Coastal flood warning

A Coastal Flood Warning is issued by the National Weather Service of the United States when coastal flooding is either imminent or occurring along the coast of the Atlantic Ocean, Pacific Ocean, or the Gulf of Mexico. The flooding must be due to water being forced from the nearby body of water onto the land, and not from rainfall. Nor'easters, hurricanes, tropical storms, and thunderstorms can all lead to the issuance of a Coastal Flood Warning.[1]

Contents

Example

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


613 
WHUS41 KBOX 262050
CFWBOX

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
350 PM EST WED JAN 26 2011

...POCKETS OF LOW END MODERATE COASTAL FLOODING POSSIBLE DURING
THE EARLY THURSDAY MORNING HIGH TIDE CYCLE...

MAZ007-015-016-019-022-270500-
/O.UPG.KBOX.CF.A.0001.110127T0600Z-110127T1300Z/
/O.NEW.KBOX.CF.W.0001.110127T0600Z-110127T1300Z/
EASTERN ESSEX MA-SUFFOLK MA-EASTERN NORFOLK MA-
EASTERN PLYMOUTH MA-BARNSTABLE MA-
350 PM EST WED JAN 26 2011

...COASTAL FLOOD WARNING IN EFFECT FROM 1 AM TO 8 AM EST
THURSDAY...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A COASTAL
FLOOD WARNING...WHICH IS IN EFFECT FROM 1 AM TO 8 AM EST
THURSDAY. THE COASTAL FLOOD WATCH IS NO LONGER IN EFFECT. 

STRONG NORTHEAST WINDS WILL CAUSE SEAS TO BUILD RAPIDLY
TONIGHT. THIS IS EXPECTED TO RESULT IN A STORM SURGE OF 2.0 TO
2.5 FEET AROUND THE TIME OF HIGH TIDE EARLY THURSDAY MORNING.

THIS WILL RESULT IN MINOR COASTAL FLOODING...WITH THE POSSIBILITY
OF LOW END MODERATE COASTAL FLOODING IN A FEW LOCATIONS. THERE IS
ALSO THE POTENTIAL FOR BEACH EROSION...ESPECIALLY ALONG OUTER CAPE
COD. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A COASTAL FLOOD WATCH MEANS THAT THE POTENTIAL EXISTS FOR
MODERATE COASTAL FLOODING. MODERATE COASTAL FLOODING PRODUCES
WIDESPREAD FLOODING OF VULNERABLE SHORE ROADS AND/OR BASEMENTS
DUE TO THE HEIGHT OF STORM TIDE AND/OR WAVE ACTION. SOME ROAD
CLOSURES MAY BE NEEDED.

&&

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

BOSTON HARBOR

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      9.5    26/04 PM     9.4      0.1      1-2       NONE
     11.7    27/05 AM    10.4      1.3      2-3       NONE
      9.0    27/06 PM     8.9      0.1       1        NONE
     10.3    28/06 AM    10.2      0.1       1        NONE
      8.7    29/07 PM     8.6      0.1       1        NONE
     10.3    29/07 AM    10.1      0.2       1        NONE

NEWBURYPORT

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      7.9    26/05 PM     7.8      0.1      1-4       NONE
      9.6    27/05 AM     8.5      1.1       8        NONE
      7.6    27/06 PM     7.4      0.2      4-6       NONE
      8.4    28/06 AM     8.3      0.1      2-3       NONE
      7.3    29/07 PM     7.2      0.1       1        NONE
      8.4    29/07 AM     8.2      0.2       1        NONE

GLOUCESTER HARBOR

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      8.7    26/04 PM     8.6      0.1      2-4       NONE
     10.8    27/05 AM     9.6      1.2      9-10      NONE
      8.4    27/06 PM     8.2      0.2      5-7       NONE
      9.5    28/06 AM     9.4      0.1      3-4       NONE
      8.1    29/07 PM     8.0      0.1       2        NONE
      9.5    29/07 AM     9.3      0.2       2        NONE

REVERE

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      9.0    26/04 PM     8.9      0.1       3        NONE
     11.2    27/05 AM     9.9      1.3      7-8       NONE
      8.6    27/06 PM     8.5      0.1      4-6       NONE
      9.8    28/06 AM     9.7      0.1      2-3       NONE
      8.3    29/07 PM     8.2      0.1       2        NONE
      9.8    29/07 AM     9.6      0.2       1        NONE

SANDWICH HARBOR

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      9.3    26/05 PM     9.0      0.3      2-3       NONE
     11.3    27/05 AM    10.0      1.3      7-9      MINOR
      8.8    27/06 PM     8.6      0.2      3-4       NONE
      9.9    28/06 AM     9.8      0.1      2-3       NONE
      8.4    29/07 PM     8.3      0.1      1-2       NONE
      9.8    29/07 AM     9.7      0.1       1        NONE

PROVINCETOWN HARBOR

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      9.2    26/05 PM     9.0      0.2      1-3       NONE
     11.3    27/05 AM     9.9      1.4      5-6       NONE
      8.7    27/06 PM     8.5      0.2      3-4       NONE
      9.8    28/06 AM     9.7      0.1      2-3       NONE
      8.3    29/07 PM     8.2      0.1       1        NONE
      9.7    29/07 AM     9.5      0.2      1-2       NONE

CHATHAM - EAST COAST

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      6.8    26/05 PM     6.6      0.2      3-5       NONE
      8.6    27/05 AM     7.2      1.4     12-13     MINOR
      6.4    27/06 PM     6.2      0.2      6-8       NONE
      7.0    28/06 AM     7.0      0.0      3-4       NONE
      6.1    29/07 PM     6.0      0.1      1-2       NONE
      7.2    29/08 AM     7.0      0.2      1-2       NONE

CHATHAM - SOUTH COAST

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      6.1    26/05 PM     5.8      0.3       2        NONE
      7.6    27/05 AM     6.3      1.3       4        NONE
      5.6    27/06 PM     5.5      0.1       2        NONE
      6.2    28/07 AM     6.2      0.0       1        NONE
      5.4    29/07 PM     5.3      0.1       1        NONE
      6.3    29/07 AM     6.1      0.2       1        NONE

BUZZARDS BAY - WOODS HOLE

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      1.1    26/03 PM     1.0      0.1       2        NONE
      3.1    27/02 AM     2.1      1.0       3        NONE
      1.9    27/02 PM     1.3      0.6       2        NONE
      1.8    28/03 AM     2.0     -0.2       1        NONE
      1.2    28/03 PM     1.2      0.0      1-2       NONE
      2.1    29/04 AM     2.0      0.1       1        NONE

SCITUATE

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      9.0    26/04 PM     8.9      0.1      3-4       NONE
     11.2    27/05 AM     9.9      1.3      9-10     MINOR
      8.5    27/06 PM     8.4      0.1      5-7       NONE
      9.8    28/06 AM     9.7      0.1      3-4       NONE
      8.3    29/07 PM     8.2      0.1       2        NONE
      9.8    29/07 AM     9.6      0.2       2        NONE

$$

See also

References

  1. ^ National Weather Service. "Coastal Flood Warning". Glossary - JetStream - Online School for Weather. http://www.srh.noaa.gov/jetstream//append/glossary_c.htm#cfwarning. Retrieved 17 May 2011. 
  2. ^ National Weather Service. "Coastal Flood Warning". Iowa Environmental Mesonet NWS Product Archive. http://mesonet.agron.iastate.edu/vtec/2011-O-NEW-KBOX-CF-S-0004.html#2011-O-NEW-KBOX-CF-W-0001. Retrieved 17 May 2011. 

External links


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