Coastal flood watch

A Coastal Flood Watch 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 possible. 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 Watch.[1]

Contents

Example

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


290 
WHUS41 KBOX 252110
CFWBOX

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
410 PM EST TUE JAN 25 2011

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

MAZ007-015-016-019-022-260515-
/O.NEW.KBOX.CF.A.0001.110127T0600Z-110127T1300Z/
EASTERN ESSEX MA-SUFFOLK MA-EASTERN NORFOLK MA-
EASTERN PLYMOUTH MA-BARNSTABLE MA-
410 PM EST TUE JAN 25 2011

...COASTAL FLOOD WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT
THROUGH THURSDAY MORNING...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A COASTAL
FLOOD WATCH...WHICH IS IN EFFECT FROM LATE WEDNESDAY NIGHT
THROUGH THURSDAY MORNING. 

A COASTAL FLOOD WATCH HAS BEEN ISSUED FOR THE EASTERN
MASSACHUSETTS COAST FOR THE EARLY THURSDAY MORNING HIGH TIDE CYCLE.

A RAPIDLY INTENSIFYING NOREASTER WILL PASS SOUTHEAST OF NANTUCKET
LATE WEDNESDAY INTO EARLY THURSDAY. STRONG NORTHEAST WINDS WILL
CAUSE SEAS TO RAPIDLY BUILD WEDNESDAY NIGHT. THIS WILL LIKELY
YIELD A 2 TO 2.5 FOOT STORM SURGE DURING THE EARLY THURSDAY
MORNING HIGH TIDE.

THIS WILL RESULT IN MINOR TO POCKETS OF LOW END MODERATE COASTAL
FLOODING DURING THE EARLY THURSDAY MORNING HIGH TIDE CYCLE ACROSS
THE EASTERN MASSACHUSETTS COAST. IN ADDITION...THERE IS ALSO THE
POTENTIAL FOR SOME BEACH EROSION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A COASTAL FLOOD WATCH MEANS THAT THE POTENTIAL EXISTS FOR
MODERATE OR MAJOR 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.
NUMEROUS ROAD CLOSURES ARE NEEDED. LIVES MAY BE AT RISK FOR
PEOPLE WHO PUT THEMSELVES IN HARMS WAY. ISOLATED STRUCTURAL
DAMAGE MAY BE OBSERVED.

MAJOR COASTAL FLOODING IS CONSIDERED SEVERE ENOUGH TO CAUSE AT
LEAST SCATTERED STRUCTURAL DAMAGE ALONG WITH WIDESPREAD FLOODING
OF VULNERABLE SHORE ROADS AND/OR BASEMENTS.  SOME VULNERABLE
HOMES WILL BE SEVERELY DAMAGED OR DESTROYED.  NUMEROUS ROADS ARE
IMPASSABLE...SOME WITH WASHOUTS SEVERE ENOUGH TO BE LIFE-
THREATENING IF ONE ATTEMPTED TO CROSS ON FOOT OR BY VEHICLE. SOME
NEIGHBORHOODS WILL BE ISOLATED. EVACUATION OF SOME NEIGHBORHOODS
MAY BE NECESSARY.

&&

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
   -------  ----------  -------  -------  -------  ----------
      9.7    25/03 PM    10.0     -0.3       1        NONE
     10.6    26/04 AM    10.7     -0.1       1        NONE
      9.6    26/04 PM     9.4      0.2       1        NONE
     12.7    27/05 AM    10.4      2.3       2        NONE
      9.3    27/06 PM     8.9      0.4      1-2       NONE
     10.3    28/06 AM    10.2      0.1       1        NONE

NEWBURYPORT

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      8.3    25/04 PM     8.3      0.0       1        NONE
      8.7    26/04 AM     8.7      0.0       1        NONE
      8.0    26/05 PM     7.8      0.2      1-2       NONE
     10.6    27/05 AM     8.5      2.1      6-9       NONE
      7.8    27/06 PM     7.4      0.4      4-6       NONE
      8.4    28/06 AM     8.3      0.1      1-2       NONE

GLOUCESTER HARBOR

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      8.9    25/03 PM     9.2     -0.3      1-2       NONE
      9.7    26/04 AM     9.8     -0.1       1        NONE
      8.8    26/04 PM     8.6      0.2       2        NONE
     11.8    27/05 AM     9.6      2.2      7-10     MINOR
      8.6    27/06 PM     8.2      0.4      5-7       NONE
      9.5    28/06 AM     9.4      0.1       2        NONE

REVERE

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      9.2    25/03 PM     9.5     -0.3       1        NONE
     10.1    26/04 AM    10.2     -0.1       1        NONE
      9.1    26/04 PM     8.9      0.2      1-2       NONE
     12.2    27/05 AM     9.9      2.3      6-8      MINOR
      8.9    27/06 PM     8.5      0.4      4-5       NONE
      9.8    28/06 AM     9.7      0.1      1-2       NONE

SANDWICH HARBOR

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      9.6    25/04 PM     9.6      0.0       1        NONE
     10.2    26/04 AM    10.2      0.0       1        NONE
      9.3    26/05 PM     9.0      0.3      1-2       NONE
     12.2    27/05 AM    10.0      2.2      7-8      MINOR
      9.1    27/06 PM     8.6      0.5      3-4       NONE
      9.9    28/06 AM     9.8      0.1      1-2       NONE

PROVINCETOWN HARBOR

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      9.6    25/04 PM     9.6      0.0       1        NONE
     10.1    26/04 AM    10.1      0.0       1        NONE
      9.3    26/05 PM     9.0      0.3       1        NONE
     12.2    27/05 AM     9.9      2.3       3       MINOR
      8.9    27/06 PM     8.5      0.4       2        NONE
      9.8    28/06 AM     9.7      0.1       2        NONE

CHATHAM - EAST COAST

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      6.7    25/04 PM     7.0     -0.3      1-2       NONE
      7.3    26/04 AM     7.4     -0.1       1        NONE
      6.9    26/05 PM     6.6      0.3      2-4       NONE
      9.5    27/05 AM     7.2      2.3     13-15    MODERATE
      6.6    27/06 PM     6.2      0.4      6-9       NONE
      7.0    28/06 AM     7.0      0.0       3        NONE

CHATHAM - SOUTH COAST

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      6.2    25/04 PM     6.2      0.0       1        NONE
      6.4    26/04 AM     6.4      0.0       1        NONE
      6.1    26/05 PM     5.8      0.3      1-2       NONE
      8.3    27/05 AM     6.3      2.0       4        NONE
      5.9    27/06 PM     5.5      0.4       2        NONE
      6.2    28/07 AM     6.2      0.0       2        NONE

BUZZARDS BAY - WOODS HOLE

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      1.9    26/01 AM     2.2     -0.3       1        NONE
      1.5    26/01 PM     1.5      0.0       1        NONE
      3.8    27/02 AM     2.1      1.7      2-3       NONE
      2.1    27/02 PM     1.3      0.8      2-3       NONE
      1.9    28/03 AM     2.0     -0.1       2        NONE

SCITUATE

    TOTAL                ASTRO
     TIDE    DAY/TIME     TIDE    SURGE    WAVES      FLOOD
     /FT/                 /FT/     /FT/     /FT/    CATEGORY
   -------  ----------  -------  -------  -------  ----------
      9.2    25/04 PM     9.5     -0.3       1        NONE
     10.0    26/04 AM    10.1     -0.1       1        NONE
      9.1    26/04 PM     8.9      0.2      1-2       NONE
     12.2    27/05 AM     9.9      2.3      7-10     MINOR
      8.8    27/06 PM     8.4      0.4      5-7       NONE
      9.8    28/06 AM     9.7      0.1       2        NONE

$$

FRANK

See also

References

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

External links


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