Coastal Flood Statement and High Surf Advisory - 9/8/18
Cape Cod and Nantucket
Flooding at Sandy Neck during one of the March storms (Town of Barnstable photo)
From the National Weather Service:
Coastal Hazard Message
National Weather Service Boston/Norton MA
352 PM EDT Sat Sep 8 2018
MAZ022-024-090400-
/O.NEW.KBOX.SU.Y.0002.180909T1400Z-180910T0000Z/
/O.NEW.KBOX.CF.S.0012.180909T0100Z-180909T0500Z/
Barnstable MA-Nantucket MA-
352 PM EDT Sat Sep 8 2018
...HIGH SURF ADVISORY IN EFFECT FROM 10 AM TO 8 PM EDT SUNDAY...
...COASTAL FLOOD STATEMENT FOR LATE EVENING HIGH TIDE TONIGHT...
* LOCATIONS...Cape Cod and Nantucket.
* TIMING...Minor splashover late this evening, mainly at eastern
facing coastlines. High surf and a high risk for rip currents
late Sunday morning into Sunday night, primarily at south facing
beaches.
* COASTAL FLOOD IMPACTS...Typically prone locations may experience
minor splashover and coastal inundation around the time of high
tide late this evening.
* SURF ZONE IMPACTS...Large breaking waves will be dangerous to
anyone who enters the surf. A high risk for rip currents is also
expected.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A rip current, sometimes mistakenly called an undertow, is a
strong but narrow current of water flowing from the beach to the
surf zone. It can rapidly carry a swimmer into deeper water, and
exhaust an individual trying to swim against it.
If you are a poor swimmer and are caught in a rip current, swim
parallel to the beach until out of its pull, then swim back to
shore. Another means of escape for good swimmers is to ride the
current out until it dissipates, then swim back to shore outside
of the rip current.
Do not attempt to swim directly into the rip current, it can
exhaust and drown even the strongest swimmer.
Heed the advice of the beach patrol and swim only at guarded
beaches. Be especially cautious near piers and jetties, where rip
currents can be enhanced.
In addition, viewers of large surf should stay in safe areas well
away from possible splashover. Individual waves may be more than
twice the average wave height, which can sweep a person into the
water from what may seem to be a safe viewing area. Falling into
turbulent and sometimes rocky waters can result in injury that
reduces the chance of survival.
&&
Time of high total tides are approximate to the nearest hour.
Category thresholds are based on still water levels. Impacts
may be greater, depending upon wave action.
Sandwich / Dennis
MLLW Categories - Minor 13.0 FT, Moderate 14.0 FT, Major 15.5 FT
MHHW Categories - Minor 2.7 FT, Moderate 3.7 FT, Major 5.2 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
08/11 PM 11.2/11.7 0.9/ 1.4 -0.2/ 0.3 2 None
09/11 AM 10.6/11.1 0.2/ 0.8 0.1/ 0.6 3 None
10/12 AM 11.5/12.0 1.2/ 1.7 0.1/ 0.6 3 None
10/12 PM 11.3/11.8 1.0/ 1.5 0.4/ 0.9 4 None
Provincetown Harbor
MLLW Categories - Minor 12.5 FT, Moderate 13.5 FT, Major 15.0 FT
MHHW Categories - Minor 2.4 FT, Moderate 3.4 FT, Major 4.9 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
08/11 PM 11.6/12.1 1.5/ 2.0 -0.2/ 0.2 2 None
09/11 AM 10.9/11.4 0.8/ 1.3 0.0/ 0.5 2-3 None
10/12 AM 11.9/12.4 1.8/ 2.2 0.0/ 0.5 2 None
10/12 PM 11.6/12.1 1.5/ 2.0 0.2/ 0.8 3-4 None
Chatham - East Coast
MLLW Categories - Minor 9.5 FT, Moderate 12.0 FT, Major 13.0 FT
MHHW Categories - Minor 1.8 FT, Moderate 4.3 FT, Major 5.3 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
09/12 AM 6.4/ 6.9 -1.4/-0.9 -0.2/ 0.2 4 None
09/12 PM 5.9/ 6.4 -1.9/-1.4 0.0/ 0.5 5 None
10/01 AM 6.6/ 7.1 -1.1/-0.7 0.0/ 0.5 5-6 None
10/01 PM 6.4/ 6.9 -1.4/-0.9 0.2/ 0.8 8 None
Chatham - South Coast
MLLW Categories - Minor 9.0 FT, Moderate 10.5 FT, Major 11.5 FT
MHHW Categories - Minor 4.5 FT, Moderate 6.0 FT, Major 7.0 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
09/12 AM 4.4/ 4.9 -0.2/ 0.3 -0.2/ 0.2 2 None
09/12 PM 4.0/ 4.5 -0.6/-0.1 0.0/ 0.5 2 None
10/01 AM 4.6/ 5.1 0.1/ 0.6 0.0/ 0.5 2-3 None
10/01 PM 4.6/ 5.1 0.1/ 0.6 0.5/ 1.0 3-4 None
Buzzards Bay - Woods Hole
MLLW Categories - Minor 5.5 FT, Moderate 7.0 FT, Major 8.5 FT
MHHW Categories - Minor 3.5 FT, Moderate 5.0 FT, Major 6.5 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
08/08 PM 3.0/ 3.5 1.0/ 1.5 -0.2/ 0.2 1 None
09/08 AM 3.1/ 3.6 1.1/ 1.6 0.0/ 0.5 2 None
09/09 PM 3.4/ 3.9 1.4/ 1.9 0.2/ 0.7 2 None
10/09 AM 3.6/ 4.1 1.6/ 2.0 0.4/ 0.9 2-3 None
Wings Neck
MLLW Categories - Minor 6.5 FT, Moderate 9.0 FT, Major 11.5 FT
MHHW Categories - Minor 2.2 FT, Moderate 4.7 FT, Major 7.2 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
08/08 PM 5.1/ 5.6 0.8/ 1.3 -0.2/ 0.3 1 None
09/08 AM 5.2/ 5.7 1.0/ 1.5 0.1/ 0.6 1 None
09/09 PM 5.4/ 5.9 1.1/ 1.6 0.2/ 0.7 1 None
10/09 AM 5.7/ 6.2 1.4/ 1.9 0.4/ 0.9 1-3 None
Nantucket Harbor
MLLW Categories - Minor 5.0 FT, Moderate 6.5 FT, Major 8.0 FT
MHHW Categories - Minor 1.4 FT, Moderate 2.9 FT, Major 4.4 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
09/12 AM 3.7/ 4.2 0.1/ 0.6 -0.2/ 0.2 3 None
09/12 PM 3.4/ 3.9 -0.2/ 0.2 0.0/ 0.5 3-4 None
10/01 AM 3.9/ 4.4 0.2/ 0.8 0.1/ 0.6 4 None
10/01 PM 3.9/ 4.4 0.2/ 0.8 0.4/ 0.9 5 None
Nantucket East Coast - Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
09/12 AM 4.0/ 4.5 0.0/ 0.5 -0.2/ 0.2 4 None
09/12 PM 3.7/ 4.2 -0.3/ 0.2 0.0/ 0.5 5 None
10/01 AM 4.2/ 4.7 0.2/ 0.7 0.1/ 0.6 6 None
10/01 PM 4.5/ 5.0 0.4/ 0.9 0.5/ 1.0 7-8 None
Nantucket - Madaket Area Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
09/12 AM 2.6/ 3.1 1.2/ 1.7 -0.2/ 0.2 3 None
09/12 PM 2.6/ 3.1 1.2/ 1.7 0.0/ 0.5 3-4 None
10/12 AM 2.8/ 3.4 1.5/ 2.0 0.1/ 0.6 4 None
10/01 PM 3.0/ 3.5 1.6/ 2.0 0.4/ 0.9 5 None
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