Amid the relentless rain brought by an atmospheric river soaking Northern California, a flash flood warning was issued Friday afternoon for San Francisco and parts of San Mateo County where instances of flooding deemed "life-threatening" were occurring.

Nov. 22, 5 p.m. A flash flood alert in San Francisco has been downgraded to a flood warning as the intense downpour from a California atmospheric river slows down in the city but continues to pummel other parts of the Bay Area. San Francisco’s flood warning is in effect until 6:45 p.m., the National Weather Service said in a social media post.

A third day of an atmospheric river storm has inundated Northern California and the Bay Area, flooding creeks, roads, and low-lying areas across the region.

An atmospheric river continued to drench the Bay Area on Friday, triggering flash flood warnings due to the intense rainfall. Follow along for live updates.

Here's how much rain and snow fell along the Interstate 5 corridor so far this week, and what else the winter storm will do. Rounding out the work week is another day of moderate, dry and mostly sunny conditions on Friday.

A third day of an atmospheric river storm has inundated Northern California and the Bay Area, prompting warnings and advisories about local flooding.