Coastal flood advisory

A Coastal Flood Advisory is issued by the National Weather Service of the United States when coastal flooding along the coast of the Atlantic Ocean, Pacific Ocean, or the Gulf of Mexico is occurring or imminent, but does not pose a serious threat to lives or property, but rather will simply pose a nuisance to people in the affected area. The flooding must be due to water being forced from the nearby body of water onto land, and not from rainfall. Nor'easters, hurricanes, tropical storms, and thunderstorms can all lead to the issuance of a Coastal Flood Advisory.[1]

Contents

Example

The following is an example of a Coastal Flood Advisory issued by the National Weather Service office in Taunton, Massachusetts.[2]

753 
WHUS41 KBOX 012026
CFWBOX

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
326 PM EST FRI JAN 1 2010

...WIDESPREAD MINOR COASTAL FLOODING LIKELY SATURDAY...

MAZ007-015-016-019-022-024-020430-
/O.NEW.KBOX.CF.Y.0001.100102T1600Z-100102T1900Z/
EASTERN ESSEX MA-SUFFOLK MA-EASTERN NORFOLK MA-
EASTERN PLYMOUTH MA-BARNSTABLE MA-NANTUCKET MA-
326 PM EST FRI JAN 1 2010

...COASTAL FLOOD ADVISORY IN EFFECT FROM 11 AM TO 2 PM EST
SATURDAY...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A COASTAL
FLOOD ADVISORY FOR THE EASTERN MASSACHUSETTS COASTLINE...WHICH IS IN
EFFECT FROM 11 AM TO 2 PM EST SATURDAY.

THE ADVISORY INCLUDES THE CITIES AND TOWNS OF SALISBURY...NEWBURYPORT...
ALL OF CAPE ANN...COASTLINE OF BOSTON...HULL...COHASSET AND SCITUATE.

LOW PRESSURE WILL RAPIDLY INTENSIFY INTO A POWERFUL STORM SATURDAY
WELL EAST OF CAPE COD. DESPITE ITS DISTANCE OFFSHORE NORTH TO
NORTHEAST WINDS WILL INCREASE TO 20 TO 30 MPH LATE TONIGHT AND
CONTINUE INTO SATURDAY. THESE WINDS WILL YIELD A STORM SURGE OF 1.5
FT TO PERHAPS AS MUCH AS 2.0 FT. THESE SURGE VALUES WILL COMBINE WITH
VERY HIGH ASTRONOMICAL TIDES TO PRODUCE STORM TIDES AT OR ABOVE FLOOD
STAGE ACROSS MUCH OF THE EASTERN MASSACHUSETTS SHORELINE. IN
ADDITION...MODEST SEAS JUST OFFSHORE OF 5 TO 8 FEET WILL RESULT IN BREAKING
WAVES OVER SEAWALLS AND OTHER COASTAL BARRIERS. THIS WILL ALSO YIELD
SOME BEACH EROSION. 

THIS WILL RESULT IN WIDESPREAD MINOR COASTAL FLOODING WITH POCKETS OF
MODERATE COASTAL FLOODING. THIS WILL TRANSLATE TO MANY SHORE ROADS
PARTIALLY FLOODED ALONG WITH A FEW ROAD CLOSURES. THE MOST VULNERABLE
LOCATIONS WILL BE NORTHEAST FACING SHORELINES. WE ARE NOT EXPECTING
MAJOR STRUCTURAL DAMAGE GIVEN THE LACK LARGE WAVE ACTION OFFSHORE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A COASTAL FLOOD ADVISORY IS ISSUED FOR MINOR COASTAL FLOODING OF
THE MOST VULNERABLE SHORE ROADS AND/OR BASEMENTS DUE TO THE
HEIGHT OF STORM TIDE OR WAVE SPLASHOVER.  THE MAJORITY OF ROADS
REMAIN PASSABLE WITH ONLY ISOLATED CLOSURES.  THERE IS NO
SIGNIFICANT THREAT TO LIFE AND ANY IMPACT ON PROPERTY IS MINIMAL.

&&

&&

ALL TIDE HEIGHTS ARE RELATIVE TO MEAN LOWER LOW WATER.
TIME OF HIGH TOTAL TIDES ARE APPROXIMATE TO THE NEAREST HOUR.

SCITUATE

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
     11.0    02/12 AM     9.7      1.3      4-5       NONE   
     13.3    02/12 PM    11.4      1.9      8-9     MODERATE 
     10.3    03/01 AM     9.9      0.4       11       NONE   
     11.5    03/01 PM    11.2      0.3      9-10     MINOR   
     11.1    04/01 AM    10.0      1.1      6-7       NONE

BOSTON HARBOR

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
     11.5    02/12 AM    10.2      1.3       1        NONE   
     13.9    02/12 PM    12.0      1.9       2      MODERATE 
     10.7    03/01 AM    10.4      0.3       2        NONE
     12.0    03/01 PM    11.8      0.2       3        NONE   
     11.6    04/01 AM    10.5      1.1       2        NONE

NEWBURYPORT

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      9.8    02/12 AM     8.5      1.3       5        NONE   
     11.6    02/12 PM     9.9      1.7      6-7      MINOR   
      9.2    03/01 AM     8.7      0.5       8        NONE
     10.3    03/01 PM     9.8      0.5      6-7       NONE   
      9.9    04/02 AM     8.8      1.1      4-5       NONE

GLOUCESTER HARBOR

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
     10.7    02/12 AM     9.4      1.3       5        NONE   
     12.8    02/12 PM    11.0      1.8      8-9      MINOR   
     10.1    03/12 AM     9.5      0.6     10-11      NONE   
     11.2    03/01 PM    10.9      0.3      8-10     MINOR   
     10.8    04/01 AM     9.7      1.1       6        NONE

SANDWICH HARBOR

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
     11.0    02/12 AM     9.8      1.2       2        NONE   
     13.2    02/12 PM    11.5      1.7      5-6     MODERATE 
     10.7    03/01 AM    10.0      0.7       8        NONE   
     11.9    03/01 PM    11.4      0.5       8       MINOR   
     11.2    04/02 AM    10.1      1.1      4-5       NONE

PROVINCETOWN HARBOR

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      9.7    02/12 AM     9.7      0.0       2        NONE
     11.4    02/12 PM    11.4      0.0      4-5       NONE   
     10.0    03/01 AM    10.0      0.0       8        NONE   
     11.3    03/01 PM    11.3      0.0       7        NONE   
     10.1    04/02 AM    10.1      0.0      3-4       NONE

CHATHAM - EAST COAST

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      8.4    02/12 AM     7.1      1.3      3-4       NONE   
     10.0    02/12 PM     8.2      1.8      7-9     MODERATE 
      7.8    03/01 AM     7.3      0.5     11-12      NONE   
      8.4    03/01 PM     8.2      0.2     10-12     MINOR   
      8.6    04/02 AM     7.5      1.1      6-7       NONE

CHATHAM - SOUTH COAST

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      7.5    02/12 AM     6.2      1.3       1        NONE   
      9.0    02/12 PM     7.2      1.8      3-4       NONE   
      7.0    03/01 AM     6.4      0.6      5-6       NONE   
      7.8    03/01 PM     7.2      0.6       4        NONE   
      7.5    04/02 AM     6.5      1.0       3        NONE

BUZZARDS BAY - WOODS HOLE

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      2.8    01/08 PM     1.9      0.9       1        NONE
      4.0    02/09 AM     2.8      1.2      1-3       NONE   
      3.1    02/09 PM     2.0      1.1       4        NONE
      1.9    03/10 AM     2.6     -0.7      3-4       NONE
      1.9    03/10 PM     2.1     -0.2      2-3       NONE
      3.2    04/11 AM     2.4      0.8       2        NONE

NANTUCKET

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      3.0    01/06 PM     2.0      1.0       3        NONE
      4.5    02/01 AM     3.2      1.3       3        NONE   
      5.9    02/01 PM     4.2      1.7      5-7      MINOR   
      3.8    03/01 AM     3.3      0.5       10       NONE   
      3.5    03/02 PM     4.0     -0.5       9        NONE
      4.5    04/03 AM     3.4      1.1       6        NONE

$$

NOCERA

See also

References

  1. ^ Baltimore/Washington National Weather Service Forecast Office. "Coastal Flood Advisory". http://www.erh.noaa.gov/lwx/Defined/index.htm. http://www.erh.noaa.gov/lwx/Defined/index.htm. Retrieved 17 May 2011. 
  2. ^ National Weather Service. "Coastal Flood Advisory". Iowa Environmental Mesonet NWS Product Archive. http://mesonet.agron.iastate.edu/vtec/2010-O-NEW-KBOX-CF-S-0001.html#2010-O-NEW-KBOX-CF-Y-0001. Retrieved 17 May 2011. 

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