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Tsunami  Warning Reduced to Advisory - March 11, 2011


Updated 4:30 PM - Friday, March 11, 2011

Redwood City, Calif.: The San Mateo County Sheriff’s Office of Emergency Services as of 4pm today has returned to normal operating protocol.

The Center had been operating in emergency mode after this morning’s issuance of a Tsunami Warning by the National Oceanic and Atmospheric Administration (NOAA).

The decision to return to normal operations was based on NOAA’s reducing of the hazard notification from “Warning Level” to “Advisory Level” (Advisory is the lowest level alert issued by NOAA).

Fortunately, the County of San Mateo encountered no reported damage, injuries or loss of life.

Residents have been advised that it is now safe to return to their homes. One shelter remains open at this time, but residents will be returning to their own homes within the next few hours.

All highways and surface streets are open. Beach areas and coastal waterways remain subject to unexpected and dangerous waves.

The Office of Emergency Services remains at duty officer status able to return to full activation immediately.


Updated 1:30 PM - Friday, March 11

The San Mateo County Sheriff's Office in cooperation with the City of Pacifica and the Town of Half Moon Bay wish to provide an update to the public of the current Tsunami situation along the San Mateo County Coast.  
The Tsunami generated by the earthquake in Japan arrived along the coast at about 8:00 this morning.  It caused a change in the tidal surge along the California coast.  Tsunamis arrive as a series of surges.  Later waves, many hours after the initial arrival, have the potential to do damage.   
At this time a "TSUNAMI WARNING" issued by the National Oceanic and Atmospheric Administration remains in effect for the California Coast. 

The County Human Services Agency in cooperation with the American Red Cross are operating four shelters for people who have left the potential inundation area.  The shelters are located at:

  • Terra Nova High School (1450 Terra Nova Blvd.)
  • Oceana High School (401 Paloma Avenue)
  • Farrallone View Elementary (1100 Le Conte)
  • Half Moon Bay High School (1 Louis Foster Drive)

The shelter at Pescadero High School is now closed.         
Please do not go to the coast side if you can at all avoid it.  If you are on the coast side, stay away from beaches and low lying areas near the ocean.  Your cooperation will assist in relief and response efforts.    

Further updates will be provided as more information becomes available.


Update 8:30 AM - Friday, March 11

Pacifica, Half Moon Bay, El Granada, Pescadero and other coast side communities have been notified. A voluntary evacuation remains in effect.

Should the situation worsen, sirens will sound.

In an abundance of caution, the American Red Cross with the San Mateo County Human Services Agency, opened five shelters located at:

  • Terra Nova High School (1450 Terra Nova Blvd.)
  • Oceana High School (401 Paloma Avenue)
  • Farrallone View Elementary (1100 Le Conte)
  • Half Moon Bay High School (1 Louis Foster Drive)
  • Pescadero High School ( 350 Butano)

The tsunami poses no threat to bay side communities. Those in low lying areas near the ocean are advised to move inland. Law enforcement personnel are on the roadways providing direction. Stay tuned to local radio stations or television for additional information.

The 2-1-1 phone line is available to provide concerned residents with assistance.

We will post updates throughout the day.


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