Public Information Statement
Issued by NWS Eureka, CA

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NOUS46 KEKA 231724
PNSEKA
CAZ001>004-076-240330-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
1024 AM PDT THU OCT 23 2014

...PUBLIC INFORMATION STATEMENT...

THIS IS DAY FOUR OF CALIFORNIA FLOOD PREPAREDNESS WEEK.

BE AWARE...BE PREPARED AND TAKE ACTION.

COASTAL FLOODING CAN BE CAUSED BY...ONE...THE ALIGNMENT OF THE
GRAVITATIONAL PULL OF THE MOON AND SUN THAT RESULTS IN EXTREMELY
HIGH TIDES...TWO...STORMS THAT PRODUCE STRONG ONSHORE WINDS AND
LOW PRESSURE THAT CAUSES THE WATER TO PILE UP AT THE COAST...KNOWN
AS STORM SURGE...OR...THREE...LARGE OCEAN WAVES THAT TEMPORARILY
SHOVE WATER EVEN FARTHER UP THE COAST...KNOWN AS WAVE SETUP. WHEN
TWO OR MORE OF THESE WAVES OCCUR AT THE SAME TIME..THEN THE
COASTAL FLOODING CAN BE SEVERE AND RESULT IN OVERTOPPING OF
NATURAL AND MAN-MADE FLOOD PROTECTION STRUCTURES LIKE SEA WALLS.
DAMAGE TO COASTAL STRUCTURES AND COASTAL EROSION CAN BE
PARTICULARLY BAD WHEN COASTAL FLOODING INCLUDES LARGE WAVES
BECAUSE THEIR POWERFUL FORCE IS DELIVERED FARTHER INLAND BY THE
ELEVATED WATER LEVEL. LOW LYING COASTAL COMMUNITIES ARE HIGHLY
SUSCEPTIBLE TO COASTAL FLOODING AND ASSOCIATED DAMAGING WAVES.

KNOW YOUR RISK OF COASTAL FLOODING AND TAKE ACTION TO REDUCE YOUR
RISK.

TSUNAMIS...EARTHQUAKES CAN ALSO CAUSE COASTAL FLOODING BY
TRIGGERING A TSUNAMI. ALTHOUGH MANY PEOPLE THINK OF A TSUNAMI AS A
SINGLE...BREAKING WAVE...IT TYPICALLY CONSISTS OF MULTIPLE EAVES
THAT RUSH ASHORE LIKE A FAST RISING TIDE WITH POWERFUL CURRENTS.
TSUNAMIS CAN TRAVEL MUCH FARTHER INLAND THAN NORMAL WAVES. SOME
TSUNAMIS COME FORM ACROSS THE OCEAN...FOR EXAMPLE...THE MARCH 2011
EARTHQUAKE IN JAPAN BROUGHT AN EIGHT FOOT WAVE INTO CRESCENT CITY
HARBOR...DESTROYING MUCH OF THE HARBOR. SOME OF THE EARTHQUAKES
THAT TRIGGER TSUNAMIS HAPPEN CLOSE TO OUR COASTLINE. WHEN THIS
HAPPENS...THE RESULTING TSUNAMI CAN REACH COASTAL COMMUNITIES
WITHIN MINUTES.

IF YOU FEEL AN EARTHQUAKE THAT LASTS A LONG TIME...LEAVE COASTAL
AREAS AND GO TO HIGH GROUND.

BE AWARE OF YOUR SURROUNDINGS. KNOW HOW TO REACH HIGH GROUND
QUICKLY.

LOOK FOR EVACUATION ROUTES AND SIGNS. KNOW YOUR EVACUATION
ROUTES. IF EVACUATING...PLAN FOR WHERE TO MEET YOUR FAMILY OR
FRIENDS AND WHO TO CONTACT.
IMPACTS OF COASTAL FLOODING AND TSUNAMIS...THE IMPACT FROM COASTAL
FLOODING OR TSUNAMIS CAN BE DEVASTATING. MORE THAN 600 THOUSAND CALIFORNIANS
LIVE WITHIN A QUARTER OF A MILE OF THE COAST. IN ADDITION TO THE
SIGNIFICANT NUMBER OF PEOPLE AT RISK OF COASTAL FLOODING AND
TSUNAMIS...COASTAL URBAN CENTERS PROVIDE CONSIDERABLE SUPPORT FOR
CALIFORNIA`S ECONOMY.

LIVES...HOMES..BUSINESSES AND INFRASTRUCTURES LIKE
ROADS...RAILWAYS..AND INDUSTRIAL AREAS ARE ALL AT RISK OF COASTAL
FLOODING AND TSUNAMIS...WITH SIGNIFICANT POTENTIAL FOR SOCIAL AND
ECONOMIC LOSES. IN 2006...A TSUNAMI CAUSED APPROXIMATELY TWENTY
MILLION DOLLARS IN DAMAGE TO CRESCENT CITY HARBOR. THE REPAIRS
WERE NOT YET COMPLETED WHEN THE MARCH 2011 TSUNAMI CAUSED
APPROXIMATELY TWELVE AND A HALF MILLION DOLLARS IN ADDITIONAL
DAMAGES TO THE HARBOR.

&&

RELATED WEBSITES FOR MORE INFORMATION:

CALIFORNIA DWR FLOOD PREPAREDNESS WEBSITE
HTTP://WWW.WATER.CA.GOV/FLOODSAFE/CA-FLOODPREPAREDNESS/FPW_HOME.CFM

CALIFORNIA DWR FLOOD MANAGEMENT WEBSITE
HTTP://WWW.WATER.CA.GOV/FLOODMGMT/

FEMA TSUNAMIS INFORMATION WEBSITE
HTTP://WWW.READY.GOV/TSUNAMIS

CALIFORNIA OES MY HAZARDS WEBSITE
HTTP://MYHAZARDS.CALEMA.CA.GOV/

FEMA FLOOD INSURANCE PROGRAM
WWW.FEMA.GOV/NATIONAL-FLOOD-INSURANCE-PROGRAM

NWS ADVANCED HYDROLOGIC PREDICTION SYSTEM
HTTP://WATER.WEATHER.GOV/AHPS

NWS CALIFORNIA NEVADA RIVER FORECAST CENTER
HTTP://WWW.WRH.NOAA.GOV/CNRFC

$$



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