Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 28, NWS Boston/Norton, MA

June 23, 2012Norfolk County, Plymouth County, Suffolk County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 23, 2012, 5:22 PM EDT for Norfolk County, Plymouth County, Suffolk County, Massachusetts. It was in force for 53 min. 3 reports 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: Jun 23, 2012, 5:22 PM EDT (21:22 UTC)
Expired: Jun 23, 2012, 6:15 PM EDT
In force: 53 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Norfolk County, MA, Plymouth County, MA, Suffolk County, MA

The radar

The Boston radar (KBOX), 37 km from the middle of the area, began a volume at 21:23 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
Jun 23, 5:25 PM EDT	TSTM WND DMG	Brookline, MA	TENTS AT AMATEUR RADIO FIELD DAY SITE BLOWN OVER. SEVERAL TREES DOWN
Jun 23, 6:04 PM EDT	TSTM WND DMG	Hingham, MA	4 TREES DOWN ON 4 DIFFERENT STREETS WITH ONE ROAD BLOCKED WITH FALLEN TREE
Jun 23, 6:10 PM EDT	TSTM WND DMG	Cohasset, MA	TREES AND WIRES DOWN IN MULTIPLE LOCATIONS THROUGHOUT THE TOWN

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, 9.4 hours before the alert went out and 108 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: 365 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 949 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

156 
WUUS51 KBOX 232122
SVRBOX
MAC021-023-025-232215-
/O.NEW.KBOX.SV.W.0028.120623T2122Z-120623T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
522 PM EDT SAT JUN 23 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
  THIS INCLUDES THE CITIES OF...WEYMOUTH...QUINCY...BROOKLINE...
  SOUTHERN SUFFOLK COUNTY IN EASTERN MASSACHUSETTS...
  THIS INCLUDES THE CITY OF BOSTON...
  NORTHWESTERN PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS...
  THIS INCLUDES THE CITY OF BROCKTON...

* UNTIL 615 PM EDT

* AT 518 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM BROOKLINE TO DEDHAM TO NORWOOD
  TO CANTON TO HOLBROOK...OR ALONG A LINE EXTENDING FROM BROOKLINE TO
  7 MILES SOUTH OF BROOKLINE TO 10 MILES SOUTH OF BROOKLINE TO 7
  MILES NORTHWEST OF BROCKTON TO BROCKTON...AND WAS MOVING NORTHEAST
  AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...ABINGTON...WHITMAN...
  RANDOLPH...ROCKLAND...MILTON...BRAINTREE...HINGHAM...COHASSET AND
  HULL.

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 4208 7090 4207 7103 4218 7122 4232 7117
      4233 7115 4235 7100 4233 7101 4232 7097
      4236 7096 4234 7096 4233 7092 4231 7091
      4232 7089 4234 7090 4234 7087 4232 7089
      4228 7085 4226 7076
TIME...MOT...LOC 2123Z 247DEG 16KT 4233 7113 4224 7116
          4219 7116 4216 7109 4214 7098

$$

SIPPRELL

1 follow-up statement

761 
WWUS51 KBOX 232153
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
553 PM EDT SAT JUN 23 2012

MAC021-023-025-232215-
/O.CON.KBOX.SV.W.0028.000000T0000Z-120623T2215Z/
NORFOLK MA-PLYMOUTH MA-SUFFOLK MA-
553 PM EDT SAT JUN 23 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR EAST CENTRAL SUFFOLK...NORTH CENTRAL PLYMOUTH AND NORTHEASTERN
NORFOLK COUNTIES...

AT 548 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES NORTHWEST OF HULL TO
QUINCY TO WEYMOUTH TO COHASSET...OR ALONG A LINE EXTENDING FROM
BOSTON TO QUINCY TO WEYMOUTH...MOVING NORTHEAST AT 20 MPH.

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

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 4208 7090 4213 7098 4226 7106 4231 7104
      4232 7101 4235 7103 4232 7101 4233 7095
      4228 7101 4227 7099 4228 7096 4229 7098
      4231 7093 4233 7093 4231 7091 4234 7088
      4231 7088 4228 7085 4226 7076
TIME...MOT...LOC 2153Z 247DEG 16KT 4238 7096 4229 7099
          4224 7099 4221 7092 4219 7081

$$

SIPPRELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 3:22 PM EDT	Special Weather Statement	BOX	Franklin	38 min
Jun 23, 3:52 PM EDT	Special Weather Statement	BOX	Franklin	38 min
Jun 23, 4:23 PM EDT	Special Weather Statement	BOX	Essex	52 min
Jun 23, 4:30 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	35 min
Jun 23, 4:42 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Suffolk	48 min
Jun 23, 4:56 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Suffolk	49 min
Jun 23, 4:57 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	33 min
Jun 23, 5:01 PM EDT	Special Marine Warning	BOX		89 min
Jun 23, 5:09 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex, Norfolk, Suffolk	36 min
Jun 23, 5:19 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex, Norfolk, Plymouth, Suffolk	4 hr
Jun 23, 5:26 PM EDT	Severe Thunderstorm Warning	BOX	Bristol	35 min
Jun 23, 5:27 PM EDT	Special Marine Warning	BOX		33 min
Jun 23, 5:52 PM EDT	Special Marine Warning	BOX		30 min
Jun 23, 5:55 PM EDT	Special Marine Warning	BOX		65 min
Jun 23, 6:06 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Plymouth	39 min
Jun 23, 6:10 PM EDT	Severe Thunderstorm Warning	BOX	Bristol	31 min
Jun 23, 6:11 PM EDT	Special Marine Warning	BOX		26 min
Jun 23, 6:29 PM EDT	Special Weather Statement	BOX	Bristol, Plymouth	46 min
Jun 23, 6:35 PM EDT	Special Marine Warning	BOX		55 min
Jun 23, 6:45 PM EDT	Special Weather Statement	BOX	Barnstable, Dukes	90 min
Jun 23, 7:26 PM EDT	Special Marine Warning	BOX		40 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2012 Every severe thunderstorm warning in 2012

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.