Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 62, NWS Boston/Norton, MA

July 24, 2012Bristol County, Plymouth County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 24, 2012, 5:00 PM EDT for Bristol County, Plymouth County, Massachusetts. It was in force for 30 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: Jul 24, 2012, 5:00 PM EDT (21:00 UTC)
Expired: Jul 24, 2012, 5:30 PM EDT
In force: 30 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Bristol County, MA, Plymouth County, MA

The radar

The Boston radar (KBOX), 42 km from the middle of the area, began a volume at 20:59 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 24, 1:38 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 9.0 hours before the alert went out and 65 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: 313 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 967 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 142 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.

234 
WUUS51 KBOX 242100
SVRBOX
MAC005-023-242130-
/O.NEW.KBOX.SV.W.0062.120724T2100Z-120724T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
500 PM EDT TUE JUL 24 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS...
  SOUTHERN PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS...

* UNTIL 530 PM EDT

* AT 455 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   
  CARVER...AND WAS MOVING SOUTHEAST AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...ROCHESTER...WAREHAM...
  MARION AND MATTAPOISETT.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT LIGHTNING WAS
OCCURRING WITH THIS STORM. GET INDOORS OR INSIDE A VEHICLE NOW! DO
NOT SEEK SHELTER UNDER TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 4161 7080 4184 7098 4192 7074 4177 7062
      4172 7067 4172 7071 4167 7071 4167 7072
      4168 7074 4164 7076 4164 7080
TIME...MOT...LOC 2100Z 329DEG 31KT 4181 7081

$$

JWD

2 follow-up statements

862 
WWUS51 KBOX 242110
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
510 PM EDT TUE JUL 24 2012

MAC005-023-242130-
/O.CON.KBOX.SV.W.0062.000000T0000Z-120724T2130Z/
PLYMOUTH MA-BRISTOL MA-
510 PM EDT TUE JUL 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR EXTREME EAST CENTRAL BRISTOL AND SOUTHERN PLYMOUTH COUNTIES IN
SOUTHEAST MASSACHUSETTS...

AT 508 PM EDT...THE SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER 
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH...WAS LOCATED 
NEAR WAREHAM...AND WAS MOVING SOUTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MARION 
AND MATTAPOISETT.

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 4161 7080 4184 7098 4192 7074 4177 7062
      4172 7067 4172 7071 4167 7071 4167 7072
      4168 7074 4164 7076 4164 7080
TIME...MOT...LOC 2109Z 327DEG 27KT 4176 7077

$$

JWD

442 
WWUS51 KBOX 242123
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
523 PM EDT TUE JUL 24 2012

MAC005-023-242132-
/O.EXP.KBOX.SV.W.0062.000000T0000Z-120724T2130Z/
PLYMOUTH MA-BRISTOL MA-
523 PM EDT TUE JUL 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME EAST CENTRAL BRISTOL
AND SOUTHERN PLYMOUTH COUNTIES IN SOUTHEAST MASSACHUSETTS WILL EXPIRE
AT 530 PM EDT...

AT 522 PM...THE SEVERE THUNDERSTORM WAS LOCATED NEAR MATTAPOISETT 
AND HAS THE POTENTIAL TO PRODUCE QUARTER SIZED HAIL. IT WILL MOVE 
OFF THE COAST INTO BUZZARDS BAY BY 530 PM.

&&

LAT...LON 4161 7080 4184 7098 4192 7074 4177 7062
      4172 7067 4172 7071 4167 7071 4167 7072
      4168 7074 4164 7076 4164 7080
TIME...MOT...LOC 2122Z 327DEG 27KT 4168 7070

$$

JWD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 2:56 AM EDT	Special Weather Statement	BOX	Hampden	49 min
Jul 24, 4:19 AM EDT	Special Weather Statement	BOX	Norfolk	41 min
Jul 24, 12:50 PM EDT	Special Marine Warning	BOX		55 min
Jul 24, 1:23 PM EDT	Special Weather Statement	BOX	Essex	52 min
Jul 24, 1:34 PM EDT	Special Marine Warning	BOX		86 min
Jul 24, 1:56 PM EDT	Special Weather Statement	BOX	Essex, Franklin, Hampden, Hampshire, Middlesex, Norfolk and 3 more	79 min
Jul 24, 2:02 PM EDT	Special Weather Statement	BOX	Worcester	58 min
Jul 24, 2:12 PM EDT	Special Weather Statement	BOX	Franklin	63 min
Jul 24, 2:21 PM EDT	Special Weather Statement	BOX	Essex	54 min
Jul 24, 2:33 PM EDT	Special Weather Statement	BOX	Worcester	57 min
Jul 24, 2:38 PM EDT	Special Marine Warning	BOX		82 min
Jul 24, 2:54 PM EDT	Special Weather Statement	BOX	Suffolk	51 min
Jul 24, 2:57 PM EDT	Special Weather Statement	BOX	Worcester	63 min
Jul 24, 3:07 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire, Middlesex, Norfolk, Worcester	36 min
Jul 24, 3:08 PM EDT	Special Marine Warning	BOX		52 min
Jul 24, 3:38 PM EDT	Special Marine Warning	BOX		52 min
Jul 24, 3:40 PM EDT	Small Craft Advisory	BOX		20 hr
Jul 24, 3:51 PM EDT	Special Weather Statement	BOX	Plymouth	54 min
Jul 24, 3:57 PM EDT	Special Weather Statement	BOX	Hampden, Hampshire	63 min
Jul 24, 4:23 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Plymouth	30 min
Jul 24, 4:30 PM EDT	Special Weather Statement	BOX	Plymouth	30 min
Jul 24, 4:39 PM EDT	Special Marine Warning	BOX		66 min
Jul 24, 4:52 PM EDT	Special Weather Statement	BOX	Plymouth	53 min
Jul 24, 5:04 PM EDT	Special Marine Warning	BOX		41 min
Jul 24, 5:16 PM EDT	Special Marine Warning	BOX		59 min
Jul 24, 5:19 PM EDT	Special Weather Statement	BOX	Dukes	56 min
Jul 24, 5:37 PM EDT	Special Weather Statement	BOX	Barnstable, Dukes, Nantucket	53 min
Jul 24, 5:41 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Dukes	37 min
Jul 24, 5:59 PM EDT	Special Marine Warning	BOX		61 min
Jul 24, 6:24 PM EDT	Special Weather Statement	BOX	Norfolk	36 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.