Alert archive / Massachusetts / Coastal Flood Statements in 2018
Coastal Flood Statement 6, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this coastal flood statement at May 17, 2018, 3:59 PM EDT for 6 counties in Massachusetts. It took effect at May 19, 2018, 12:00 AM EDT. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- May 17, 2018, 3:59 PM EDT (19:59 UTC)
- In effect from
- May 19, 2018, 12:00 AM EDT
- Expired
- May 19, 2018, 3:43 AM EDT
- In force
- 4 hr
- 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 20:02 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
Chatham, MA (KCHH), launched 12:00Z, 8.0 hours before the alert went out and 71 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
- 513 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
272
WHUS41 KBOX 171959
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
359 PM EDT Thu May 17 2018
MAZ007-015-016-019-022-024-180400-
/O.NEW.KBOX.CF.S.0006.180519T0400Z-180519T0800Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Nantucket MA-
359 PM EDT Thu May 17 2018
...MINOR SPLASHOVER POSSIBLE DURING THE HIGH TIDE EARLY FRIDAY
MORNING...
* LOCATION...Low lying areas along the east coast of
Massachusetts.
* TIDAL DEPARTURE...Up to 0.5 feet.
* TIMING...Within an hour of high tide.
* COASTAL FLOOD IMPACTS...Pockets of minor splashover for typical
low lying roads prone to tidal flooding.
&&
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.
Newburyport
MLLW Categories - Minor 11.0 FT, Moderate 12.5 FT, Major 14.0 FT
MHHW Categories - Minor 1.5 FT, Moderate 3.0 FT, Major 4.5 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
17/02 PM 8.5/ 9.0 -1.1/-0.6 -0.2/ 0.2 1-2 None
18/02 AM 10.1/10.6 0.6/ 1.1 0.1/ 0.6 2-3 None
18/03 PM 8.7/ 9.2 -0.9/-0.4 0.1/ 0.6 4-5 None
19/03 AM 10.0/10.5 0.5/ 1.0 0.1/ 0.6 2 None
19/04 PM 8.4/ 8.9 -1.1/-0.7 -0.2/ 0.2 2 None
20/04 AM 9.5/10.0 0.0/ 0.5 -0.2/ 0.2 2 None
Gloucester Harbor
MLLW Categories - Minor 12.0 FT, Moderate 14.5 FT, Major 15.5 FT
MHHW Categories - Minor 2.5 FT, Moderate 5.0 FT, Major 6.0 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
17/02 PM 9.6/10.1 0.1/ 0.6 -0.2/ 0.2 2 None
18/02 AM 11.2/11.7 1.7/ 2.2 0.1/ 0.6 2-3 None
18/02 PM 10.2/10.7 0.7/ 1.1 0.4/ 0.9 5-6 None
19/03 AM 11.1/11.6 1.6/ 2.0 0.2/ 0.7 3 None
19/03 PM 9.9/10.4 0.4/ 0.9 0.2/ 0.8 3 None
20/04 AM 10.7/11.2 1.2/ 1.7 0.1/ 0.6 3 None
Boston Harbor
MLLW Categories - Minor 12.5 FT, Moderate 15.0 FT, Major 16.0 FT
MHHW Categories - Minor 2.4 FT, Moderate 4.9 FT, Major 5.9 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
17/02 PM 10.2/10.7 0.1/ 0.6 -0.2/ 0.2 1 None
18/02 AM 11.8/12.3 1.7/ 2.2 0.1/ 0.6 1-2 None
18/02 PM 10.4/10.9 0.2/ 0.8 0.1/ 0.6 2 None
19/03 AM 11.6/12.1 1.5/ 2.0 0.1/ 0.6 1 None
19/03 PM 9.9/10.4 -0.2/ 0.2 -0.2/ 0.2 1-2 None
20/04 AM 11.0/11.5 0.9/ 1.4 -0.2/ 0.2 1-2 None
Revere
MLLW Categories - Minor 12.5 FT, Moderate 15.0 FT, Major 16.5 FT
MHHW Categories - Minor 2.6 FT, Moderate 5.1 FT, Major 6.6 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
17/02 PM 10.1/10.6 0.2/ 0.7 -0.2/ 0.2 1 None
18/02 AM 11.8/12.3 1.9/ 2.3 0.2/ 0.7 1-2 None
18/02 PM 10.7/11.2 0.8/ 1.3 0.5/ 1.0 4-5 None
19/03 AM 11.6/12.1 1.7/ 2.2 0.2/ 0.7 2-3 None
19/03 PM 10.4/10.9 0.5/ 1.0 0.2/ 0.8 2 None
20/04 AM 11.2/11.7 1.3/ 1.8 0.1/ 0.6 2 None
Scituate
MLLW Categories - Minor 11.5 FT, Moderate 14.0 FT, Major 16.0 FT
MHHW Categories - Minor 1.8 FT, Moderate 4.3 FT, Major 6.3 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
17/02 PM 9.5/10.0 -0.2/ 0.2 -0.2/ 0.2 1 None
18/02 AM 11.1/11.6 1.4/ 1.9 0.1/ 0.6 1-2 None
18/02 PM 9.8/10.3 0.1/ 0.6 0.1/ 0.6 5-6 None
19/03 AM 11.1/11.6 1.4/ 1.9 0.1/ 0.6 3 None
19/03 PM 9.6/10.1 -0.2/ 0.3 0.0/ 0.5 2-3 None
20/04 AM 10.6/11.1 0.9/ 1.4 -0.2/ 0.2 3 None
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
-------- --------- --------- --------- ------- --------
17/02 PM 9.8/10.3 -0.6/-0.1 -0.2/ 0.2 1 None
18/02 AM 11.6/12.1 1.3/ 1.8 0.2/ 0.7 1-2 None
18/02 PM 10.5/11.0 0.2/ 0.7 0.6/ 1.1 2 None
19/03 AM 11.5/12.0 1.2/ 1.7 0.2/ 0.8 1 None
19/03 PM 10.1/10.6 -0.2/ 0.2 0.2/ 0.8 1 None
20/04 AM 10.9/11.4 0.6/ 1.1 0.0/ 0.5 2 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
-------- --------- --------- --------- ------- --------
17/02 PM 10.5/11.0 0.4/ 0.9 -0.2/ 0.2 1 None
18/02 AM 12.2/12.7 2.1/ 2.6 0.2/ 0.7 1-3 None
18/03 PM 11.0/11.5 0.9/ 1.4 0.4/ 0.9 1-4 None
19/03 AM 12.0/12.5 1.9/ 2.3 0.2/ 0.7 1 None
19/03 PM 10.6/11.1 0.5/ 1.0 0.2/ 0.7 3 None
20/04 AM 11.5/12.0 1.4/ 1.9 0.0/ 0.5 3 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
-------- --------- --------- --------- ------- --------
17/02 PM 5.2/ 5.7 -2.6/-2.1 -0.2/ 0.2 2 None
18/03 AM 6.8/ 7.3 -1.0/-0.5 0.2/ 0.7 2 None
18/03 PM 5.9/ 6.4 -1.9/-1.4 0.4/ 0.9 5-6 None
19/03 AM 6.9/ 7.4 -0.9/-0.4 0.2/ 0.8 4 None
19/04 PM 5.6/ 6.1 -2.2/-1.7 0.2/ 0.7 4 None
20/04 AM 6.5/ 7.0 -1.3/-0.8 0.0/ 0.5 4-5 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
-------- --------- --------- --------- ------- --------
17/03 PM 3.2/ 3.7 -1.3/-0.8 -0.2/ 0.2 1 None
18/03 AM 4.6/ 5.1 0.1/ 0.6 0.1/ 0.6 1 None
18/04 PM 3.9/ 4.4 -0.7/-0.2 0.4/ 0.9 3 None
19/03 AM 4.7/ 5.2 0.2/ 0.8 0.2/ 0.8 3 None
19/04 PM 3.9/ 4.4 -0.7/-0.2 0.4/ 0.9 2-3 None
20/04 AM 4.7/ 5.2 0.2/ 0.7 0.2/ 0.8 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
-------- --------- --------- --------- ------- --------
17/11 PM 2.8/ 3.4 0.9/ 1.4 -0.2/ 0.2 2 None
18/11 AM 2.2/ 2.7 0.2/ 0.8 -0.2/ 0.2 2-3 None
19/12 AM 3.1/ 3.6 1.1/ 1.6 0.2/ 0.7 2 None
19/12 PM 2.7/ 3.2 0.8/ 1.3 0.2/ 0.8 2 None
20/01 AM 3.1/ 3.6 1.1/ 1.6 0.2/ 0.8 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
-------- --------- --------- --------- ------- --------
17/11 PM 4.9/ 5.4 0.6/ 1.1 -0.2/ 0.2 1 None
18/11 AM 4.0/ 4.5 -0.2/ 0.2 -0.2/ 0.2 2 None
18/11 PM 5.0/ 5.5 0.7/ 1.1 0.1/ 0.6 1 None
19/12 PM 4.5/ 5.0 0.2/ 0.7 0.2/ 0.7 1 None
20/12 AM 5.2/ 5.7 0.9/ 1.4 0.5/ 1.0 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
-------- --------- --------- --------- ------- --------
17/03 PM 2.7/ 3.2 -0.9/-0.4 -0.2/ 0.2 2 None
18/03 AM 3.9/ 4.4 0.2/ 0.8 0.1/ 0.6 2 None
18/04 PM 3.2/ 3.7 -0.3/ 0.2 0.4/ 0.9 3-4 None
19/04 AM 4.0/ 4.5 0.5/ 1.0 0.2/ 0.8 3 None
19/05 PM 3.1/ 3.6 -0.6/-0.1 0.2/ 0.7 3 None
20/05 AM 3.6/ 4.1 0.0/ 0.5 -0.2/ 0.3 4-5 None
Nantucket East Coast - Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
17/03 PM 3.2/ 3.7 -1.0/-0.5 -0.2/ 0.2 3 None
18/02 AM 4.4/ 4.9 0.2/ 0.8 0.1/ 0.6 3 None
18/03 PM 3.9/ 4.4 -0.2/ 0.2 0.5/ 1.0 5 None
19/03 AM 4.7/ 5.2 0.6/ 1.1 0.4/ 0.9 4 None
19/04 PM 3.6/ 4.1 -0.6/-0.1 0.2/ 0.7 4 None
20/04 AM 4.2/ 4.7 0.1/ 0.6 0.0/ 0.5 5 None
Nantucket - Madaket Area Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
17/02 PM 2.2/ 2.7 0.8/ 1.3 -0.2/ 0.2 2-3 None
18/02 AM 2.8/ 3.4 1.5/ 2.0 0.1/ 0.6 3 None
18/03 PM 2.7/ 3.2 1.3/ 1.8 0.2/ 0.8 4 None
19/03 AM 3.2/ 3.7 1.8/ 2.2 0.4/ 0.9 3 None
19/04 PM 2.6/ 3.1 1.2/ 1.7 0.2/ 0.7 3 None
20/04 AM 2.7/ 3.2 1.4/ 1.9 0.1/ 0.6 4-5 None
&&
$$
For the latest updates, please visit our webpage at
www.weather.gov/boston
You can follow us on Facebook at
www.facebook.com/NWSBoston
You can follow us on Twitter at
@NWSBoston5 follow-up statements
889
WHUS41 KBOX 180229
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
1029 PM EDT Thu May 17 2018
MAZ007-015-016-019-022-024-180800-
/O.CON.KBOX.CF.S.0006.180519T0400Z-180519T0800Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Nantucket MA-
1029 PM EDT Thu May 17 2018
...MINOR SPLASHOVER POSSIBLE DURING THE HIGH TIDE EARLY FRIDAY
MORNING...
* LOCATION...Low-lying areas along the east coast of
Massachusetts.
* TIDAL DEPARTURE...Up to 0.5 feet AGL.
* TIMING...Within an hour of high tide.
* COASTAL FLOOD IMPACTS...Pockets of minor splashover for
typical low-lying roads prone to tidal flooding.
&&
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.
Newburyport
MLLW Categories - Minor 11.0 FT, Moderate 12.5 FT, Major 14.0 FT
MHHW Categories - Minor 1.5 FT, Moderate 3.0 FT, Major 4.5 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/02 AM 10.1/10.6 0.6/ 1.1 0.1/ 0.6 2-3 None
18/03 PM 8.7/ 9.2 -0.9/-0.4 0.1/ 0.6 4-5 None
19/03 AM 10.0/10.5 0.5/ 1.0 0.1/ 0.6 2 None
19/04 PM 8.4/ 8.9 -1.1/-0.7 -0.2/ 0.2 2 None
20/04 AM 9.5/10.0 0.0/ 0.5 -0.2/ 0.2 2 None
Gloucester Harbor
MLLW Categories - Minor 12.0 FT, Moderate 14.5 FT, Major 15.5 FT
MHHW Categories - Minor 2.5 FT, Moderate 5.0 FT, Major 6.0 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/02 AM 11.2/11.7 1.7/ 2.2 0.1/ 0.6 2-3 None
18/02 PM 10.2/10.7 0.7/ 1.1 0.4/ 0.9 5-6 None
19/03 AM 11.1/11.6 1.6/ 2.0 0.2/ 0.7 3 None
19/03 PM 9.9/10.4 0.4/ 0.9 0.2/ 0.8 3 None
20/04 AM 10.7/11.2 1.2/ 1.7 0.1/ 0.6 3 None
Boston Harbor
MLLW Categories - Minor 12.5 FT, Moderate 15.0 FT, Major 16.0 FT
MHHW Categories - Minor 2.4 FT, Moderate 4.9 FT, Major 5.9 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/02 AM 11.8/12.3 1.7/ 2.2 0.1/ 0.6 1-2 None
18/02 PM 10.4/10.9 0.2/ 0.8 0.1/ 0.6 2 None
19/03 AM 11.6/12.1 1.5/ 2.0 0.1/ 0.6 1 None
19/03 PM 9.9/10.4 -0.2/ 0.2 -0.2/ 0.2 1-2 None
20/04 AM 11.0/11.5 0.9/ 1.4 -0.2/ 0.2 1-2 None
Revere
MLLW Categories - Minor 12.5 FT, Moderate 15.0 FT, Major 16.5 FT
MHHW Categories - Minor 2.6 FT, Moderate 5.1 FT, Major 6.6 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/02 AM 11.8/12.3 1.9/ 2.3 0.2/ 0.7 1-2 None
18/02 PM 10.7/11.2 0.8/ 1.3 0.5/ 1.0 4-5 None
19/03 AM 11.6/12.1 1.7/ 2.2 0.2/ 0.7 2-3 None
19/03 PM 10.4/10.9 0.5/ 1.0 0.2/ 0.8 2 None
20/04 AM 11.2/11.7 1.3/ 1.8 0.1/ 0.6 2 None
Scituate
MLLW Categories - Minor 11.5 FT, Moderate 14.0 FT, Major 16.0 FT
MHHW Categories - Minor 1.8 FT, Moderate 4.3 FT, Major 6.3 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/02 AM 11.1/11.6 1.4/ 1.9 0.1/ 0.6 1-2 None
18/02 PM 9.8/10.3 0.1/ 0.6 0.1/ 0.6 5-6 None
19/03 AM 11.1/11.6 1.4/ 1.9 0.1/ 0.6 3 None
19/03 PM 9.6/10.1 -0.2/ 0.3 0.0/ 0.5 2-3 None
20/04 AM 10.6/11.1 0.9/ 1.4 -0.2/ 0.2 3 None
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
-------- --------- --------- --------- ------- --------
18/02 AM 11.6/12.1 1.3/ 1.8 0.2/ 0.7 1-2 None
18/02 PM 10.5/11.0 0.2/ 0.7 0.6/ 1.1 2 None
19/03 AM 11.5/12.0 1.2/ 1.7 0.2/ 0.8 1 None
19/03 PM 10.1/10.6 -0.2/ 0.2 0.2/ 0.8 1 None
20/04 AM 10.9/11.4 0.6/ 1.1 0.0/ 0.5 2 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
-------- --------- --------- --------- ------- --------
18/02 AM 12.2/12.7 2.1/ 2.6 0.2/ 0.7 1-3 None
18/03 PM 11.0/11.5 0.9/ 1.4 0.4/ 0.9 1-4 None
19/03 AM 12.0/12.5 1.9/ 2.3 0.2/ 0.7 1 None
19/03 PM 10.6/11.1 0.5/ 1.0 0.2/ 0.7 3 None
20/04 AM 11.5/12.0 1.4/ 1.9 0.0/ 0.5 3 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
-------- --------- --------- --------- ------- --------
18/03 AM 6.8/ 7.3 -1.0/-0.5 0.2/ 0.7 2 None
18/03 PM 5.9/ 6.4 -1.9/-1.4 0.4/ 0.9 5-6 None
19/03 AM 6.9/ 7.4 -0.9/-0.4 0.2/ 0.8 4 None
19/04 PM 5.6/ 6.1 -2.2/-1.7 0.2/ 0.7 4 None
20/04 AM 6.5/ 7.0 -1.3/-0.8 0.0/ 0.5 4-5 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
-------- --------- --------- --------- ------- --------
18/03 AM 4.6/ 5.1 0.1/ 0.6 0.1/ 0.6 1 None
18/04 PM 3.9/ 4.4 -0.7/-0.2 0.4/ 0.9 3 None
19/03 AM 4.7/ 5.2 0.2/ 0.8 0.2/ 0.8 3 None
19/04 PM 3.9/ 4.4 -0.7/-0.2 0.4/ 0.9 2-3 None
20/04 AM 4.7/ 5.2 0.2/ 0.7 0.2/ 0.8 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
-------- --------- --------- --------- ------- --------
17/11 PM 2.8/ 3.4 0.9/ 1.4 -0.2/ 0.2 2 None
18/11 AM 2.2/ 2.7 0.2/ 0.8 -0.2/ 0.2 2-3 None
19/12 AM 3.1/ 3.6 1.1/ 1.6 0.2/ 0.7 2 None
19/12 PM 2.7/ 3.2 0.8/ 1.3 0.2/ 0.8 2 None
20/01 AM 3.1/ 3.6 1.1/ 1.6 0.2/ 0.8 2-3 None
20/01 PM 2.2/ 2.7 0.2/ 0.7 -0.2/ 0.2 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
-------- --------- --------- --------- ------- --------
17/11 PM 4.9/ 5.4 0.6/ 1.1 -0.2/ 0.2 1 None
18/11 AM 4.0/ 4.5 -0.2/ 0.2 -0.2/ 0.2 2 None
18/11 PM 5.0/ 5.5 0.7/ 1.1 0.1/ 0.6 1 None
19/12 PM 4.5/ 5.0 0.2/ 0.7 0.2/ 0.7 1 None
20/12 AM 5.2/ 5.7 0.9/ 1.4 0.5/ 1.0 1 None
20/01 PM 4.0/ 4.5 -0.2/ 0.2 -0.2/ 0.3 1-2 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
-------- --------- --------- --------- ------- --------
17/04 PM 2.3/ 2.8 -1.3/-0.8 -0.2/ 0.2 2 None
18/03 AM 3.9/ 4.4 0.2/ 0.8 0.1/ 0.6 2 None
18/04 PM 3.2/ 3.7 -0.3/ 0.2 0.4/ 0.9 3-4 None
19/04 AM 4.0/ 4.5 0.5/ 1.0 0.2/ 0.8 3 None
19/05 PM 3.1/ 3.6 -0.6/-0.1 0.2/ 0.7 3 None
20/05 AM 3.6/ 4.1 0.0/ 0.5 -0.2/ 0.3 4-5 None
Nantucket East Coast - Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/02 AM 4.4/ 4.9 0.2/ 0.8 0.1/ 0.6 3 None
18/03 PM 3.9/ 4.4 -0.2/ 0.2 0.5/ 1.0 5 None
19/03 AM 4.7/ 5.2 0.6/ 1.1 0.4/ 0.9 4 None
19/04 PM 3.6/ 4.1 -0.6/-0.1 0.2/ 0.7 4 None
20/04 AM 4.2/ 4.7 0.1/ 0.6 0.0/ 0.5 5 None
Nantucket - Madaket Area Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/02 AM 2.8/ 3.4 1.5/ 2.0 0.1/ 0.6 3 None
18/03 PM 2.7/ 3.2 1.3/ 1.8 0.2/ 0.8 4 None
19/03 AM 3.2/ 3.7 1.8/ 2.2 0.4/ 0.9 3 None
19/04 PM 2.6/ 3.1 1.2/ 1.7 0.2/ 0.7 3 None
20/04 AM 2.7/ 3.2 1.4/ 1.9 0.1/ 0.6 4-5 None
&&
$$
For the latest updates, please visit our webpage at
www.weather.gov/boston
You can follow us on Facebook at
www.facebook.com/NWSBoston
You can follow us on Twitter at
@NWSBoston958
WHUS41 KBOX 181409
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
1009 AM EDT Fri May 18 2018
MAZ007-015-016-019-022-024-182215-
/O.CON.KBOX.CF.S.0006.180519T0400Z-180519T0800Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Nantucket MA-
1009 AM EDT Fri May 18 2018
......MINOR SPLASHOVER POSSIBLE DURING THE HIGH TIDE EARLY
SATURDAY MORNING...
* LOCATION...Low-lying areas along the east coast of
Massachusetts.
* TIDAL DEPARTURE...Up to 0.5 feet AGL.
* TIMING...Within an hour of high tide, generally between 2 and 4
AM.
* COASTAL FLOOD IMPACTS...Pockets of minor splashover for
typical low-lying roads prone to tidal flooding.
&&
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.
Newburyport
MLLW Categories - Minor 11.0 FT, Moderate 12.5 FT, Major 14.0 FT
MHHW Categories - Minor 1.5 FT, Moderate 3.0 FT, Major 4.5 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/04 AM 7.1/ 7.6 -2.5/-2.0 -0.2/ 0.2 3 None
18/03 PM 8.4/ 8.9 -1.1/-0.7 -0.2/ 0.2 4 None
19/03 AM 9.7/10.2 0.2/ 0.7 -0.2/ 0.2 2 None
19/04 PM 8.4/ 8.9 -1.1/-0.7 -0.2/ 0.2 2 None
20/04 AM 9.5/10.0 0.0/ 0.5 -0.2/ 0.2 3 None
20/05 PM 8.3/ 8.8 -1.3/-0.8 -0.2/ 0.2 2-3 None
Gloucester Harbor
MLLW Categories - Minor 12.0 FT, Moderate 14.5 FT, Major 15.5 FT
MHHW Categories - Minor 2.5 FT, Moderate 5.0 FT, Major 6.0 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/02 PM 9.9/10.4 0.4/ 0.9 0.1/ 0.6 4-5 None
19/03 AM 10.8/11.3 1.3/ 1.8 -0.2/ 0.3 3 None
19/03 PM 9.9/10.4 0.4/ 0.9 0.2/ 0.8 3 None
20/04 AM 10.7/11.2 1.2/ 1.7 0.1/ 0.6 3-4 None
20/04 PM 9.3/ 9.8 -0.2/ 0.2 -0.2/ 0.2 3-4 None
Boston Harbor
MLLW Categories - Minor 12.5 FT, Moderate 15.0 FT, Major 16.0 FT
MHHW Categories - Minor 2.4 FT, Moderate 4.9 FT, Major 5.9 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/02 PM 10.1/10.6 0.0/ 0.5 -0.2/ 0.2 2 None
19/03 AM 11.3/11.8 1.2/ 1.7 -0.2/ 0.2 1 None
19/03 PM 9.9/10.4 -0.2/ 0.2 -0.2/ 0.2 1 None
20/04 AM 11.0/11.5 0.9/ 1.4 -0.2/ 0.2 1-2 None
20/04 PM 9.7/10.2 -0.5/ 0.0 -0.2/ 0.2 1-2 None
Revere
MLLW Categories - Minor 12.5 FT, Moderate 15.0 FT, Major 16.5 FT
MHHW Categories - Minor 2.6 FT, Moderate 5.1 FT, Major 6.6 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/02 PM 10.4/10.9 0.5/ 1.0 0.2/ 0.7 4 None
19/03 AM 11.3/11.8 1.4/ 1.9 -0.2/ 0.3 2 None
19/03 PM 10.4/10.9 0.5/ 1.0 0.2/ 0.8 2 None
20/04 AM 11.2/11.7 1.3/ 1.8 0.1/ 0.6 3 None
20/04 PM 9.7/10.2 -0.2/ 0.2 -0.2/ 0.2 2 None
Scituate
MLLW Categories - Minor 11.5 FT, Moderate 14.0 FT, Major 16.0 FT
MHHW Categories - Minor 1.8 FT, Moderate 4.3 FT, Major 6.3 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/02 PM 9.5/10.0 -0.2/ 0.2 -0.2/ 0.2 4-5 None
19/03 AM 10.8/11.3 1.1/ 1.6 -0.2/ 0.2 3 None
19/03 PM 9.6/10.1 -0.2/ 0.3 0.0/ 0.5 2-3 None
20/04 AM 10.6/11.1 0.9/ 1.4 -0.2/ 0.2 3 None
20/04 PM 9.3/ 9.8 -0.5/ 0.0 -0.2/ 0.2 2 None
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
-------- --------- --------- --------- ------- --------
18/02 PM 10.2/10.7 -0.2/ 0.3 0.2/ 0.8 2-3 None
19/03 AM 11.2/11.7 0.9/ 1.4 0.0/ 0.5 1 None
19/03 PM 10.1/10.6 -0.2/ 0.2 0.2/ 0.8 1 None
20/04 AM 10.9/11.4 0.6/ 1.1 0.0/ 0.5 2 None
20/04 PM 9.5/10.0 -0.9/-0.4 -0.2/ 0.2 1-2 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
-------- --------- --------- --------- ------- --------
18/04 AM 8.5/ 9.0 -1.7/-1.2 -0.2/ 0.3 3-4 None
18/03 PM 10.7/11.2 0.6/ 1.1 0.1/ 0.6 1-3 None
19/03 AM 11.7/12.2 1.6/ 2.0 -0.2/ 0.3 1 None
19/03 PM 10.6/11.1 0.5/ 1.0 0.2/ 0.7 2 None
20/04 AM 11.5/12.0 1.4/ 1.9 0.0/ 0.5 2-3 None
20/04 PM 10.0/10.5 -0.2/ 0.3 -0.2/ 0.2 1-3 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
-------- --------- --------- --------- ------- --------
18/04 AM 5.7/ 6.2 -2.0/-1.6 -0.2/ 0.3 2 None
18/03 PM 5.6/ 6.1 -2.2/-1.7 0.1/ 0.6 5 None
19/03 AM 6.6/ 7.1 -1.1/-0.7 0.0/ 0.5 4 None
19/04 PM 5.6/ 6.1 -2.2/-1.7 0.2/ 0.7 4 None
20/04 AM 6.5/ 7.0 -1.3/-0.8 0.0/ 0.5 4-5 None
20/05 PM 5.2/ 5.7 -2.6/-2.1 -0.2/ 0.2 4-5 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
-------- --------- --------- --------- ------- --------
18/04 AM 3.7/ 4.2 -0.8/-0.2 -0.2/ 0.2 1-2 None
18/04 PM 3.6/ 4.1 -1.0/-0.5 0.1/ 0.6 2-3 None
19/03 AM 4.5/ 5.0 0.0/ 0.5 0.0/ 0.5 2 None
19/04 PM 3.9/ 4.4 -0.7/-0.2 0.4/ 0.9 2 None
20/04 AM 4.7/ 5.2 0.2/ 0.7 0.2/ 0.8 3 None
20/06 PM 3.2/ 3.7 -1.3/-0.8 -0.2/ 0.2 2-3 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
-------- --------- --------- --------- ------- --------
18/11 AM 2.2/ 2.7 0.2/ 0.8 -0.2/ 0.2 2-3 None
19/12 AM 3.1/ 3.6 1.1/ 1.6 0.2/ 0.7 2 None
19/12 PM 2.7/ 3.2 0.8/ 1.3 0.2/ 0.8 2 None
20/01 AM 3.1/ 3.6 1.1/ 1.6 0.2/ 0.8 1-2 None
20/01 PM 2.2/ 2.7 0.2/ 0.7 -0.2/ 0.2 2 None
21/02 AM 2.3/ 2.8 0.4/ 0.9 -0.2/ 0.2 1 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
-------- --------- --------- --------- ------- --------
18/11 AM 4.0/ 4.5 -0.2/ 0.2 -0.2/ 0.2 2-3 None
18/11 PM 5.0/ 5.5 0.7/ 1.1 0.1/ 0.6 1 None
19/12 PM 4.5/ 5.0 0.2/ 0.7 0.2/ 0.7 1 None
20/12 AM 5.2/ 5.7 0.9/ 1.4 0.5/ 1.0 1 None
20/01 PM 4.0/ 4.5 -0.2/ 0.2 -0.2/ 0.3 2 None
21/01 AM 4.2/ 4.7 0.0/ 0.5 -0.2/ 0.2 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
-------- --------- --------- --------- ------- --------
18/04 AM 3.2/ 3.7 -0.5/ 0.0 -0.2/ 0.2 2 None
18/04 PM 3.0/ 3.5 -0.7/-0.2 0.1/ 0.6 3-4 None
19/04 AM 3.7/ 4.2 0.2/ 0.7 0.0/ 0.5 3 None
19/05 PM 3.1/ 3.6 -0.6/-0.1 0.2/ 0.7 3 None
20/05 AM 3.6/ 4.1 0.0/ 0.5 -0.2/ 0.3 2-3 None
20/06 PM 2.7/ 3.2 -1.0/-0.5 -0.2/ 0.2 2-3 None
Nantucket East Coast - Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/04 AM 3.6/ 4.1 -0.6/-0.1 -0.2/ 0.3 3 None
18/03 PM 3.6/ 4.1 -0.6/-0.1 0.2/ 0.7 4-5 None
19/03 AM 4.4/ 4.9 0.2/ 0.8 0.1/ 0.6 4 None
19/04 PM 3.6/ 4.1 -0.6/-0.1 0.2/ 0.7 4 None
20/04 AM 4.2/ 4.7 0.1/ 0.6 0.0/ 0.5 4 None
20/05 PM 3.2/ 3.7 -1.0/-0.5 -0.2/ 0.2 4-5 None
Nantucket - Madaket Area Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/04 AM 2.1/ 2.6 0.7/ 1.1 -0.2/ 0.2 3 None
18/03 PM 2.3/ 2.8 1.0/ 1.5 0.0/ 0.5 4 None
19/03 AM 2.8/ 3.4 1.5/ 2.0 0.1/ 0.6 3 None
19/04 PM 2.6/ 3.1 1.2/ 1.7 0.2/ 0.7 3 None
20/04 AM 2.7/ 3.2 1.4/ 1.9 0.1/ 0.6 4-6 None
20/05 PM 2.1/ 2.6 0.7/ 1.1 -0.2/ 0.2 5-6 None
&&
$$
For the latest updates, please visit our webpage at
www.weather.gov/boston
You can follow us on Facebook at
www.facebook.com/NWSBoston
You can follow us on Twitter at
@NWSBoston684
WHUS41 KBOX 181951
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
351 PM EDT Fri May 18 2018
MAZ007-015-016-019-022-024-190400-
/O.CON.KBOX.CF.S.0006.180519T0400Z-180519T0800Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Nantucket MA-
351 PM EDT Fri May 18 2018
...MINOR SPLASHOVER POSSIBLE DURING THE HIGH TIDE EARLY
SATURDAY MORNING...
* LOCATION...Low-lying areas along the east coast of
Massachusetts.
* TIDAL DEPARTURE...Up to 0.5 feet AGL.
* TIMING...Within an hour of high tide, generally between 2 and
4 AM.
* COASTAL FLOOD IMPACTS...Pockets of minor splashover for typical
low-lying roads prone to tidal flooding.
&&
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.
Newburyport
MLLW Categories - Minor 11.0 FT, Moderate 12.5 FT, Major 14.0 FT
MHHW Categories - Minor 1.5 FT, Moderate 3.0 FT, Major 4.5 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
19/03 AM 9.7/10.2 0.2/ 0.7 -0.2/ 0.2 2 None
19/04 PM 8.4/ 8.9 -1.1/-0.7 -0.2/ 0.2 2 None
20/04 AM 9.5/10.0 0.0/ 0.5 -0.2/ 0.2 3 None
20/05 PM 8.3/ 8.8 -1.3/-0.8 -0.2/ 0.2 2-3 None
Gloucester Harbor
MLLW Categories - Minor 12.0 FT, Moderate 14.5 FT, Major 15.5 FT
MHHW Categories - Minor 2.5 FT, Moderate 5.0 FT, Major 6.0 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
19/03 AM 10.8/11.3 1.3/ 1.8 -0.2/ 0.3 3 None
19/03 PM 9.9/10.4 0.4/ 0.9 0.2/ 0.8 3 None
20/04 AM 10.7/11.2 1.2/ 1.7 0.1/ 0.6 3-4 None
20/04 PM 9.3/ 9.8 -0.2/ 0.2 -0.2/ 0.2 3-4 None
Boston Harbor
MLLW Categories - Minor 12.5 FT, Moderate 15.0 FT, Major 16.0 FT
MHHW Categories - Minor 2.4 FT, Moderate 4.9 FT, Major 5.9 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
19/03 AM 11.3/11.8 1.2/ 1.7 -0.2/ 0.2 1 None
19/03 PM 9.9/10.4 -0.2/ 0.2 -0.2/ 0.2 1 None
20/04 AM 11.0/11.5 0.9/ 1.4 -0.2/ 0.2 1-2 None
20/04 PM 9.7/10.2 -0.5/ 0.0 -0.2/ 0.2 1-2 None
Revere
MLLW Categories - Minor 12.5 FT, Moderate 15.0 FT, Major 16.5 FT
MHHW Categories - Minor 2.6 FT, Moderate 5.1 FT, Major 6.6 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
19/03 AM 11.3/11.8 1.4/ 1.9 -0.2/ 0.3 2 None
19/03 PM 10.4/10.9 0.5/ 1.0 0.2/ 0.8 2 None
20/04 AM 11.2/11.7 1.3/ 1.8 0.1/ 0.6 3 None
20/04 PM 9.7/10.2 -0.2/ 0.2 -0.2/ 0.2 2 None
Scituate
MLLW Categories - Minor 11.5 FT, Moderate 14.0 FT, Major 16.0 FT
MHHW Categories - Minor 1.8 FT, Moderate 4.3 FT, Major 6.3 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
19/03 AM 10.8/11.3 1.1/ 1.6 -0.2/ 0.2 3 None
19/03 PM 9.6/10.1 -0.2/ 0.3 0.0/ 0.5 2-3 None
20/04 AM 10.6/11.1 0.9/ 1.4 -0.2/ 0.2 3 None
20/04 PM 9.3/ 9.8 -0.5/ 0.0 -0.2/ 0.2 2 None
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
-------- --------- --------- --------- ------- --------
19/03 AM 11.2/11.7 0.9/ 1.4 0.0/ 0.5 1 None
19/03 PM 10.1/10.6 -0.2/ 0.2 0.2/ 0.8 1 None
20/04 AM 10.9/11.4 0.6/ 1.1 0.0/ 0.5 2 None
20/04 PM 9.5/10.0 -0.9/-0.4 -0.2/ 0.2 1-2 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
-------- --------- --------- --------- ------- --------
19/03 AM 11.7/12.2 1.6/ 2.0 -0.2/ 0.3 1 None
19/03 PM 10.6/11.1 0.5/ 1.0 0.2/ 0.7 2 None
20/04 AM 11.5/12.0 1.4/ 1.9 0.0/ 0.5 2-3 None
20/04 PM 10.0/10.5 -0.2/ 0.3 -0.2/ 0.2 1-3 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
-------- --------- --------- --------- ------- --------
19/03 AM 6.6/ 7.1 -1.1/-0.7 0.0/ 0.5 4 None
19/04 PM 5.6/ 6.1 -2.2/-1.7 0.2/ 0.7 4 None
20/04 AM 6.5/ 7.0 -1.3/-0.8 0.0/ 0.5 4-5 None
20/05 PM 5.2/ 5.7 -2.6/-2.1 -0.2/ 0.2 4-5 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
-------- --------- --------- --------- ------- --------
19/03 AM 4.5/ 5.0 0.0/ 0.5 0.0/ 0.5 2 None
19/04 PM 3.9/ 4.4 -0.7/-0.2 0.4/ 0.9 2 None
20/04 AM 4.7/ 5.2 0.2/ 0.7 0.2/ 0.8 3 None
20/06 PM 3.2/ 3.7 -1.3/-0.8 -0.2/ 0.2 2-3 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
-------- --------- --------- --------- ------- --------
19/04 AM 3.7/ 4.2 0.2/ 0.7 0.0/ 0.5 3 None
19/05 PM 3.1/ 3.6 -0.6/-0.1 0.2/ 0.7 3 None
20/05 AM 3.6/ 4.1 0.0/ 0.5 -0.2/ 0.3 2-3 None
20/06 PM 2.7/ 3.2 -1.0/-0.5 -0.2/ 0.2 2-3 None
Nantucket East Coast - Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
19/03 AM 4.4/ 4.9 0.2/ 0.8 0.1/ 0.6 4 None
19/04 PM 3.6/ 4.1 -0.6/-0.1 0.2/ 0.7 4 None
20/04 AM 4.2/ 4.7 0.1/ 0.6 0.0/ 0.5 4 None
20/05 PM 3.2/ 3.7 -1.0/-0.5 -0.2/ 0.2 4-5 None
Nantucket - Madaket Area Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
19/03 AM 2.8/ 3.4 1.5/ 2.0 0.1/ 0.6 3 None
19/04 PM 2.6/ 3.1 1.2/ 1.7 0.2/ 0.7 3 None
20/04 AM 2.7/ 3.2 1.4/ 1.9 0.1/ 0.6 4-6 None
20/05 PM 2.1/ 2.6 0.7/ 1.1 -0.2/ 0.2 5-6 None
&&
$$
For the latest updates, please visit our webpage at
www.weather.gov/boston
You can follow us on Facebook at
www.facebook.com/NWSBoston
You can follow us on Twitter at
@NWSBoston260
WHUS41 KBOX 190120
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
920 PM EDT Fri May 18 2018
MAZ007-015-016-019-022-024-190800-
/O.CON.KBOX.CF.S.0006.180519T0400Z-180519T0800Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Nantucket MA-
920 PM EDT Fri May 18 2018
* LOCATION...Low-lying areas along the east coast of
Massachusetts.
* TIDAL DEPARTURE...Up to 0.5 feet AGL.
* TIMING...Within an hour of high tide, generally between 2 and
4 AM.
* COASTAL FLOOD IMPACTS...Pockets of minor splashover for
typical low-lying roads prone to tidal flooding.
&&
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.
Newburyport
MLLW Categories - Minor 11.0 FT, Moderate 12.5 FT, Major 14.0 FT
MHHW Categories - Minor 1.5 FT, Moderate 3.0 FT, Major 4.5 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/04 PM 7.2/ 7.7 -2.3/-1.9 -0.2/ 0.2 3-4 None
19/03 AM 9.7/10.2 0.2/ 0.7 -0.2/ 0.2 2 None
19/04 PM 8.4/ 8.9 -1.1/-0.7 -0.2/ 0.2 2 None
20/04 AM 9.5/10.0 0.0/ 0.5 -0.2/ 0.2 3 None
20/05 PM 8.3/ 8.8 -1.3/-0.8 -0.2/ 0.2 2-3 None
21/05 AM 9.2/ 9.7 -0.3/ 0.2 -0.2/ 0.2 2 None
Gloucester Harbor
MLLW Categories - Minor 12.0 FT, Moderate 14.5 FT, Major 15.5 FT
MHHW Categories - Minor 2.5 FT, Moderate 5.0 FT, Major 6.0 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/04 PM 8.2/ 8.7 -1.4/-0.9 0.1/ 0.6 4 None
19/03 AM 10.8/11.3 1.3/ 1.8 -0.2/ 0.3 3 None
19/03 PM 9.9/10.4 0.4/ 0.9 0.2/ 0.8 3 None
20/04 AM 10.7/11.2 1.2/ 1.7 0.1/ 0.6 3-4 None
20/04 PM 9.3/ 9.8 -0.2/ 0.2 -0.2/ 0.2 3-4 None
21/05 AM 10.1/10.6 0.6/ 1.1 -0.2/ 0.2 2 None
Boston Harbor
MLLW Categories - Minor 12.5 FT, Moderate 15.0 FT, Major 16.0 FT
MHHW Categories - Minor 2.4 FT, Moderate 4.9 FT, Major 5.9 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/04 PM 8.5/ 9.0 -1.7/-1.2 -0.2/ 0.2 2 None
19/03 AM 11.3/11.8 1.2/ 1.7 -0.2/ 0.2 1 None
19/03 PM 9.9/10.4 -0.2/ 0.2 -0.2/ 0.2 1 None
20/04 AM 11.0/11.5 0.9/ 1.4 -0.2/ 0.2 1-2 None
20/04 PM 9.7/10.2 -0.5/ 0.0 -0.2/ 0.2 1-2 None
21/05 AM 10.6/11.1 0.5/ 1.0 -0.2/ 0.2 1 None
Revere
MLLW Categories - Minor 12.5 FT, Moderate 15.0 FT, Major 16.5 FT
MHHW Categories - Minor 2.6 FT, Moderate 5.1 FT, Major 6.6 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/04 PM 8.6/ 9.1 -1.4/-0.9 0.1/ 0.6 3-4 None
19/03 AM 11.3/11.8 1.4/ 1.9 -0.2/ 0.3 2 None
19/03 PM 10.4/10.9 0.5/ 1.0 0.2/ 0.8 2 None
20/04 AM 11.2/11.7 1.3/ 1.8 0.1/ 0.6 3 None
20/04 PM 9.7/10.2 -0.2/ 0.2 -0.2/ 0.2 2 None
21/05 AM 10.5/11.0 0.6/ 1.1 -0.2/ 0.2 1-2 None
Scituate
MLLW Categories - Minor 11.5 FT, Moderate 14.0 FT, Major 16.0 FT
MHHW Categories - Minor 1.8 FT, Moderate 4.3 FT, Major 6.3 FT
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/04 PM 7.8/ 8.3 -2.0/-1.5 -0.2/ 0.2 4 None
19/03 AM 10.8/11.3 1.1/ 1.6 -0.2/ 0.2 3 None
19/03 PM 9.6/10.1 -0.2/ 0.3 0.0/ 0.5 2-3 None
20/04 AM 10.6/11.1 0.9/ 1.4 -0.2/ 0.2 3 None
20/04 PM 9.3/ 9.8 -0.5/ 0.0 -0.2/ 0.2 2 None
21/05 AM 10.2/10.7 0.5/ 1.0 -0.2/ 0.2 1-2 None
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
-------- --------- --------- --------- ------- --------
18/04 PM 8.5/ 9.0 -1.9/-1.4 0.2/ 0.7 2 None
19/03 AM 11.2/11.7 0.9/ 1.4 0.0/ 0.5 1 None
19/03 PM 10.1/10.6 -0.2/ 0.2 0.2/ 0.8 1 None
20/04 AM 10.9/11.4 0.6/ 1.1 0.0/ 0.5 2 None
20/04 PM 9.5/10.0 -0.9/-0.4 -0.2/ 0.2 1-2 None
21/05 AM 10.3/10.8 0.0/ 0.5 -0.2/ 0.2 1 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
-------- --------- --------- --------- ------- --------
18/04 PM 9.1/ 9.6 -1.1/-0.6 0.1/ 0.6 1 None
19/03 AM 11.7/12.2 1.6/ 2.0 -0.2/ 0.3 1 None
19/03 PM 10.6/11.1 0.5/ 1.0 0.2/ 0.7 2 None
20/04 AM 11.5/12.0 1.4/ 1.9 0.0/ 0.5 2-3 None
20/04 PM 10.0/10.5 -0.2/ 0.3 -0.2/ 0.2 1-3 None
21/05 AM 10.9/11.4 0.8/ 1.3 -0.2/ 0.2 1 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
-------- --------- --------- --------- ------- --------
18/04 PM 5.4/ 5.9 -2.3/-1.9 0.1/ 0.6 5 None
19/03 AM 6.6/ 7.1 -1.1/-0.7 0.0/ 0.5 4 None
19/04 PM 5.6/ 6.1 -2.2/-1.7 0.2/ 0.7 4 None
20/04 AM 6.5/ 7.0 -1.3/-0.8 0.0/ 0.5 4-5 None
20/05 PM 5.2/ 5.7 -2.6/-2.1 -0.2/ 0.2 4-5 None
21/05 AM 6.1/ 6.6 -1.7/-1.2 -0.2/ 0.2 2-3 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
-------- --------- --------- --------- ------- --------
18/04 PM 3.6/ 4.1 -1.0/-0.5 0.1/ 0.6 2 None
19/03 AM 4.5/ 5.0 0.0/ 0.5 0.0/ 0.5 2 None
19/04 PM 3.9/ 4.4 -0.7/-0.2 0.4/ 0.9 2 None
20/04 AM 4.7/ 5.2 0.2/ 0.7 0.2/ 0.8 3 None
20/06 PM 3.2/ 3.7 -1.3/-0.8 -0.2/ 0.2 2-3 None
21/06 AM 4.0/ 4.5 -0.6/-0.1 -0.2/ 0.2 1 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
-------- --------- --------- --------- ------- --------
19/12 AM 3.1/ 3.6 1.1/ 1.6 0.2/ 0.7 2 None
19/12 PM 2.7/ 3.2 0.8/ 1.3 0.2/ 0.8 2 None
20/01 AM 3.1/ 3.6 1.1/ 1.6 0.2/ 0.8 1-2 None
20/01 PM 2.2/ 2.7 0.2/ 0.7 -0.2/ 0.2 2 None
21/02 AM 2.3/ 2.8 0.4/ 0.9 -0.2/ 0.2 1 None
21/02 PM 2.2/ 2.7 0.2/ 0.7 -0.2/ 0.2 1 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
-------- --------- --------- --------- ------- --------
18/11 PM 5.0/ 5.5 0.7/ 1.1 0.1/ 0.6 1 None
19/12 PM 4.5/ 5.0 0.2/ 0.7 0.2/ 0.7 1 None
20/12 AM 5.2/ 5.7 0.9/ 1.4 0.5/ 1.0 1 None
20/01 PM 4.0/ 4.5 -0.2/ 0.2 -0.2/ 0.3 2 None
21/01 AM 4.2/ 4.7 0.0/ 0.5 -0.2/ 0.2 1 None
21/02 PM 4.0/ 4.5 -0.3/ 0.2 -0.2/ 0.2 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
-------- --------- --------- --------- ------- --------
18/04 PM 3.0/ 3.5 -0.7/-0.2 0.1/ 0.6 3 None
19/04 AM 3.7/ 4.2 0.2/ 0.7 0.0/ 0.5 3 None
19/05 PM 3.1/ 3.6 -0.6/-0.1 0.2/ 0.7 3 None
20/05 AM 3.6/ 4.1 0.0/ 0.5 -0.2/ 0.3 2-3 None
20/06 PM 2.7/ 3.2 -1.0/-0.5 -0.2/ 0.2 2-3 None
21/06 AM 3.4/ 3.9 -0.2/ 0.2 -0.2/ 0.2 1 None
Nantucket East Coast - Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/04 PM 3.5/ 4.0 -0.7/-0.2 0.2/ 0.7 5 None
19/03 AM 4.4/ 4.9 0.2/ 0.8 0.1/ 0.6 4 None
19/04 PM 3.6/ 4.1 -0.6/-0.1 0.2/ 0.7 4 None
20/04 AM 4.2/ 4.7 0.1/ 0.6 0.0/ 0.5 4 None
20/05 PM 3.2/ 3.7 -1.0/-0.5 -0.2/ 0.2 4-5 None
21/05 AM 3.7/ 4.2 -0.3/ 0.2 -0.2/ 0.2 2-3 None
Nantucket - Madaket Area Erosion Impacts
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
18/04 PM 2.2/ 2.7 0.8/ 1.3 0.0/ 0.5 3-4 None
19/03 AM 2.8/ 3.4 1.5/ 2.0 0.1/ 0.6 3 None
19/04 PM 2.6/ 3.1 1.2/ 1.7 0.2/ 0.7 3 None
20/04 AM 2.7/ 3.2 1.4/ 1.9 0.1/ 0.6 4-6 None
20/05 PM 2.1/ 2.6 0.7/ 1.1 -0.2/ 0.2 5-6 None
21/05 AM 2.3/ 2.8 1.0/ 1.5 -0.2/ 0.2 4 None
&&
$$
For the latest updates, please visit our webpage at
www.weather.gov/boston
You can follow us on Facebook at
www.facebook.com/NWSBoston
You can follow us on Twitter at
@NWSBoston850 WHUS41 KBOX 190743 CFWBOX Coastal Hazard Message National Weather Service Boston/Norton MA 343 AM EDT Sat May 19 2018 MAZ007-015-016-019-022-024-190845- /O.CAN.KBOX.CF.S.0006.000000T0000Z-180519T0800Z/ Eastern Essex MA-Suffolk MA-Eastern Norfolk MA- Eastern Plymouth MA-Barnstable MA-Nantucket MA- 343 AM EDT Sat May 19 2018 The time of early morning high tide has passed. There is no longer a risk for minor coastal flooding. $$ For the latest updates, please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
What forecasters said that day
The local office's own words before this coastal flood statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boston/Norton, MA wrote its last area forecast discussion before this coastal flood statement went out at May 17, 3:47 PM EDT, 12 minutes earlier.
Area forecast discussion, May 17, 3:47 PM EDT, 12 minutes before
Area Forecast Discussion
National Weather Service Boston/Norton MA
347 PM EDT Thu May 17 2018
.SYNOPSIS...
A weak cold front will move south across the region tonight
High pressure builds to the north Friday bringing dry but
cooler weather with northeast flow. Widespread rainfall,
locally heavy, on Saturday, followed by warmer and drier
weather Sunday and Monday although hit or miss
showers and thunderstorms possible Sunday. Unsettled conditions
may return Tuesday/Wednesday.
&&
.NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
Light rain is exiting the Islands, otherwise mainly dry weather
into this evening. However, cold front will be sweeping south
across SNE this evening. Ahead of the front, axis of somewhat
higher theta-e air and steep low level lapse rates move into
the interior. This may lead to a brief shower or two developing
in northern MA and moving SE across eastern MA this evening.
Otherwise, expect a dry night with areas of low clouds and fog
along the south coast which may spread northward across portions
of RI and SE MA tonight. Increasing NE flow developing late
tonight.
&&
.SHORT TERM /6 AM FRIDAY MORNING THROUGH FRIDAY NIGHT/...
Friday...
High pressure builds to the north and east which will advect
drier air from the north into SNE. Dry weather will continue
but NE flow and lingering low level moisture will result in
lots of clouds, especially south of the Pike with a bit more
sunshine to the north. Gusty NE flow will bring cooler temps in
the mid 50s to low/mid 60s, coolest along the coast where winds
will gust to 20-30 mph at times.
Friday night...
Old frontal boundary to the south will begin to push back north
toward SNE with deeper moisture slowly pushing into the region
overnight from the SW. Model trends are slower with onset of
overrunning rain as drier air hangs on longer. Rain should begin
to move in from SW to NE well after midnight, reaching NE MA
Sat morning.
&&
.LONG TERM /SATURDAY THROUGH THURSDAY/...
*/ Highlights...
- Moderate to heavy rain Saturday
- Showers, maybe a shot at storms early to midday Sunday
- Potential midweek wet-weather
*/ Overview...
It's Spring. Persistent Baffin Bay low neighbored by the beginnings
of a Bermuda high. Meanwhile upstream, Aleutian low promoting NW N
America ridge, often SW CONUS cutoff lows. With Aleutian low death,
pattern snaps, ejects E, promoting a S-dip of N-stream energy round
the Baffin Bay low. Cool air pushed SE over the NE CONUS, shower
chances, chilly. However, the pattern can come together promoting
heavy rain / convective elements when any present SW CONUS cutoff
low pushes E as well, drawing N/E warmer air and/or tropical energy
with aiding Bermuda high, as was the case May 15th with a line of
severe weather, and as is the case this weekend with a heavy rain
threat. Ebb and flow otherwise, periods of active weather, with
persistent NW flow throughout in Baffin Bay low vicinity wobbles
against the Bermuda high. Will hit on targets of opportunity below.
*/ Discussion...
Saturday...
Moderate to heavy rain. Ejecting E Pacific-energy / SW CONUS low, as
N-stream vortmax dips S round Baffin Bay low. Draw N +2-3 standard
deviation precipitable water and specific humidity, clash of rich,
deep column moisture pressed by confluent low-level jet beneath H3
diffluent motions. Stronger low-mid level frontogenesis along warm
front appears focused over E Great Lakes ahead of H85 parent low,
lifting over Michigan into S Canada perhaps keeping us out of worst
threat. However decent isentropic upslope along 290-310K surfaces /
warm front, can't rule out a decent slug of rain. Precipitable water
upwards of 2-inches, deep column moisture up to H3-4, freezing level
heights up around 14 kft with decent lift / ascent apparent, warm
rain processes possible. Fairly soaked already. However, RFC FFG
guidance roughly 2.5 to 3.5 inches for both 3- to 6-hour periods,
respectively. With fast 0-6 / 0-10 km flow, non-training, have low
confidence in widespread flood threats. Perhaps isolated urban /
poor-drainage issues. Will note in hazardous weather outlook. Per
tropical connection, isentropic motions, heaviest rains focus N/W
likely aided by S-facing slopes of high terrain per orographic
forcing of +2-3 standard deviation S low-level jet.
Low clouds and/or fog along with breezy S/SW winds likely to impact
S-coastal New England through this event. Higher dewpoint air over
still cool waters, definite potential for dense fog. Saturday into
Saturday night potentially continuing into Sunday morning with non-
diurnal temperature trend.
Sunday...
Late morning thunderstorms? Brief warm sector ahead of N-stream vort-
max S-dip. Perhaps upwards of several hundreds J/kg MLcape beneath a
parent low-mid level trof boundary / surface cold front. Low-level
forcing apparent, if enough MLcape within modest bulk shear, can't
rule out some storms, isolated wind threats. But with late morning
timing am skeptical. Modest shear over weak MLcape, forcing along
the front more likely to get things organized over S/E New England
late morning but thinking scattered to a line of showers with some
embedded heavier rains. If model guidance suite is correct, we clear
out and dry out late day. Cold front timing crucial, must watch.
&&
.AVIATION /19Z THURSDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Short Term /through Friday Night/...
Through 00Z...
IFR cigs near the south coast should temporarily improve to VFR
19-20z but low cigs and patchy fog lingering over the Islands.
Rain ending over the islands by 19z.
Tonight...
Low confidence on northward extent of stratus and fog. Expect
IFR stratus and patchy fog to redevelop along the south coast
but uncertain how far north it expands. MVFR/IFR cigs may spread
inland to the I-95 corridor for a time tonight but confidence
is low. Higher confidence of VFR in the interior.
Friday...Moderate confidence.
MVFR cigs may linger through the morning near the south coast
with patchy IFR over the islands. Otherwise VFR cigs. NE wind
gusts to 25 kt along the coast. Dry weather.
Friday night...Moderate confidence.
Conditions lowering to MVFR/IFR along the south coast, then
spreading northward toward daybreak. Rain developing from SW to
NE well after midnight.
KBOS Terminal...Moderate confidence in TAF. There is a risk of
MVFR cigs redeveloping tonight. NE wind gusts 20-25 kt
developing after 06z.
KBDL Terminal..High confidence in TAF.
Outlook /Saturday through Tuesday/...Moderate confidence.
Saturday: Mainly IFR, with local MVFR possible. Breezy. RA
likely, patchy FG.
Saturday Night: Mainly IFR, with local MVFR possible. Breezy.
Chance RA, chance SHRA, patchy FG, slight chance TSRA.
Sunday: Mainly VFR, with local IFR possible. Breezy. Chance
SHRA, slight chance TSRA.
Sunday Night through Monday: VFR.
Monday Night through Tuesday: VFR. Chance SHRA.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Short Term /through Friday Night/...Moderate confidence.
Surge of increasing NE winds developing late tonight behind a
cold front and continuing during Friday with strong pressure
gradient in place. Gusts to 25-30 kt and SCA will continue.
Seas gradually building late tonight through Friday. Winds
diminish somewhat Friday night, but still gusty over south
coastal waters. Areas of fog will reduce vsbys tonight,
especially south coastal waters.
Outlook /Saturday through Tuesday/...Moderate confidence.
Saturday: Winds less than 25 kt. Seas up to 5 ft. Chance of
rain, patchy fog. Areas of visibility 1 nm or less.
Saturday Night: Winds less than 25 kt. Local rough seas. Chance
of rain, chance of rain showers, patchy fog, slight chance of
thunderstorms. Visibility 1 nm or less.
Sunday: Winds less than 25 kt. Areas of rough seas. Slight
chance of rain showers, slight chance of thunderstorms, patchy
fog. Local visibility 1 to 3 nm.
Sunday Night: Winds less than 25 kt. Local rough seas.
Monday: Winds less than 25 kt. Seas locally approaching 5 ft.
Monday Night through Tuesday: Winds less than 25 kt. Chance of
rain showers.
&&
.TIDES/COASTAL FLOODING...
Astronomical tides are high for the early Friday morning tide
cycle. Boston tide is 11.8 ft. With developing NE flow, may see
a surge 0.3 to 0.5 ft along the east coast. Despite light seas,
elevated water levels may result in minor splashover for the
typical low lying areas prone to tidal flooding along the
eastern MA coast.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 4 AM Friday to 2 AM EDT Saturday for
ANZ232>235-237.
Small Craft Advisory from 4 AM to 2 PM EDT Friday for ANZ230-
236.
Small Craft Advisory from 2 AM to 5 PM EDT Friday for ANZ231-
251.
Small Craft Advisory from 2 AM to 8 PM EDT Friday for ANZ250.
Small Craft Advisory from 4 AM Friday to 8 AM EDT Saturday for
ANZ254>256.
&&
SYNOPSIS...KJC/Sipprell
NEAR TERM...KJC
SHORT TERM...KJC
LONG TERM...Sipprell
AVIATION...KJC/Sipprell
MARINE...KJC/Sipprell
TIDES/COASTAL FLOODING...Hazardous weather outlook, May 17, 3:38 AM EDT, 12 hours 21 minutes before
Hazardous Weather Outlook National Weather Service Boston/Norton MA 338 AM EDT Thu May 17 2018 CTZ002>004-MAZ002>006-008>014-017-018-020-021-023-024-026-RIZ001>008- 180745- Hartford CT-Tolland CT-Windham CT-Western Franklin MA- Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA- Western Essex MA-Western Hampshire MA-Western Hampden MA- Eastern Hampshire MA-Eastern Hampden MA-Southern Worcester MA- Western Norfolk MA-Southeast Middlesex MA-Northern Bristol MA- Western Plymouth MA-Southern Bristol MA-Southern Plymouth MA- Dukes MA-Nantucket MA-Northern Middlesex MA-Northwest Providence RI- Southeast Providence RI-Western Kent RI-Eastern Kent RI-Bristol RI- Washington RI-Newport RI-Block Island RI- 338 AM EDT Thu May 17 2018 This Hazardous Weather Outlook is for northern Connecticut, central Massachusetts, eastern Massachusetts, northeastern Massachusetts, southeastern Massachusetts, western Massachusetts, and Rhode Island. .DAY ONE...Today and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Several rounds of heavy rainfall late Friday into late Saturday could result in urban and poor drainage flooding. Quick rises on area streams are also possible. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MAZ007-015-016-019-022-180745- Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-Eastern Plymouth MA- Barnstable MA- 338 AM EDT Thu May 17 2018 This Hazardous Weather Outlook is for eastern Massachusetts, northeastern Massachusetts and southeastern Massachusetts. .DAY ONE...Today and Tonight. There is a low risk for minor splashover during tonight's high tide. A coastal flood statement may be needed. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Several rounds of heavy rainfall late Friday into late Saturday could result in urban and poor drainage flooding. Quick rises on area streams are also possible. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ230>237-250-251-254>256-180745- Boston Harbor-Cape Cod Bay-Nantucket Sound-Vineyard Sound- Buzzards Bay-Rhode Island Sound-Narragansett Bay-Block Island Sound- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary-Massachusetts Bay and Ipswich Bay- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 338 AM EDT Thu May 17 2018 This Hazardous Weather Outlook is for Massachusetts and Rhode Island coastal waters. .DAY ONE...Today and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. For the latest updates, please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 3:50 AM EDT | Small Craft Advisory | BOX | 58 hr |
Nearby
Coastal Flood Statements in Massachusetts, 2018Every coastal flood statement in 2018
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.