Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 20, NWS Boston/Norton, MA

June 21, 2016Bristol County, Norfolk County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 21, 2016, 4:02 AM EDT for Bristol County, Norfolk County, Massachusetts. It was in force for 43 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 21, 2016, 4:02 AM EDT (08:02 UTC)
Expired
Jun 21, 2016, 4:45 AM EDT
In force
43 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Bristol County, MA, Norfolk County, MA

The radar

The Boston radar (KBOX), 22 km from the middle of the area, began a volume at 08:02 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 00:00Z, 8.0 hours before the alert went out and 122 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 00:00Z on 2016-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 00:00Z on 2016-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2021 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
95 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

236 
WUUS51 KBOX 210802
SVRBOX
MAC005-021-210845-
/O.NEW.KBOX.SV.W.0020.160621T0802Z-160621T0845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
402 AM EDT TUE JUN 21 2016

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN BRISTOL COUNTY IN SOUTHEASTERN MASSACHUSETTS...
  SOUTHWESTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...

* UNTIL 445 AM EDT

* AT 400 AM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER MENDON
  AND MILFORD...MOVING SOUTHEAST AT 35 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  FRANKLIN...NORTH ATTLEBOROUGH...MILFORD...STOUGHTON...ATTLEBORO...
  WALPOLE...MANSFIELD...EASTON...NORTON...SHARON...FOXBOROUGH...
  BELLINGHAM...HOLLISTON...MEDWAY...NORFOLK...WRENTHAM...
  BLACKSTONE...PLAINVILLE...MILLIS AND MENDON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4208 7108 4191 7118 4198 7138 4202 7138
      4202 7150 4212 7150 4213 7148 4215 7148
      4218 7144
TIME...MOT...LOC 0800Z 292DEG 29KT 4210 7154 

HAIL...<.75IN
WIND...60MPH
 
$$

WTB
2 follow-up statements
133 
WWUS51 KBOX 210824
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
424 AM EDT TUE JUN 21 2016

MAC005-021-210845-
/O.CON.KBOX.SV.W.0020.000000T0000Z-160621T0845Z/
BRISTOL MA-NORFOLK MA-
424 AM EDT TUE JUN 21 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 AM EDT
FOR NORTHWESTERN BRISTOL AND SOUTHWESTERN NORFOLK COUNTIES...

AT 423 AM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
PLAINVILLE AND NORTH ATTLEBOROUGH...MOVING EAST AT 35 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
FRANKLIN...NORTH ATTLEBOROUGH...MILFORD...STOUGHTON...ATTLEBORO...
WALPOLE...MANSFIELD...EASTON...NORTON...SHARON...FOXBOROUGH...
BELLINGHAM...HOLLISTON...MEDWAY...NORFOLK...WRENTHAM...BLACKSTONE...
PLAINVILLE...MILLIS AND MENDON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4208 7108 4191 7118 4198 7138 4202 7138
      4202 7150 4212 7150 4213 7148 4215 7148
      4218 7144
TIME...MOT...LOC 0823Z 292DEG 29KT 4203 7130 

HAIL...<.75IN
WIND...60MPH
 
$$

WTB
407 
WWUS51 KBOX 210841
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
441 AM EDT TUE JUN 21 2016

MAC005-021-210851-
/O.EXP.KBOX.SV.W.0020.000000T0000Z-160621T0845Z/
BRISTOL MA-NORFOLK MA-
441 AM EDT TUE JUN 21 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BRISTOL AND
SOUTHWESTERN NORFOLK COUNTIES WILL EXPIRE AT 445 AM EDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE...THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER HEAVY RAIN
IS STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4208 7108 4191 7118 4198 7138 4202 7138
      4202 7150 4212 7150 4213 7148 4215 7148
      4218 7144
TIME...MOT...LOC 0837Z 292DEG 29KT 4203 7130 

$$

WTB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 1:39 AM EDTSpecial Weather StatementBOXFranklin51 min
Jun 21, 3:05 AM EDTSpecial Weather StatementBOXMiddlesex, Worcester55 min
Jun 21, 3:22 AM EDTSpecial Weather StatementBOXHampden, Hampshire53 min
Jun 21, 4:05 AM EDTSevere Thunderstorm WarningBOXHampden40 min
Jun 21, 4:18 AM EDTSpecial Marine WarningBOX87 min
Jun 21, 4:34 AM EDTSpecial Marine WarningBOX86 min
Jun 21, 4:56 AM EDTSpecial Marine WarningBOX2 hr
Jun 21, 5:12 AM EDTSevere Thunderstorm WarningBOXBristol48 min
Jun 21, 5:38 AM EDTSpecial Marine WarningBOX112 min
Jun 21, 5:44 AM EDTSpecial Marine WarningBOX61 min
Jun 21, 3:39 PM EDTSmall Craft Advisory for Hazardous SeasBOX39 hr

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2016Every severe thunderstorm warning in 2016

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.