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The warnings were in place Saturday night and they came to fruition on Sunday, one of the stormiest days of the current series of storms passing through the Bay Area.
Creeks throughout San Mateo County and Palo Alto overflowed their banks, causing problems in homes and on the roads.
Information on San Francisquito Creek can be found here.
For other up-to-date alerts, click here.
The wind and rain contributed to accidents, power outages and felled trees.
A car stalled in floodwaters on Redondo Beach Road in Half Moon Bay Sunday afternoon. A rescue was performed in conjunction with State Parks Lifeguards and an inflatable boat from the San Mateo County Harbor Patrol. No injuries were reported but a man, his girlfriend and two Newfoundlands were removed from the vehicle and escorted to safety where they were checked by Fire District paramedics, according to Clayton Jolley, Battalion Chief, San Mateo County Fire Department, Coastside Fire District.
At least 25 flights were cancelled at San Francisco International Airport and others were delayed more than two hours.
Delays at SFO were expected to accumulate and worsen into the night. Passengers are encouraged to check the status of their flights before leaving for SFO.
To locate the status of flights, check here.
In addition to flooding caused by overflowing creeks, several inches of water were reported in north and southbound lanes on U.S. Highway 101 near Cesar Chavez Street.
In Santa Cruz County, all southbound lanes on CA-17 at Sugarloaf Road are blocked by a rockslide. Motorists are advised to expect delays and to avoid the area.
An accident was blocking the left lane of the westbound CA-92 connector ramp to southbound I-280 in San Mateo. A severe traffic alert is in effect. Motorists are advised to expect delays and to avoid that area too.
For up-to-date traffic alerts, click here.
Accidents have also been reported southbound 280 at Bunker Hill Road near San Mateo, southbound 280 at Foothill Expressway, northbound on 101 near Woodside Road, northbound 101 near 380, northbound on 280 near Sand Hill, 101 southbound near Hillsdale, 101 southbound near Marsh and northbound 101 near Sierra in Brisbane.
Trees have been reported downed on Crescent Ave. in San Mateo, Woodside Road in Woodside, near the intersection of Oak Knoll and Summit in East Menlo Park and Bear Gulch Road near Skyline Blvd.
Wires were downed near Milagra Drive and Oceana Blvd. and on Johnson Ave. in Pacifica.