Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 23, NWS Boston/Norton, MA

June 23, 2012Essex County, Middlesex County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 23, 2012, 4:30 PM EDT for Essex County, Middlesex County, Massachusetts. It was in force for 35 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, 4:30 PM EDT (20:30 UTC)
Expired: Jun 23, 2012, 5:05 PM EDT
In force: 35 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Essex County, MA, Middlesex County, MA

The radar

The Boston radar (KBOX), 97 km from the middle of the area, began a volume at 20:31 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, 4:31 PM EDT	TSTM WND DMG	North Andover, MA	TREE AND WIRES DOWN ON SECOND AND MORRIS STREET... TREE DOWN ON RTE 114 EASTBOUND. 2 LARGE LIMBS DOWN BLOCKING AUTRAM ROAD
Jun 23, 4:38 PM EDT	TSTM WND DMG	Boxford, MA	TREE DOWN ON CAR BLOCKING LAKE SHORE ROAD. TREE AND WIRES DOWN ON GLENDALE ROAD
Jun 23, 4:50 PM EDT	HAIL 0.75	Boxford, MA

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

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 8.5 hours before the alert went out and 132 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1265 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -4 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.

589 
WUUS51 KBOX 232030
SVRBOX
MAC009-017-232115-
/O.NEW.KBOX.SV.W.0023.120623T2030Z-120623T2115Z/

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

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ESSEX COUNTY IN EASTERN MASSACHUSETTS...
  THIS INCLUDES THE CITIES OF...NEWBURYPORT...LAWRENCE...
  NORTHEASTERN MIDDLESEX COUNTY IN SOUTHEAST MASSACHUSETTS...

* UNTIL 515 PM EDT

* AT 427 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM NEWBURY TO NORTH ANDOVER TO 6 MILES SOUTHWEST OF ANDOVER...OR
  ALONG A LINE EXTENDING FROM 6 MILES WEST OF NEWBURYPORT TO LAWRENCE
  TO LOWELL...AND WAS MOVING EAST AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...AMESBURY...GEORGETOWN...
  SALISBURY...MIDDLETON...BOXFORD...TOPSFIELD AND ROWLEY.

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 4289 7088 4287 7085 4287 7083 4287 7081
      4275 7079 4258 7099 4264 7126 4282 7111
      4281 7107 4286 7103 4287 7097 4289 7092
TIME...MOT...LOC 2030Z 255DEG 16KT 4280 7098 4271 7106
          4262 7123

$$

SIPPRELL

2 follow-up statements

723 
WWUS51 KBOX 232047
SVSBOX

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

MAC017-232057-
/O.CAN.KBOX.SV.W.0023.000000T0000Z-120623T2115Z/
MIDDLESEX MA-
447 PM EDT SAT JUN 23 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIDDLESEX COUNTY
IS CANCELLED...

LAT...LON 4265 7113 4278 7110 4280 7106 4282 7100
      4284 7081 4275 7079 4258 7099
TIME...MOT...LOC 2047Z 255DEG 16KT 4282 7088 4273 7096
          4264 7113

$$

MAC009-232115-
/O.CON.KBOX.SV.W.0023.000000T0000Z-120623T2115Z/
ESSEX MA-
447 PM EDT SAT JUN 23 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHERN ESSEX COUNTY...

AT 444 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM NEWBURYPORT TO GEORGETOWN TO
NORTH ANDOVER...OR ALONG A LINE EXTENDING FROM NEWBURYPORT TO 8 MILES
SOUTHWEST OF NEWBURYPORT TO LAWRENCE...MOVING EAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SALISBURY...MIDDLETON...BOXFORD...TOPSFIELD AND ROWLEY

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 4265 7113 4278 7110 4280 7106 4282 7100
      4284 7081 4275 7079 4258 7099
TIME...MOT...LOC 2047Z 255DEG 16KT 4282 7088 4273 7096
          4264 7113

$$

SIPPRELL

974 
WWUS51 KBOX 232105
SVSBOX

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

MAC009-232115-
/O.CAN.KBOX.SV.W.0023.000000T0000Z-120623T2115Z/
ESSEX MA-
505 PM EDT SAT JUN 23 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ESSEX COUNTY IS
CANCELLED...

THE STORM HAS MOVED OUT OF THE WARNED AREA. 

LAT...LON 4265 7113 4278 7110 4280 7106 4282 7100
      4284 7081 4275 7079 4258 7099
TIME...MOT...LOC 2105Z 255DEG 16KT 4284 7077 4275 7085
          4266 7102

$$

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, 4:42 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, 5:22 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Plymouth, Suffolk	53 min
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.