this season, a Pacific storm in mid-October brought more than an inch of rain in the mountains and about four-fifths of an inch along the coast.