Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 65, NWS Boston/Norton, MA

July 13, 2011Bristol County, Plymouth County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 13, 2011, 6:02 PM EDT for Bristol County, Plymouth County, Massachusetts. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 13, 2011, 6:02 PM EDT (22:02 UTC)
Expired: Jul 13, 2011, 6:45 PM EDT
In force: 43 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Bristol County, MA, Plymouth County, MA

The radar

The Boston radar (KBOX), 29 km from the middle of the area, began a volume at 22:06 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.

What was reported inside it

Time	Report	Where	Remark
Jul 13, 6:30 PM EDT	TSTM WND DMG	Rochester, MA	TREES DOWN ON MARYS POND ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 10.0 hours before the alert went out and 75 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: 8 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1378 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

764 
WUUS51 KBOX 132202
SVRBOX
MAC005-023-132245-
/O.NEW.KBOX.SV.W.0065.110713T2202Z-110713T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
602 PM EDT WED JUL 13 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS...
  THIS INCLUDES THE CITY OF NEW BEDFORD...
  SOUTHERN PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS...

* UNTIL 645 PM EDT

* AT 601 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  LAKEVILLE...OR 11 MILES EAST OF TAUNTON...AND WAS MOVING SOUTHEAST
  AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...ACUSHNET AND ROCHESTER.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL...AS WELL
AS DEADLY LIGHTNING AND TORRENTIAL RAIN. GET TO SAFE SHELTER NOW...
INSIDE A STURDY BUILDING OR IN A VEHICLE. DO NOT SEEK SHELTER UNDER
TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING. DRIVERS SHOULD BE ALERT FOR PONDING OF WATER AND AVOID
FLOODED ROADS.

&&

LAT...LON 4181 7064 4162 7094 4182 7113 4193 7092
TIME...MOT...LOC 2203Z 307DEG 18KT 4185 7089

$$

FRANK

2 follow-up statements

789 
WWUS51 KBOX 132218
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
618 PM EDT WED JUL 13 2011

MAC005-023-132245-
/O.CON.KBOX.SV.W.0065.000000T0000Z-110713T2245Z/
PLYMOUTH MA-BRISTOL MA-
618 PM EDT WED JUL 13 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR EAST CENTRAL BRISTOL AND SOUTHERN PLYMOUTH COUNTIES IN SOUTHEAST
MASSACHUSETTS...

AT 615 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 6 MILES NORTH OF ROCHESTER...OR 12 MILES NORTHEAST OF NEW
BEDFORD...MOVING SOUTHEAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ACUSHNET

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 4191 7088 4181 7064 4162 7094 4177 7109
TIME...MOT...LOC 2218Z 307DEG 18KT 4180 7081

$$

FRANK

659 
WWUS51 KBOX 132234
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
634 PM EDT WED JUL 13 2011

MAC005-023-132245-
/O.CON.KBOX.SV.W.0065.000000T0000Z-110713T2245Z/
PLYMOUTH MA-BRISTOL MA-
634 PM EDT WED JUL 13 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR EAST CENTRAL BRISTOL AND SOUTH CENTRAL PLYMOUTH COUNTIES IN
SOUTHEAST MASSACHUSETTS...

AT 629 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ROCHESTER...OR 12 MILES NORTHEAST OF NEW BEDFORD...
MOVING SOUTHEAST AT 20 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 4171 7102 4187 7079 4181 7064 4162 7094
TIME...MOT...LOC 2234Z 307DEG 18KT 4175 7072

$$

FRANK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 4:39 PM EDT	Special Weather Statement	BOX	Norfolk	51 min
Jul 13, 5:12 PM EDT	Special Weather Statement	BOX	Plymouth	48 min
Jul 13, 5:26 PM EDT	Special Weather Statement	BOX	Bristol	49 min
Jul 13, 5:28 PM EDT	Areal Flood Advisory	BOX	Bristol, Plymouth	78 min
Jul 13, 5:45 PM EDT	Special Weather Statement	BOX	Plymouth	45 min
Jul 13, 5:48 PM EDT	Special Weather Statement	BOX	Bristol	42 min
Jul 13, 5:51 PM EDT	Special Marine Warning	BOX		54 min
Jul 13, 5:57 PM EDT	Special Weather Statement	BOX	Plymouth	63 min
Jul 13, 6:10 PM EDT	Areal Flood Advisory	BOX	Bristol, Franklin, Hampden, Hampshire, Plymouth	13 days
Jul 13, 6:16 PM EDT	Special Weather Statement	BOX	Bristol	44 min
Jul 13, 6:19 PM EDT	Special Weather Statement	BOX	Franklin	56 min
Jul 13, 6:21 PM EDT	Severe Thunderstorm Warning	BOX	Bristol	27 min
Jul 13, 6:23 PM EDT	Special Marine Warning	BOX		67 min
Jul 13, 6:44 PM EDT	Special Weather Statement	BOX	Dukes	46 min
Jul 13, 7:24 PM EDT	Special Weather Statement	BOX	Dukes	66 min
Jul 13, 7:27 PM EDT	Special Marine Warning	BOX		63 min
Jul 13, 7:44 PM EDT	Special Marine Warning	BOX		61 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.