Alert archive / Massachusetts / Coastal Flood Statements in 2021
Coastal Flood Statement 7, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this coastal flood statement at May 29, 2021, 4:03 AM EDT for 6 counties in Massachusetts. It took effect at May 30, 2021, 2:00 AM EDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- May 29, 2021, 4:03 AM EDT (08:03 UTC)
- In effect from
- May 30, 2021, 2:00 AM EDT
- Expired
- May 29, 2021, 3:52 PM EDT
- In force
- Issued by
- NWS Boston/Norton, MA
Counties Barnstable County, MA, Essex County, MA, Nantucket County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA
The radar
The Boston radar (KBOX), 37 km from the middle of the area, began a volume at 08:05 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Gray, ME (KGYX), launched 00:00Z, 8.1 hours before the alert went out and 211 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1712 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
619
WHUS41 KBOX 290803
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
403 AM EDT Sat May 29 2021
MAZ007-015-016-019-022-024-292115-
/O.EXP.KBOX.CF.S.0006.000000T0000Z-210529T0800Z/
/O.NEW.KBOX.CF.S.0007.210530T0600Z-210530T0900Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Nantucket MA-
403 AM EDT Sat May 29 2021
* WHAT...Up to one half foot of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways (2.7 to 13.0 feet Mean Lower Low Water).
* WHERE...Eastern Plymouth MA, Suffolk MA, Eastern Essex MA,
Barnstable MA, Eastern Norfolk MA and Nantucket MA Counties.
* WHEN...Late tonight.
* IMPACTS...Minor splashover possible on vulnerable low lying
coastal roads around the time of high tide early Sunday
morning.
* ADDITIONAL DETAILS...The high tide at Boston is at 236 AM
Sunday. The high tide at Nantucket is at 350 AM Sunday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
&&
&&
Time of high total tides are approximate to the nearest hour.
Merrimack River near Newburyport MA
MLLW Categories - Minor 11.0 ft, Moderate 12.0 ft, Major 13.5 ft
MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 4.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/02 AM 10.0/10.5 0.5/ 1.0 -0.2/ 0.2 2-3 None
29/03 PM 9.1/ 9.6 -0.5/ 0.0 0.6/ 1.1 8-9 None
30/03 AM 10.4/10.9 0.9/ 1.4 0.5/ 1.0 7-8 None
30/04 PM 8.8/ 9.3 -0.8/-0.2 0.5/ 1.0 8 None
Gloucester Harbor
MLLW Categories - Minor 11.5 ft, Moderate 13.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.0 ft, Moderate 3.5 ft, Major 5.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/02 AM 11.3/11.8 1.8/ 2.2 0.0/ 0.5 3-4 Minor
29/03 PM 10.1/10.6 0.6/ 1.1 0.5/ 1.0 9-10 None
30/03 AM 11.4/11.9 1.9/ 2.3 0.5/ 1.0 8-9 Minor
30/03 PM 9.7/10.2 0.2/ 0.7 0.2/ 0.8 8-9 None
Revere
MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.6 ft, Moderate 4.6 ft, Major 6.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/02 AM 12.0/12.5 2.1/ 2.6 0.2/ 0.8 2 None
29/03 PM 10.7/11.2 0.8/ 1.3 0.8/ 1.3 2 None
30/03 AM 11.7/12.2 1.8/ 2.2 0.5/ 1.0 2 None
30/03 PM 10.3/10.8 0.4/ 0.9 0.7/ 1.1 2 None
Boston Harbor
MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.4 ft, Moderate 4.4 ft, Major 5.9 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/02 AM 11.8/12.3 1.7/ 2.2 0.0/ 0.5 2 None
29/03 PM 11.0/11.5 0.9/ 1.4 0.9/ 1.4 2 None
30/03 AM 11.9/12.4 1.8/ 2.2 0.5/ 1.0 2 None
30/03 PM 10.5/11.0 0.4/ 0.9 0.7/ 1.1 2 None
Scituate MA
MLLW Categories - Minor 11.5 ft, Moderate 13.5 ft, Major 15.5 ft
MHHW Categories - Minor 1.8 ft, Moderate 3.8 ft, Major 5.8 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/02 AM 11.6/12.1 1.9/ 2.3 0.2/ 0.7 3-5 Minor
29/02 PM 10.1/10.6 0.4/ 0.9 0.5/ 1.0 8-9 None
30/03 AM 11.5/12.0 1.8/ 2.2 0.5/ 1.0 8 Minor
30/03 PM 9.8/10.3 0.1/ 0.6 0.5/ 1.0 7-8 None
Chatham - South side
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
-------- --------- --------- --------- ------- --------
29/03 AM 5.2/ 5.7 0.7/ 1.1 0.1/ 0.6 3-4 None
29/03 PM 4.4/ 4.9 -0.2/ 0.3 0.7/ 1.1 5 None
30/04 AM 5.5/ 6.0 1.0/ 1.5 0.6/ 1.1 4 None
30/04 PM 4.2/ 4.7 -0.3/ 0.2 0.5/ 1.0 3 None
Wings Neck
MLLW Categories - Minor 6.5 ft, Moderate 9.0 ft, Major 11.5 ft
MHHW Categories - Minor 2.1 ft, Moderate 4.6 ft, Major 7.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/11 AM 3.7/ 4.2 -0.7/-0.2 -0.6/-0.1 3 None
29/11 PM 4.7/ 5.2 0.4/ 0.9 0.0/ 0.5 3 None
30/12 PM 4.0/ 4.5 -0.3/ 0.2 0.0/ 0.5 2 None
31/12 AM 4.7/ 5.2 0.2/ 0.8 0.2/ 0.7 2 None
Provincetown Harbor
MLLW Categories - Minor 13.0 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.9 ft, Moderate 3.9 ft, Major 4.9 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/02 AM 11.8/12.3 1.7/ 2.2 0.0/ 0.5 3 None
29/03 PM 10.6/11.1 0.5/ 1.0 0.6/ 1.1 3 None
30/03 AM 11.9/12.4 1.8/ 2.2 0.5/ 1.0 3 None
30/04 PM 10.3/10.8 0.2/ 0.7 0.5/ 1.0 1-3 None
Buzzards Bay at 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
-------- --------- --------- --------- ------- --------
29/11 AM 2.5/ 3.0 0.5/ 1.0 0.0/ 0.5 3 None
30/12 AM 3.2/ 3.7 1.3/ 1.8 0.4/ 0.9 3 None
30/12 PM 2.5/ 3.0 0.5/ 1.0 0.1/ 0.6 2-3 None
Dennis - Sesuit Harbor
MLLW Categories - Minor 13.0 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.5 ft, Moderate 4.0 ft, Major 5.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/02 AM 12.3/12.8 1.8/ 2.2 -0.2/ 0.3 3 None
29/03 PM 11.3/11.8 0.8/ 1.3 0.9/ 1.4 3 None
30/03 AM 12.8/13.3 2.2/ 2.7 0.8/ 1.3 3 Minor
30/03 PM 10.9/11.4 0.4/ 0.9 0.6/ 1.1 1-2 None
Chatham MA - East Coast
MLLW Categories - Minor 9.0 ft, Moderate 11.5 ft, Major 13.0 ft
MHHW Categories - Minor 1.3 ft, Moderate 3.8 ft, Major 5.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 AM 6.0/ 6.5 -1.8/-1.3 0.1/ 0.6 4-7 None
29/04 PM 5.5/ 6.0 -2.2/-1.8 0.9/ 1.4 11 None
30/04 AM 6.5/ 7.0 -1.3/-0.8 0.8/ 1.3 8-9 None
30/04 PM 5.1/ 5.6 -2.7/-2.2 0.6/ 1.1 5-6 None
Sandwich Harbor
MLLW Categories - Minor 12.0 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 1.7 ft, Moderate 3.7 ft, Major 4.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/02 AM 10.8/11.3 0.5/ 1.0 0.2/ 0.7 3-4 None
29/03 PM 9.5/10.0 -0.9/-0.4 0.7/ 1.1 5-6 None
30/03 AM 10.8/11.3 0.5/ 1.0 0.6/ 1.1 4-5 None
30/03 PM 9.1/ 9.6 -1.3/-0.8 0.5/ 1.0 3-4 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
-------- --------- --------- --------- ------- --------
29/03 AM 4.5/ 5.0 0.9/ 1.4 0.5/ 1.0 4-5 None
29/04 PM 3.6/ 4.1 0.0/ 0.5 0.7/ 1.1 5-6 None
30/04 AM 4.4/ 4.9 0.8/ 1.3 0.5/ 1.0 4-5 None
30/05 PM 3.2/ 3.7 -0.5/ 0.0 0.2/ 0.8 2-3 None
&&
$$2 follow-up statements
213
WHUS41 KBOX 291416
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
1016 AM EDT Sat May 29 2021
MAZ007-015-016-019-022-024-300330-
/O.CON.KBOX.CF.S.0007.210530T0600Z-210530T0900Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Nantucket MA-
1016 AM EDT Sat May 29 2021
* WHAT...Up to one half foot of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways (2.7 to 13.0 feet Mean Lower Low Water).
* WHERE...Eastern Plymouth MA, Suffolk MA, Eastern Essex MA,
Barnstable MA, Eastern Norfolk MA and Nantucket MA Counties.
* WHEN...Late tonight.
* IMPACTS...Minor coastal flooding is expected along the North
Shore from Gloucester to Newburyport. Wave action will likely
cause some washover onto coastal roads around the time of high
tide.
* ADDITIONAL DETAILS...The high tide at Boston is at 236 AM
Sunday. The high tide at Nantucket is at 350 AM Sunday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
&&
&&
Time of high total tides are approximate to the nearest hour.
Merrimack River near Newburyport MA
MLLW Categories - Minor 11.0 ft, Moderate 12.0 ft, Major 13.5 ft
MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 4.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 9.1/ 9.6 -0.5/ 0.0 0.6/ 1.1 8-9 None
30/03 AM 10.4/10.9 0.9/ 1.4 0.5/ 1.0 7-8 None
30/04 PM 8.8/ 9.3 -0.8/-0.2 0.5/ 1.0 8 None
31/04 AM 9.6/10.1 0.1/ 0.6 0.2/ 0.7 1 None
31/05 PM 8.2/ 8.7 -1.4/-0.9 0.1/ 0.6 1 None
Gloucester Harbor
MLLW Categories - Minor 11.5 ft, Moderate 13.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.0 ft, Moderate 3.5 ft, Major 5.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 10.1/10.6 0.6/ 1.1 0.5/ 1.0 9-10 None
30/03 AM 11.4/11.9 1.9/ 2.3 0.5/ 1.0 8-9 Minor
30/03 PM 9.7/10.2 0.2/ 0.7 0.2/ 0.8 8-9 None
31/04 AM 10.4/10.9 0.9/ 1.4 0.1/ 0.6 5 None
31/04 PM 9.1/ 9.6 -0.5/ 0.0 0.0/ 0.5 3 None
Revere
MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.6 ft, Moderate 4.6 ft, Major 6.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 10.7/11.2 0.8/ 1.3 0.8/ 1.3 2 None
30/03 AM 11.7/12.2 1.8/ 2.2 0.5/ 1.0 2 None
30/03 PM 10.3/10.8 0.4/ 0.9 0.7/ 1.1 2 None
31/04 AM 11.1/11.6 1.2/ 1.7 0.4/ 0.9 1 None
31/04 PM 9.5/10.0 -0.5/ 0.0 0.2/ 0.7 1 None
Boston Harbor
MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.4 ft, Moderate 4.4 ft, Major 5.9 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 11.0/11.5 0.9/ 1.4 0.9/ 1.4 2 None
30/03 AM 11.9/12.4 1.8/ 2.2 0.5/ 1.0 2 None
30/03 PM 10.5/11.0 0.4/ 0.9 0.7/ 1.1 2 None
31/04 AM 11.2/11.7 1.1/ 1.6 0.4/ 0.9 1-2 None
31/04 PM 9.8/10.3 -0.3/ 0.2 0.2/ 0.8 1-2 None
Scituate MA
MLLW Categories - Minor 11.5 ft, Moderate 13.5 ft, Major 15.5 ft
MHHW Categories - Minor 1.8 ft, Moderate 3.8 ft, Major 5.8 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/02 PM 10.1/10.6 0.4/ 0.9 0.5/ 1.0 8-9 None
30/03 AM 11.5/12.0 1.8/ 2.2 0.5/ 1.0 8 Minor
30/03 PM 9.8/10.3 0.1/ 0.6 0.5/ 1.0 7-8 None
31/04 AM 10.7/11.2 1.0/ 1.5 0.2/ 0.7 4-5 None
31/04 PM 9.2/ 9.7 -0.6/-0.1 0.1/ 0.6 3 None
Chatham - South side
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
-------- --------- --------- --------- ------- --------
29/03 PM 4.4/ 4.9 -0.2/ 0.3 0.7/ 1.1 5 None
30/04 AM 5.5/ 6.0 1.0/ 1.5 0.6/ 1.1 4 None
30/04 PM 4.2/ 4.7 -0.3/ 0.2 0.5/ 1.0 3 None
31/04 AM 5.1/ 5.6 0.6/ 1.1 0.5/ 1.0 3-4 None
31/05 PM 3.9/ 4.4 -0.7/-0.2 0.2/ 0.7 3 None
Wings Neck
MLLW Categories - Minor 6.5 ft, Moderate 9.0 ft, Major 11.5 ft
MHHW Categories - Minor 2.1 ft, Moderate 4.6 ft, Major 7.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/11 AM 3.7/ 4.2 -0.7/-0.2 -0.6/-0.1 3 None
29/11 PM 4.7/ 5.2 0.4/ 0.9 0.0/ 0.5 3 None
30/12 PM 4.0/ 4.5 -0.3/ 0.2 0.0/ 0.5 2 None
31/12 AM 4.7/ 5.2 0.2/ 0.8 0.2/ 0.7 1-2 None
31/01 PM 3.9/ 4.4 -0.6/-0.1 -0.2/ 0.3 1 None
01/01 AM 3.7/ 4.2 -0.7/-0.2 -0.5/ 0.0 1 None
Provincetown Harbor
MLLW Categories - Minor 13.0 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.9 ft, Moderate 3.9 ft, Major 4.9 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 10.6/11.1 0.5/ 1.0 0.6/ 1.1 3 None
30/03 AM 11.9/12.4 1.8/ 2.2 0.5/ 1.0 3 None
30/04 PM 10.3/10.8 0.2/ 0.7 0.5/ 1.0 1-3 None
31/04 AM 11.1/11.6 1.0/ 1.5 0.2/ 0.7 3-4 None
31/05 PM 9.6/10.1 -0.6/-0.1 0.1/ 0.6 2-3 None
Buzzards Bay at 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
-------- --------- --------- --------- ------- --------
29/11 AM 2.5/ 3.0 0.5/ 1.0 0.0/ 0.5 3 None
30/12 AM 3.2/ 3.7 1.3/ 1.8 0.4/ 0.9 3 None
30/12 PM 2.5/ 3.0 0.5/ 1.0 0.1/ 0.6 2-3 None
31/01 AM 2.8/ 3.4 0.9/ 1.4 0.2/ 0.7 2 None
31/01 PM 2.2/ 2.7 0.2/ 0.7 -0.2/ 0.3 2 None
01/02 AM 2.0/ 2.5 0.0/ 0.5 -0.6/-0.1 1 None
Dennis - Sesuit Harbor
MLLW Categories - Minor 13.0 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.5 ft, Moderate 4.0 ft, Major 5.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 11.3/11.8 0.8/ 1.3 0.9/ 1.4 3 None
30/03 AM 12.8/13.3 2.2/ 2.7 0.8/ 1.3 3 Minor
30/03 PM 10.9/11.4 0.4/ 0.9 0.6/ 1.1 1-2 None
31/04 AM 11.8/12.3 1.3/ 1.8 0.4/ 0.9 2-3 None
31/04 PM 10.2/10.7 -0.3/ 0.2 0.2/ 0.7 1-2 None
Chatham MA - East Coast
MLLW Categories - Minor 9.0 ft, Moderate 11.5 ft, Major 13.0 ft
MHHW Categories - Minor 1.3 ft, Moderate 3.8 ft, Major 5.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/04 PM 5.5/ 6.0 -2.2/-1.8 0.9/ 1.4 11 None
30/04 AM 6.5/ 7.0 -1.3/-0.8 0.8/ 1.3 8-9 None
30/04 PM 5.1/ 5.6 -2.7/-2.2 0.6/ 1.1 5-6 None
31/05 AM 5.7/ 6.2 -2.0/-1.5 0.2/ 0.8 4-5 None
31/05 PM 4.7/ 5.2 -3.1/-2.6 0.2/ 0.7 4 None
Sandwich Harbor
MLLW Categories - Minor 12.0 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 1.7 ft, Moderate 3.7 ft, Major 4.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 9.5/10.0 -0.9/-0.4 0.7/ 1.1 5-6 None
30/03 AM 10.8/11.3 0.5/ 1.0 0.6/ 1.1 4-5 None
30/03 PM 9.1/ 9.6 -1.3/-0.8 0.5/ 1.0 3-4 None
31/04 AM 9.8/10.3 -0.6/-0.1 0.2/ 0.7 3 None
31/04 PM 8.4/ 8.9 -2.0/-1.5 0.0/ 0.5 2 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
-------- --------- --------- --------- ------- --------
29/04 PM 3.6/ 4.1 0.0/ 0.5 0.7/ 1.1 5-6 None
30/04 AM 4.4/ 4.9 0.8/ 1.3 0.5/ 1.0 4-5 None
30/05 PM 3.2/ 3.7 -0.5/ 0.0 0.2/ 0.8 2-3 None
31/04 AM 3.7/ 4.2 0.2/ 0.7 0.2/ 0.7 3 None
31/05 PM 2.6/ 3.1 -1.1/-0.6 -0.2/ 0.2 2-3 None
&&
$$332
WHUS41 KBOX 291952
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
352 PM EDT Sat May 29 2021
MAZ007-015-016-019-022-024-300900-
/O.CAN.KBOX.CF.S.0007.210530T0600Z-210530T0900Z/
/O.NEW.KBOX.CF.Y.0007.210530T0600Z-210530T0900Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Nantucket MA-
352 PM EDT Sat May 29 2021
...COASTAL FLOOD ADVISORY IN EFFECT FROM 2 AM TO 5 AM EDT
SUNDAY...
* WHAT...Up to one foot of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways (2.8 to 13.2 feet Mean Lower Low Water).
* WHERE...Eastern Essex MA, Suffolk MA, Eastern Norfolk MA,
Eastern Plymouth MA, Barnstable MA and Nantucket MA Counties.
* WHEN...From 2 AM to 5 AM EDT Sunday.
* IMPACTS...Minor coastal flooding is expected along the North
Shore from Gloucester to Newburyport. Wave action will likely
cause some washover onto coastal roads around the time of high
tide. Minor coastal flooding begins on Easy Street in
Nantucket. Minor coastal flooding occurs along Morrissey
Boulevard in Boston.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
&&
&&
Time of high total tides are approximate to the nearest hour.
Merrimack River near Newburyport MA
MLLW Categories - Minor 11.0 ft, Moderate 12.0 ft, Major 13.5 ft
MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 4.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 9.4/ 9.9 -0.2/ 0.3 0.9/ 1.4 7-8 None
30/03 AM 10.8/11.3 1.3/ 1.8 0.9/ 1.4 7 Minor
30/04 PM 9.1/ 9.6 -0.5/ 0.0 0.8/ 1.3 8 None
31/04 AM 9.8/10.3 0.2/ 0.8 0.4/ 0.9 5-6 None
31/05 PM 8.4/ 8.9 -1.1/-0.7 0.2/ 0.8 3 None
01/05 AM 9.0/ 9.5 -0.6/-0.1 0.1/ 0.6 2 None
Gloucester Harbor
MLLW Categories - Minor 11.5 ft, Moderate 13.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.0 ft, Moderate 3.5 ft, Major 5.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 10.3/10.8 0.8/ 1.3 0.7/ 1.1 9 None
30/03 AM 11.6/12.1 2.1/ 2.6 0.7/ 1.1 7-8 Minor
30/03 PM 10.0/10.5 0.5/ 1.0 0.6/ 1.1 8-9 None
31/04 AM 10.6/11.1 1.1/ 1.6 0.2/ 0.8 6 None
31/04 PM 9.4/ 9.9 -0.2/ 0.3 0.2/ 0.8 3-4 None
01/05 AM 9.8/10.3 0.2/ 0.8 0.0/ 0.5 2 None
Revere
MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.6 ft, Moderate 4.6 ft, Major 6.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 11.0/11.5 1.1/ 1.6 1.1/ 1.6 2 None
30/03 AM 12.3/12.8 2.3/ 2.8 1.1/ 1.6 2 Minor
30/03 PM 10.6/11.1 0.7/ 1.1 1.0/ 1.5 2 None
31/04 AM 11.3/11.8 1.4/ 1.9 0.6/ 1.1 1 None
31/04 PM 9.9/10.4 0.0/ 0.5 0.6/ 1.1 1 None
01/05 AM 10.4/10.9 0.5/ 1.0 0.2/ 0.8 1 None
Boston Harbor
MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.4 ft, Moderate 4.4 ft, Major 5.9 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 11.1/11.6 1.0/ 1.5 1.0/ 1.5 2 None
30/03 AM 12.5/13.0 2.3/ 2.8 1.1/ 1.6 2 Minor
30/03 PM 10.9/11.4 0.8/ 1.3 1.1/ 1.6 2 None
31/04 AM 11.5/12.0 1.4/ 1.9 0.7/ 1.1 1-2 None
31/04 PM 10.1/10.6 0.0/ 0.5 0.6/ 1.1 2 None
01/05 AM 10.5/11.0 0.4/ 0.9 0.2/ 0.8 2 None
Scituate MA
MLLW Categories - Minor 11.5 ft, Moderate 13.5 ft, Major 15.5 ft
MHHW Categories - Minor 1.8 ft, Moderate 3.8 ft, Major 5.8 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
30/03 AM 11.9/12.4 2.2/ 2.7 0.9/ 1.4 7 Minor
30/03 PM 10.0/10.5 0.2/ 0.8 0.7/ 1.1 7-8 None
31/04 AM 11.0/11.5 1.3/ 1.8 0.5/ 1.0 5 None
31/04 PM 9.5/10.0 -0.2/ 0.2 0.4/ 0.9 3 None
01/05 AM 10.1/10.6 0.4/ 0.9 0.1/ 0.6 2 None
Chatham - South side
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
-------- --------- --------- --------- ------- --------
29/04 PM 4.6/ 5.1 0.1/ 0.6 0.8/ 1.3 4-5 None
30/04 AM 5.7/ 6.2 1.3/ 1.8 0.9/ 1.4 4 None
30/04 PM 4.4/ 4.9 -0.2/ 0.3 0.7/ 1.1 3 None
31/04 AM 5.2/ 5.7 0.8/ 1.3 0.7/ 1.1 3 None
31/05 PM 4.0/ 4.5 -0.6/-0.1 0.2/ 0.8 2 None
01/05 AM 4.5/ 5.0 0.0/ 0.5 0.2/ 0.7 1 None
Wings Neck
MLLW Categories - Minor 6.5 ft, Moderate 9.0 ft, Major 11.5 ft
MHHW Categories - Minor 2.1 ft, Moderate 4.6 ft, Major 7.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
30/12 AM 5.2/ 5.7 0.9/ 1.4 0.6/ 1.1 2-3 None
30/12 PM 4.4/ 4.9 0.0/ 0.5 0.2/ 0.8 2 None
31/12 AM 4.9/ 5.4 0.5/ 1.0 0.4/ 0.9 1 None
31/01 PM 4.0/ 4.5 -0.3/ 0.2 0.1/ 0.6 1-2 None
01/01 AM 4.2/ 4.7 -0.2/ 0.2 0.0/ 0.5 1 None
Provincetown Harbor
MLLW Categories - Minor 13.0 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.9 ft, Moderate 3.9 ft, Major 4.9 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 10.7/11.2 0.6/ 1.1 0.7/ 1.1 3 None
30/03 AM 12.2/12.7 2.1/ 2.6 0.8/ 1.3 3 None
30/04 PM 10.5/11.0 0.4/ 0.9 0.7/ 1.1 1-3 None
31/04 AM 11.3/11.8 1.2/ 1.7 0.4/ 0.9 2 None
31/05 PM 9.8/10.3 -0.3/ 0.2 0.2/ 0.8 2 None
01/05 AM 10.4/10.9 0.2/ 0.8 0.1/ 0.6 1 None
Buzzards Bay at 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
-------- --------- --------- --------- ------- --------
30/12 AM 3.5/ 4.0 1.5/ 2.0 0.6/ 1.1 3 None
30/12 PM 2.7/ 3.2 0.8/ 1.3 0.4/ 0.9 2-3 None
31/01 AM 3.1/ 3.6 1.1/ 1.6 0.4/ 0.9 1-2 None
31/01 PM 2.3/ 2.8 0.4/ 0.9 0.1/ 0.6 2 None
01/02 AM 2.2/ 2.7 0.2/ 0.8 -0.2/ 0.2 1 None
Dennis - Sesuit Harbor
MLLW Categories - Minor 13.0 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.5 ft, Moderate 4.0 ft, Major 5.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 11.0/11.5 0.5/ 1.0 0.6/ 1.1 3 None
30/03 AM 13.0/13.5 2.5/ 3.0 1.0/ 1.5 3 Minor
30/03 PM 11.0/11.5 0.5/ 1.0 0.7/ 1.1 1-2 None
31/04 AM 11.9/12.4 1.4/ 1.9 0.5/ 1.0 1-2 None
31/04 PM 10.5/11.0 0.0/ 0.5 0.5/ 1.0 2 None
01/05 AM 11.0/11.5 0.5/ 1.0 0.2/ 0.7 1 None
Chatham MA - East Coast
MLLW Categories - Minor 9.0 ft, Moderate 11.5 ft, Major 13.0 ft
MHHW Categories - Minor 1.3 ft, Moderate 3.8 ft, Major 5.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 5.5/ 6.0 -2.2/-1.8 0.9/ 1.4 10 None
30/04 AM 6.7/ 7.2 -1.1/-0.6 1.0/ 1.5 8 None
30/05 PM 5.2/ 5.7 -2.5/-2.0 0.8/ 1.3 5-7 None
31/05 AM 5.9/ 6.4 -1.9/-1.4 0.4/ 0.9 5-6 None
31/05 PM 4.7/ 5.2 -3.0/-2.5 0.2/ 0.8 3-4 None
01/06 AM 5.2/ 5.7 -2.5/-2.0 0.1/ 0.6 2 None
Sandwich Harbor
MLLW Categories - Minor 12.0 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 1.7 ft, Moderate 3.7 ft, Major 4.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/03 PM 9.7/10.2 -0.7/-0.2 0.9/ 1.4 5-6 None
30/03 AM 11.0/11.5 0.7/ 1.1 0.8/ 1.3 4-5 None
30/04 PM 9.3/ 9.8 -1.1/-0.6 0.8/ 1.3 3-4 None
31/04 AM 10.0/10.5 -0.3/ 0.2 0.4/ 0.9 2-3 None
31/04 PM 8.8/ 9.3 -1.6/-1.1 0.4/ 0.9 2 None
01/05 AM 9.2/ 9.7 -1.1/-0.7 0.1/ 0.6 1 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
-------- --------- --------- --------- ------- --------
29/04 PM 3.7/ 4.2 0.1/ 0.6 0.8/ 1.3 5 None
30/04 AM 4.9/ 5.4 1.3/ 1.8 1.0/ 1.5 4-5 Minor
30/04 PM 3.4/ 3.9 -0.2/ 0.2 0.6/ 1.1 2-3 None
31/04 AM 4.0/ 4.5 0.4/ 0.9 0.4/ 0.9 2-3 None
31/06 PM 3.0/ 3.5 -0.7/-0.2 0.1/ 0.6 2 None
01/05 AM 3.4/ 3.9 -0.2/ 0.2 0.0/ 0.5 1 None
&&
$$The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 3:47 PM EDT | Small Craft Advisory | BOX | 51 hr | |
| May 29, 3:52 PM EDT | Coastal Flood Advisory | BOX | Barnstable, Essex, Nantucket, Norfolk, Plymouth, Suffolk | 12 hr |
Nearby
Coastal Flood Statements in Massachusetts, 2021Every coastal flood statement in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.