Alert archive / Massachusetts / Special Weather Statements in 2018

Special Weather Statement, NWS Boston/Norton, MA

August 8, 2018Plymouth County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Aug 8, 2018, 2:09 PM EDT for Plymouth County, Massachusetts. It was in force for 36 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
Aug 8, 2018, 2:09 PM EDT (18:09 UTC)
Expired
Aug 8, 2018, 2:45 PM EDT
In force
36 min
Issued by
NWS Boston/Norton, MA

County Plymouth County, MA

The radar

The Boston radar (KBOX), 41 km from the middle of the area, began a volume at 18:10 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, 6.2 hours before the alert went out and 85 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-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 2018-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 227 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2018-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
227 J/kg
Mixed-layer CIN
-100 J/kg
Mixed-layer LCL
951 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
-2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Aug 8, 1:58 PM EDT, 11 minutes earlier.

Area forecast discussion, Aug 8, 1:58 PM EDT, 11 minutes before
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Hazardous weather outlook, Aug 8, 3:31 AM EDT, 10 hours 38 minutes before
Hazardous Weather Outlook
National Weather Service Boston/Norton MA
331 AM EDT Wed Aug 8 2018

CTZ002>004-MAZ003>007-010>021-026-RIZ001>007-090745-
Hartford CT-Tolland CT-Windham CT-Eastern Franklin MA-
Northern Worcester MA-Central Middlesex MA-Western Essex MA-
Eastern Essex 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-Northern Middlesex MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-Bristol RI-
Washington RI-Newport RI-
331 AM EDT Wed Aug 8 2018

...HEAT ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for northern Connecticut, central
Massachusetts, eastern Massachusetts, northeastern Massachusetts,
southeastern Massachusetts, western Massachusetts, northern Rhode
Island and southern Rhode Island.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Heat Advisory.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

A few strong to severe thunderstorms are possible this afternoon
through Thursday. Main threat would be very localized strong to
damaging wind gusts. In addition...any thunderstorm that develop will
be capable of producing torrential rainfall resulting a very
localized flood threat.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MAZ002-008-009-022>024-RIZ008-090745-
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Barnstable MA-Dukes MA-Nantucket MA-Block Island RI-
331 AM EDT Wed Aug 8 2018

This Hazardous Weather Outlook is for southeastern Massachusetts,
western Massachusetts and southern Rhode Island.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

A few strong to severe thunderstorms are possible this afternoon
through Thursday. Main threat would be very localized strong to
damaging wind gusts. In addition...any thunderstorm that develop will
be capable of producing torrential rainfall resulting a very
localized flood threat

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230>237-250-251-254>256-090745-
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-
331 AM EDT Wed Aug 8 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...Thursday through Tuesday.

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

In the hours before

Special weather statement, Aug 8, 2:09 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Boston/Norton MA
209 PM EDT WED AUG 8 2018

MAZ019-081845-
Eastern Plymouth MA-
209 PM EDT WED AUG 8 2018

...STRONG THUNDERSTORM OVER THE SOUTH SHORE...

At 207 PM EDT, Doppler radar was tracking a strong thunderstorm over
Norwell and Scituate moving east at 15 mph.

Winds in excess of 30 mph and locally heavy rainfall will accompany
this storm.

Locations impacted include...
Marshfield, Scituate and Norwell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4214 7079 4218 7082 4225 7073 4221 7070
      4218 7070 4218 7071 4216 7069 4215 7072
TIME...MOT...LOC 1807Z 251DEG 14KT 4220 7073

Field

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 8:50 PM EDTAreal Flood AdvisoryBOXHampden55 min
Aug 8, 3:29 AM EDTHeat AdvisoryBOXBristol, Essex, Franklin, Hampden, Hampshire, Middlesex and 4 more15 hr
Aug 8, 3:05 PM EDTSpecial Weather StatementBOXNorfolk40 min
Aug 8, 3:14 PM EDTAreal Flood AdvisoryBOXNorfolk, Suffolk39 min
Aug 8, 3:54 PM EDTAreal Flood AdvisoryBOXNorfolk, Worcester66 min
Aug 8, 4:47 PM EDTSpecial Weather StatementBOXHampden43 min
Aug 8, 4:54 PM EDTSpecial Weather StatementBOXFranklin51 min
Aug 8, 4:58 PM EDTSpecial Weather StatementBOXFranklin47 min
Aug 8, 5:48 PM EDTSpecial Weather StatementBOXFranklin57 min
Aug 8, 6:27 PM EDTSpecial Weather StatementBOXWorcester48 min
Aug 8, 7:28 PM EDTSpecial Weather StatementBOXMiddlesex47 min
Aug 8, 7:38 PM EDTAreal Flood AdvisoryBOXEssex, Middlesex, Worcester82 min
Aug 8, 7:44 PM EDTFlash Flood WarningBOXMiddlesex, Worcester67 min
Aug 8, 7:50 PM EDTSevere Thunderstorm WarningBOXEssex, Middlesex, Suffolk, Worcester55 min
Aug 7, 9:35 PM EDTFlash Flood WarningBOXCapitol Planning Region94 min

Nearby

Special Weather Statements in Massachusetts, 2018Every special weather 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.