Alert archive / Massachusetts / Special Weather Statements in 2020

Special Weather Statement, NWS Boston/Norton, MA

June 29, 2020Dukes County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Jun 29, 2020, 4:38 AM EDT for Dukes County, Massachusetts. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 29, 2020, 4:38 AM EDT (08:38 UTC)
Expired: Jun 29, 2020, 5:30 AM EDT
In force: 52 min
Issued by: NWS Boston/Norton, MA

County Dukes County, MA

The radar

The Boston radar (KBOX), 62 km from the middle of the area, began a volume at 08:40 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

Brookhaven, NY (KOKX), launched 00:00Z, 8.6 hours before the alert went out and 190 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: 1384 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 1024 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather 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 special weather statement went out at Jun 29, 3:33 AM EDT, 1 hour 5 minutes earlier.

Area forecast discussion, Jun 29, 3:33 AM EDT, 1 hour 5 minutes before

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Hazardous weather outlook, Jun 29, 4:23 AM EDT, 15 minutes before

Hazardous Weather Outlook
National Weather Service Boston/Norton MA
423 AM EDT Mon Jun 29 2020

CTZ002>004-MAZ002>024-026-RIZ001>008-300830-
Hartford CT-Tolland CT-Windham CT-Western Franklin MA-
Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA-
Western Essex MA-Eastern Essex MA-Western Hampshire MA-
Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA-
Southern Worcester MA-Western Norfolk MA-Southeast Middlesex MA-
Suffolk MA-Eastern Norfolk MA-Northern Bristol MA-
Western Plymouth MA-Eastern Plymouth MA-Southern Bristol MA-
Southern Plymouth MA-Barnstable 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-
423 AM EDT Mon Jun 29 2020

This Hazardous Weather Outlook is for northern Connecticut, all of
Massachusetts east of Berkshire County, and Rhode Island.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230>237-250-251-254>256-300830-
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-
423 AM EDT Mon Jun 29 2020

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...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

For more information on upcoming hazardous weather, please see the
Area Forecast Discussion on our webpage for the latest forecast
thinking. There is also our Enhanced Hazardous Weather Outlook at
www.weather.gov/box/ehwo

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
www.facebook.com/us.nationalweatherservice.boston.gov

You can follow us on Twitter at
@NWSBoston

In the hours before

Special weather statement, Jun 29, 12:09 AM EDT, 4 hours 29 minutes before

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Special weather statement, Jun 29, 12:39 AM EDT, 3 hours 59 minutes before

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Special weather statement, Jun 29, 1:07 AM EDT, 3 hours 31 minutes before

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Special weather statement, Jun 29, 2:54 AM EDT, 1 hour 44 minutes before

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Special weather statement, Jun 29, 4:38 AM EDT, 0 minutes before

Special Weather Statement
National Weather Service Boston/Norton MA
438 AM EDT Mon Jun 29 2020

MAZ022-023-290930-
Dukes MA-Barnstable MA-
438 AM EDT Mon Jun 29 2020

...STRONG THUNDERSTORM OVER SOUTHWEST BUZZARDS BAY...

At 438 AM EDT, Doppler radar was tracking a strong thunderstorm near
Gosnold, or 9 miles south of Dartmouth, moving east at 15 mph.

Penny size hail and winds in excess of 40 mph will accompany this
storm.

Locations impacted include...
Falmouth, Oak Bluffs, Edgartown, Tisbury, West Tisbury, Chilmark and
Gosnold.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when this storm approaches. Winds may be strong enough to
produce minor damage, such as a few downed branches.

Frequent lightning was occurring. Lightning can strike far away from
the storm. Go inside a building or vehicle. Wait at least 30 minutes
until after the storm has passed to resume outdoor activities.

&&

LAT...LON 4141 7095 4143 7089 4145 7092 4145 7090
      4141 7075 4141 7071 4147 7076 4144 7084
      4145 7084 4152 7070 4146 7063 4153 7069
      4153 7068 4162 7065 4165 7056 4155 7053
      4152 7065 4138 7047
TIME...MOT...LOC 0837Z 255DEG 15KT 4143 7097

BL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 8:02 PM EDT	Special Weather Statement	BOX	Middlesex	58 min
Jun 29, 12:09 AM EDT	Special Weather Statement	BOX	Essex	51 min
Jun 29, 12:39 AM EDT	Special Weather Statement	BOX	Middlesex	36 min
Jun 29, 12:54 AM EDT	Special Marine Warning	BOX		66 min
Jun 29, 12:57 AM EDT	Special Marine Warning	BOX		33 min
Jun 29, 1:07 AM EDT	Special Weather Statement	BOX	Suffolk	38 min
Jun 29, 2:54 AM EDT	Special Weather Statement	BOX	Plymouth	51 min
Jun 29, 4:35 AM EDT	Special Marine Warning	BOX		35 min
Jun 29, 7:32 AM EDT	Special Marine Warning	BOX		58 min
Jun 29, 7:35 AM EDT	Special Weather Statement	BOX	Barnstable	40 min
Jun 29, 7:51 AM EDT	Special Marine Warning	BOX		24 min
Jun 29, 8:15 AM EDT	Special Weather Statement	BOX	Barnstable	30 min
Jun 29, 8:28 AM EDT	Special Marine Warning	BOX		62 min
Jun 29, 9:00 AM EDT	Special Marine Warning	BOX		60 min
Jun 29, 9:21 AM EDT	Special Marine Warning	BOX		39 min
Jun 29, 9:24 AM EDT	Special Weather Statement	BOX	Nantucket	36 min
Jun 29, 9:28 AM EDT	Severe Thunderstorm Warning	BOX	Nantucket	32 min
Jun 29, 9:37 AM EDT	Special Marine Warning	BOX		53 min
Jun 29, 9:58 AM EDT	Special Marine Warning	BOX		47 min
Jun 29, 11:11 AM EDT	Special Marine Warning	BOX		34 min
Jun 29, 12:14 PM EDT	Special Weather Statement	BOX	Norfolk	46 min
Jun 29, 1:01 PM EDT	Special Weather Statement	BOX	Bristol	59 min
Jun 29, 1:56 PM EDT	Special Marine Warning	BOX		64 min
Jun 29, 1:58 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire	47 min
Jun 29, 2:07 PM EDT	Special Weather Statement	BOX	Franklin	38 min
Jun 29, 2:10 PM EDT	Special Weather Statement	BOX	Dukes	65 min
Jun 29, 2:15 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire	45 min
Jun 29, 2:30 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Dukes	34 min
Jun 29, 2:33 PM EDT	Special Marine Warning	BOX		32 min
Jun 29, 2:37 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	38 min
Jun 29, 2:51 PM EDT	Special Weather Statement	BOX	Hampshire	39 min
Jun 29, 3:02 PM EDT	Special Marine Warning	BOX		58 min
Jun 29, 3:06 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	36 min
Jun 29, 4:01 PM EDT	Special Weather Statement	BOX	Middlesex	44 min
Jun 29, 11:33 AM EDT	Special Weather Statement	BOX	Providence	42 min
Jun 29, 2:56 PM EDT	Severe Thunderstorm Warning	BOX	Washington	25 min
Jun 29, 5:39 PM EDT	Special Weather Statement	BOX	Washington	51 min
Jun 29, 3:38 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	40 min

Nearby

Special Weather Statements in Massachusetts, 2020 Every special weather 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.