Alert archive / Massachusetts / Coastal Flood Statements in 2020

Coastal Flood Statement 13, NWS Boston/Norton, MA

November 30, 20204 counties in Rhode Island; 5 counties in Massachusetts

NWS Boston/Norton, MA issued this coastal flood statement at Nov 30, 2020, 3:03 PM EST for 4 counties in Rhode Island; 5 counties in Massachusetts. It took effect at Nov 30, 2020, 5:00 PM EST. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Nov 30, 2020, 3:03 PM EST (20:03 UTC)
In effect from: Nov 30, 2020, 5:00 PM EST
Expired: Nov 30, 2020, 10:00 PM EST
In force: 5 hr
Issued by: NWS Boston/Norton, MA

Counties Barnstable County, MA, Bristol County, MA, Dukes County, MA, Nantucket County, MA, Plymouth County, MA, Bristol County, RI, Kent County, RI, Newport County, RI, Washington County, RI

The radar

The Boston radar (KBOX), 43 km from the middle of the area, began a volume at 20:06 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, 8.1 hours before the alert went out and 82 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1136 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

738 
WHUS41 KBOX 302003
CFWBOX

Coastal Hazard Message
National Weather Service Boston/Norton MA
303 PM EST Mon Nov 30 2020

MAZ020>024-RIZ004>008-010300-
/O.NEW.KBOX.CF.S.0013.201130T2200Z-201201T0300Z/
Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA-
Nantucket MA-Eastern Kent RI-Bristol RI-Washington RI-Newport RI-
Block Island RI-
303 PM EST Mon Nov 30 2020

* WHAT...Minor splashover possible around the time of high tide
  this evening.

* WHERE...South facing coastlines in Rhode Island and southeast
  Massachusetts.

* WHEN...Until 10 PM EST this evening.

* IMPACTS...Some water on low lying roads and property.

* ADDITIONAL DETAILS...Minor beach erosion is possible from rough
  surf.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not drive through any flooded roadways.

&&

&&

Time of high total tides are approximate to the nearest hour.

Narragansett Bay at Conimicut Point
MLLW Categories - Minor 7.0 ft, Moderate 8.5 ft, Major 10.0 ft
MHHW Categories - Minor 2.4 ft, Moderate 3.9 ft, Major 5.4 ft

             Total      Total    Departure                   
 Day/Time    Tide       Tide     from Norm   Waves    Flood  
            ft MLLW    ft MHHW       ft       ft      Impact 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   6.0/ 6.5   1.4/ 1.9   2.1/ 2.6     3       None    
 01/08 AM   5.4/ 5.9   0.8/ 1.3   1.0/ 1.5    1-2      None    
 01/09 PM   4.9/ 5.4   0.2/ 0.8   1.0/ 1.5     2       None    
 02/09 AM   5.2/ 5.7   0.6/ 1.1   0.9/ 1.4     1       None

Narragansett Bay at Quonset Point
MLLW Categories - Minor 6.0 ft, Moderate 7.5 ft, Major 9.5 ft
MHHW Categories - Minor 1.9 ft, Moderate 3.4 ft, Major 5.4 ft

             Total      Total    Departure                   
 Day/Time    Tide       Tide     from Norm   Waves    Flood  
            ft MLLW    ft MHHW       ft       ft      Impact 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   5.1/ 5.6   1.0/ 1.5   1.7/ 2.2     3       None    
 01/08 AM   4.7/ 5.2   0.7/ 1.1   0.9/ 1.4    1-2      None    
 01/08 PM   4.2/ 4.7   0.1/ 0.6   0.8/ 1.3     2       None    
 02/09 AM   4.5/ 5.0   0.4/ 0.9   0.6/ 1.1    1-2      None

Mount Hope Bay near Bristol Point RI
MLLW Categories - Minor 7.0 ft, Moderate 9.5 ft, Major 12.0 ft
MHHW Categories - Minor 2.5 ft, Moderate 5.0 ft, Major 7.5 ft

             Total      Total    Departure                   
 Day/Time    Tide       Tide     from Norm   Waves    Flood  
            ft MLLW    ft MHHW       ft       ft      Impact 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   5.4/ 5.9   0.9/ 1.4   1.8/ 2.2     3       None    
 01/08 AM   5.2/ 5.7   0.8/ 1.3   0.9/ 1.4    1-2      None    
 01/09 PM   4.4/ 4.9  -0.2/ 0.3   0.8/ 1.3    1-3      None    
 02/09 AM   5.0/ 5.5   0.5/ 1.0   0.7/ 1.1    1-2      None

Westerly RI at Watch Hill
MLLW Categories - Minor 5.0 ft, Moderate 8.0 ft, Major 9.5 ft
MHHW Categories - Minor 1.9 ft, Moderate 4.9 ft, Major 6.4 ft

             Total      Total    Departure                   
 Day/Time    Tide       Tide     from Norm   Waves    Flood  
            ft MLLW    ft MHHW       ft       ft      Impact 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   4.4/ 4.9   1.3/ 1.8   2.1/ 2.6   12-13     None    
 01/09 AM   4.0/ 4.5   1.0/ 1.5   1.3/ 1.8     7       None    
 01/09 PM   3.4/ 3.9   0.2/ 0.8   1.1/ 1.6    7-8      None    
 02/10 AM   3.7/ 4.2   0.6/ 1.1   1.0/ 1.5    6-7      None

Newport Harbor
MLLW Categories - Minor 6.0 ft, Moderate 7.5 ft, Major 9.0 ft
MHHW Categories - Minor 1.9 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 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   4.9/ 5.4   0.8/ 1.3   1.7/ 2.2     3       None    
 01/08 AM   4.6/ 5.1   0.5/ 1.0   0.9/ 1.4    1-2      None    
 01/08 PM   4.0/ 4.5  -0.2/ 0.3   0.8/ 1.3    2-3      None    
 02/09 AM   4.2/ 4.7   0.2/ 0.7   0.6/ 1.1    1-3      None

Newport South Coast Beaches
MLLW Categories - Minor 6.0 ft, Moderate 7.5 ft, Major 9.0 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 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   4.6/ 5.1   1.1/ 1.6   1.7/ 2.2   14-17     None    
 01/08 AM   4.4/ 4.9   0.9/ 1.4   1.0/ 1.5   9-10      None    
 01/08 PM   3.7/ 4.2   0.2/ 0.8   0.9/ 1.4   9-10      None    
 02/08 AM   4.0/ 4.5   0.5/ 1.0   0.7/ 1.1    6-7      None

Block Island at Old Harbor
MLLW Categories - Minor 6.0 ft, Moderate 7.5 ft, Major 9.0 ft
MHHW Categories - Minor 2.7 ft, Moderate 4.2 ft, Major 5.7 ft

             Total      Total    Departure                   
 Day/Time    Tide       Tide     from Norm   Waves    Flood  
            ft MLLW    ft MHHW       ft       ft      Impact 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   4.2/ 4.7   0.9/ 1.4   1.8/ 2.2   15-18     None    
 01/08 AM   4.0/ 4.5   0.8/ 1.3   1.2/ 1.7   11-12     None    
 01/08 PM   3.4/ 3.9   0.1/ 0.6   1.1/ 1.6    11       None    
 02/08 AM   3.7/ 4.2   0.5/ 1.0   0.9/ 1.4    8-9      None

New Bedford Hurricane Barrier
MLLW Categories - Minor 6.5 ft, Moderate 8.0 ft, Major 10.0 ft
MHHW Categories - Minor 2.6 ft, Moderate 4.1 ft, Major 6.1 ft

             Total      Total    Departure                   
 Day/Time    Tide       Tide     from Norm   Waves    Flood  
            ft MLLW    ft MHHW       ft       ft      Impact 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   5.6/ 6.1   1.7/ 2.2   2.3/ 2.8     3       None    
 01/08 AM   5.5/ 6.0   1.6/ 2.0   1.6/ 2.0    1-2      None    
 01/09 PM   4.7/ 5.2   0.8/ 1.3   1.5/ 2.0    2-4      None    
 02/09 AM   5.2/ 5.7   1.4/ 1.9   1.5/ 2.0    1-4      None

Westport
MLLW Categories - Minor 6.0 ft, Moderate 8.0 ft, Major 10.0 ft
MHHW Categories - Minor 2.5 ft, Moderate 4.5 ft, Major 6.5 ft

             Total      Total    Departure                   
 Day/Time    Tide       Tide     from Norm   Waves    Flood  
            ft MLLW    ft MHHW       ft       ft      Impact 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   5.1/ 5.6   1.6/ 2.0   2.2/ 2.7   10-13     None    
 01/08 AM   4.7/ 5.2   1.3/ 1.8   1.5/ 2.0    8-9      None    
 01/09 PM   4.2/ 4.7   0.7/ 1.1   1.4/ 1.9     9       None    
 02/09 AM   4.5/ 5.0   1.0/ 1.5   1.3/ 1.8    6-7      None

Mount Hope Bay near Fall River MA
MLLW Categories - Minor 7.0 ft, Moderate 9.5 ft, Major 12.0 ft
MHHW Categories - Minor 2.3 ft, Moderate 4.8 ft, Major 7.3 ft

             Total      Total    Departure                   
 Day/Time    Tide       Tide     from Norm   Waves    Flood  
            ft MLLW    ft MHHW       ft       ft      Impact 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   5.7/ 6.2   1.0/ 1.5   1.6/ 2.0     3       None    
 01/08 AM   5.4/ 5.9   0.7/ 1.1   0.8/ 1.3     2       None    
 01/09 PM   4.9/ 5.4   0.2/ 0.7   0.8/ 1.3     2       None    
 02/09 AM   5.2/ 5.7   0.6/ 1.1   0.8/ 1.3    1-2      None

Buzzards Bay at Mattapoisett
MLLW Categories - Minor 8.5 ft, Moderate 10.0 ft, Major 12.0 ft
MHHW Categories - Minor 4.4 ft, Moderate 5.9 ft, Major 7.9 ft

             Total      Total    Departure                   
 Day/Time    Tide       Tide     from Norm   Waves    Flood  
            ft MLLW    ft MHHW       ft       ft      Impact 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   6.2/ 6.7   2.1/ 2.6   2.7/ 3.2     4       None    
 01/08 AM   5.9/ 6.4   1.8/ 2.2   1.8/ 2.2     2       None    
 01/08 PM   5.2/ 5.7   1.1/ 1.6   1.8/ 2.2     4       None    
 02/09 AM   5.7/ 6.2   1.6/ 2.0   1.7/ 2.2    1-4      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 
 --------  ---------  ---------  ---------  -------  --------

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 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   6.1/ 6.6   1.7/ 2.2   2.5/ 3.0     3      Minor    
 01/08 AM   5.7/ 6.2   1.4/ 1.9   1.5/ 2.0    1-2      None    
 01/09 PM   5.0/ 5.5   0.6/ 1.1   1.5/ 2.0    2-3      None    
 02/09 AM   5.5/ 6.0   1.1/ 1.6   1.3/ 1.8    1-4      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 
 --------  ---------  ---------  ---------  -------  --------
 01/12 AM   9.9/10.4  -0.2/ 0.2   1.2/ 1.7     4       None    
 01/12 PM  11.0/11.5   0.9/ 1.4   1.2/ 1.7    1-2      None    
 02/12 AM   9.5/10.0  -0.7/-0.2   0.8/ 1.3    2-3      None    
 02/12 PM  10.6/11.1   0.5/ 1.0   0.8/ 1.3    4-5      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 
 --------  ---------  ---------  ---------  -------  --------
 30/08 PM   4.4/ 4.9   2.3/ 2.8   2.3/ 2.8     3       None    
 01/08 AM   4.0/ 4.5   2.0/ 2.5   1.6/ 2.0     2       None    
 01/09 PM   3.6/ 4.1   1.6/ 2.0   1.6/ 2.0     3       None    
 02/09 AM   3.7/ 4.2   1.8/ 2.2   1.4/ 1.9    1-5      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 
 --------  ---------  ---------  ---------  -------  --------
 30/11 PM  10.3/10.8  -0.2/ 0.2   1.3/ 1.8     3       None    
 01/12 PM  11.5/12.0   1.0/ 1.5   1.3/ 1.8     2       None    
 02/12 AM  10.0/10.5  -0.6/-0.1   0.9/ 1.4     2       None    
 02/12 PM  11.2/11.7   0.7/ 1.1   1.0/ 1.5    3-4      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 
 --------  ---------  ---------  ---------  -------  --------
 01/01 AM   4.7/ 5.2  -3.1/-2.6   0.4/ 0.9   11-13     None    
 01/12 PM   5.5/ 6.0  -2.2/-1.8   0.2/ 0.8    8-9      None    
 02/01 AM   4.2/ 4.7  -3.6/-3.1   0.0/ 0.5    6-7      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 
 --------  ---------  ---------  ---------  -------  --------
 30/11 PM   9.2/ 9.7  -1.1/-0.7   1.4/ 1.9    5-6      None    
 01/12 PM  10.3/10.8   0.0/ 0.5   1.5/ 2.0    1-2      None    
 02/12 AM   8.9/ 9.4  -1.5/-1.0   1.1/ 1.6     2       None    
 02/12 PM   9.9/10.4  -0.5/ 0.0   1.1/ 1.6    3-4      None

Vineyard Haven
MLLW Categories - Minor 5.0 ft, Moderate 6.5 ft, Major 8.5 ft
MHHW Categories - Minor 3.0 ft, Moderate 4.5 ft, Major 6.5 ft

             Total      Total    Departure                   
 Day/Time    Tide       Tide     from Norm   Waves    Flood  
            ft MLLW    ft MHHW       ft       ft      Impact 
 --------  ---------  ---------  ---------  -------  --------
 30/10 PM   3.4/ 3.9   1.4/ 1.9   2.2/ 2.7     3       None    
 01/12 PM   3.2/ 3.7   1.2/ 1.7   1.5/ 2.0    2-3      None    
 01/11 PM   2.5/ 3.0   0.5/ 1.0   1.2/ 1.7    2-3      None    
 02/12 PM   2.7/ 3.2   0.8/ 1.3   1.2/ 1.7    4-5      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 
 --------  ---------  ---------  ---------  -------  --------
 01/01 AM   3.6/ 4.1   0.0/ 0.5   1.1/ 1.6     4       None    
 01/12 PM   4.4/ 4.9   0.8/ 1.3   1.1/ 1.6    2-3      None    
 02/01 AM   3.4/ 3.9  -0.2/ 0.2   0.8/ 1.3     3       None

&&

$$

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 30, 3:29 AM EST	High Wind Warning	BOX	Bristol, Kent, Newport, Providence, Washington	19 hr
Nov 30, 2:56 PM EST	Gale Warning	BOX		16 hr
Nov 30, 2:56 PM EST	Storm Warning	BOX		7 hr

Nearby

Coastal Flood Statements in Massachusetts, 2020 Coastal Flood Statements in Rhode Island, 2020 Every coastal flood statement in 2020

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.