There will be series of light rain storms starting tonight and persisting off and on through Sunday. There is also a high surf advisory in effect through Sunday afternoon.

The Tsunami Warning for the SF Bay Area has been called off.

⚠️ The National Weather Service has issued a Flash Flood Warning on Nov 22 for San Mateo County.

The National Weather Service in San Francisco has issued a

• Flash Flood Warning for…
  Northwestern San Mateo County in northern California…
• Until 500 PM PST.
• At 200 PM PST, local law enforcement reported flash flooding in NW
  San Mateo. Between 0.5 and 1 inch of rain has fallen. Additional
  rainfall amounts of 1 to 3 inches are possible in the warned area.
  Flash flooding is already occurring.

HAZARD…Flash flooding caused by heavy rain.

SOURCE…Law enforcement reported.

IMPACT…Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.

• Some locations that will experience flash flooding include…
  Daly City, South San Francisco, San Bruno, Pacifica, Brisbane,
  Colma and Broadmoor.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Turn around, don’t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

The Atmospheric River / Bomb Cyclone storm affecting the entire Pacific Northwest and the SF Bay Area will continue to have impacts through Sunday.

A very potent storm is arriving tonight (Tuesday) and will bring heavy rain, especially in the North Bay. A “bomb cyclone” is expected to deepen quickly off the PNW coast. A flood watch is in effect for the North Bay from 4am Wed through 5am Fri. A wind advisory is in effect from 10pm Tues through 6am Thurs for San Francisco and San Francisco Bay Shoreline, The Marin Hills, Western Sonoma County Hills, and Coastal North Bay Including Point Reyes National Seashore. The forecast map below from the NWS Ocean Prediction Center (OPS) for 4pm PST Tues Nov 19 shows the low pressure system offshore. The current Bay Area forecast calls for high rainfall amounts north of the Golden Gate Bridge, and high winds throughout most of the Bay Area. There is some uncertainty as to how much rain will fall south of the Golden Gate over the next few days. Stay tuned for updates.