Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 61, NWS Boston/Norton, MA

July 24, 2012Barnstable County, Plymouth County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 24, 2012, 4:23 PM EDT for Barnstable 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, 4:23 PM EDT (20:23 UTC)
Expired: Jul 24, 2012, 4:53 PM EDT
In force: 30 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Barnstable County, MA, Plymouth County, MA

The radar

The Boston radar (KBOX), 45 km from the middle of the area, began a volume at 20:25 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, 8.4 hours before the alert went out and 58 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.

681 
WUUS51 KBOX 242023
SVRBOX
MAC001-023-242130-
/O.NEW.KBOX.SV.W.0061.120724T2023Z-120724T2130Z/

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

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL BARNSTABLE COUNTY IN SOUTHEAST MASSACHUSETTS...
  EAST CENTRAL PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS...
  THIS INCLUDES THE CITY OF PLYMOUTH...

* UNTIL 530 PM EDT

* AT 421 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
  PLYMOUTH...AND WAS MOVING SOUTHEAST AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...BOURNE AND SANDWICH.

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 4169 7063 4196 7075 4199 7069 4197 7066
      4200 7064 4202 7061 4200 7060 4198 7064
      4195 7062 4196 7058 4193 7053 4191 7054
      4185 7052 4181 7053 4175 7041
TIME...MOT...LOC 2023Z 330DEG 30KT 4196 7067

$$

JWD

2 follow-up statements

000 
WWUS51 KBOX 242042
SVSBOX

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

MAC001-023-242130-
/O.CON.KBOX.SV.W.0061.000000T0000Z-120724T2130Z/
PLYMOUTH MA-BARNSTABLE MA-
442 PM EDT TUE JUL 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR WEST CENTRAL BARNSTABLE AND EAST CENTRAL PLYMOUTH COUNTIES...

AT 440 PM EDT...THE SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER 
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH...WAS LOCATED 8 
MILES NORTHWEST OF SANDWICH. THE STORM WAS MOVING SOUTHEAST AT 35 
MPH.

THE SEVERE THUNDERSTORM WILL REACH THE SAGAMORE BRIDGE BY 450 PM AND 
SANDWICH BY 5 PM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GET INDOORS WHEN THIS STORM APPROACHES. DO NOT DRIVE THROUGH FLOODED 
ROADS. 

&&

LAT...LON 4171 7055 4185 7063 4189 7064 4190 7062
      4192 7061 4192 7060 4190 7061 4192 7058
      4193 7056 4193 7055 4193 7053 4191 7054
      4185 7052 4181 7053 4175 7041
TIME...MOT...LOC 2041Z 330DEG 30KT 4183 7057

$$

JWD

412 
WWUS51 KBOX 242053
SVSBOX

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

MAC001-023-242103-
/O.CAN.KBOX.SV.W.0061.000000T0000Z-120724T2130Z/
PLYMOUTH MA-BARNSTABLE MA-
453 PM EDT TUE JUL 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL BARNSTABLE AND
EAST CENTRAL PLYMOUTH COUNTIES IS CANCELLED...

AT 453 PM...THE SEVERE THUNDERSTORM HAS WEAKENED AND MOVED OFFSHORE 
INTO CAPE COD BAY. 

MORE THUNDERSTORMS MAY FORM IN SOUTHEAST MASSACHUSETTS THROUGH THIS 
EVENING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM 
EDT.

&&

LAT...LON 4171 7055 4185 7063 4189 7064 4190 7062
      4192 7061 4192 7060 4190 7061 4192 7058
      4193 7056 4193 7055 4193 7053 4191 7054
      4185 7052 4181 7053 4175 7041
TIME...MOT...LOC 2053Z 330DEG 30KT 4174 7050

$$

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, 4:30 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, 5:00 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Plymouth	30 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.