Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 124, NWS Boston/Norton, MA

September 11, 20166 counties in Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Sep 11, 2016, 9:53 AM EDT for 6 counties in Massachusetts. It was in force for 54 min. 11 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: Sep 11, 2016, 9:53 AM EDT (13:53 UTC)
Expired: Sep 11, 2016, 10:47 AM EDT
In force: 54 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Essex County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 73 km from the middle of the area, began a volume at 13:54 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
Sep 11, 9:55 AM EDT	TSTM WND DMG	Chelmsford, MA	TREES DOWN ON CHELMSFORD STREET WITH OTHER LARGE LIMBS DOWN IN TOWN
Sep 11, 9:55 AM EDT	TSTM WND DMG	Chelmsford, MA	TREES DOWN ON ROUTE 110 NEAR INTERSTATE 495
Sep 11, 9:55 AM EDT	TSTM WND DMG	Chelmsford, MA	WIND BLEW AN AC UNIT OFF ITS SUPPORT ON AN OFFICE ROOF...UNIT REMAINED ON THE ROOF
Sep 11, 10:00 AM EDT	TSTM WND DMG	Ashland, MA	TREE DOWN
Sep 11, 10:15 AM EDT	TSTM WND DMG	Newton, MA	TREE DOWN ON CAR ON WASHINGTON STREET
Sep 11, 10:15 AM EDT	TSTM WND DMG	Waltham, MA	TREES AND WIRES DOWN IN THE WARRENDALE SECTION OF THE CITY
Sep 11, 10:20 AM EDT	TSTM WND DMG	Amesbury, MA	TREE DOWN ON HOUSE ON ORCHARD STREET
Sep 11, 10:25 AM EDT	TSTM WND DMG	Concord, MA	TREES AND WIRES DOWN ON POWDER MILL AND SUDBURY ROADS
Sep 11, 10:25 AM EDT	TSTM WND DMG	Salisbury, MA	TREE DOWN ON HOUSE ON RABITT ROAD
Sep 11, 10:30 AM EDT	TSTM WND DMG	Newton, MA	TREE DOWN ON WABAN AVE BLOCKING ROAD
Sep 11, 10:32 AM EDT	TSTM WND DMG	Cambridge, MA	TREE DOWN ON CONCORD AVE AND TREE DOWN AT CONCORD AVE AND FRESH POND PARKWAY

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, 1.9 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: 1470 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: -26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

657 
WUUS51 KBOX 111353
SVRBOX
MAC009-017-021-023-025-027-111500-
/O.NEW.KBOX.SV.W.0124.160911T1353Z-160911T1500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
953 AM EDT SUN SEP 11 2016

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ESSEX COUNTY IN NORTHEASTERN MASSACHUSETTS...
  NORTHWESTERN PLYMOUTH COUNTY IN SOUTHEASTERN MASSACHUSETTS...
  NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
  SOUTHEASTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  SUFFOLK COUNTY IN EASTERN MASSACHUSETTS...
  MIDDLESEX COUNTY IN NORTHEASTERN MASSACHUSETTS...

* UNTIL 1100 AM EDT

* AT 952 AM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM TYNGSBOROUGH TO NEAR OXFORD...MOVING EAST AT 45 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  BOSTON...WORCESTER...LOWELL...CAMBRIDGE...BROCKTON...QUINCY...
  LYNN...NEWTON...LAWRENCE...SOMERVILLE...FRAMINGHAM...HAVERHILL...
  WALTHAM...MALDEN...BROOKLINE...MEDFORD...WEYMOUTH...REVERE...
  PEABODY AND METHUEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4287 7082 4280 7085 4282 7056 4279 7049
      4268 7040 4247 7055 4239 7068 4235 7064
      4208 7083 4207 7107 4209 7109 4203 7193
      4270 7150 4270 7129 4274 7124 4274 7118
      4281 7116 4281 7107 4286 7103 4289 7093
TIME...MOT...LOC 1352Z 263DEG 40KT 4267 7142 4210 7184 

HAIL...<.75IN
WIND...60MPH
 
$$

KJC

3 follow-up statements

446 
WWUS51 KBOX 111414
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
1014 AM EDT SUN SEP 11 2016

MAC027-111424-
/O.CAN.KBOX.SV.W.0124.000000T0000Z-160911T1500Z/
WORCESTER MA-
1014 AM EDT SUN SEP 11 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WORCESTER COUNTY
IS CANCELLED...

THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE WARNED
AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED.

LAT...LON 4287 7082 4282 7084 4281 7087 4280 7085
      4282 7056 4279 7049 4268 7040 4247 7055
      4239 7068 4235 7064 4208 7083 4207 7107
      4209 7109 4206 7150 4217 7148 4217 7150
      4280 7113 4281 7107 4286 7103 4289 7092
TIME...MOT...LOC 1414Z 263DEG 40KT 4270 7110 4213 7153 

$$

MAC009-017-021-023-025-111500-
/O.CON.KBOX.SV.W.0124.000000T0000Z-160911T1500Z/
ESSEX MA-PLYMOUTH MA-NORFOLK MA-SUFFOLK MA-MIDDLESEX MA-
1014 AM EDT SUN SEP 11 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 AM EDT
FOR ESSEX...NORTHWESTERN PLYMOUTH...NORFOLK...SUFFOLK AND EASTERN
MIDDLESEX COUNTIES...

AT 1014 AM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NORTH ANDOVER TO HOPEDALE...MOVING EAST AT 45 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
BOSTON...CAMBRIDGE...BROCKTON...QUINCY...LYNN...NEWTON...LAWRENCE...
SOMERVILLE...FRAMINGHAM...HAVERHILL...WALTHAM...MALDEN...BROOKLINE...
MEDFORD...WEYMOUTH...REVERE...PEABODY...METHUEN...
ARLINGTON AND EVERETT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4287 7082 4282 7084 4281 7087 4280 7085
      4282 7056 4279 7049 4268 7040 4247 7055
      4239 7068 4235 7064 4208 7083 4207 7107
      4209 7109 4206 7150 4217 7148 4217 7150
      4280 7113 4281 7107 4286 7103 4289 7092
TIME...MOT...LOC 1414Z 263DEG 40KT 4270 7110 4213 7153 

HAIL...<.75IN
WIND...60MPH
 
$$

KJC

410 
WWUS51 KBOX 111433
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
1033 AM EDT SUN SEP 11 2016

MAC017-111442-
/O.CAN.KBOX.SV.W.0124.000000T0000Z-160911T1500Z/
MIDDLESEX MA-
1033 AM EDT SUN SEP 11 2016

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

THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE WARNED
AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED.

LAT...LON 4279 7049 4268 7040 4247 7055 4239 7068
      4235 7064 4208 7083 4207 7107 4209 7109
      4208 7131 4246 7099 4281 7082 4280 7080
      4282 7057
TIME...MOT...LOC 1432Z 263DEG 40KT 4272 7084 4215 7127 

$$

MAC009-021-023-025-111500-
/O.CON.KBOX.SV.W.0124.000000T0000Z-160911T1500Z/
ESSEX MA-PLYMOUTH MA-NORFOLK MA-SUFFOLK MA-
1033 AM EDT SUN SEP 11 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 AM EDT
FOR EASTERN ESSEX...NORTHWESTERN PLYMOUTH...NORTHEASTERN NORFOLK AND
SUFFOLK COUNTIES...

AT 1032 AM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM IPSWICH TO WALPOLE...MOVING EAST AT 45 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
BOSTON...BROCKTON...QUINCY...LYNN...WEYMOUTH...REVERE...PEABODY...
SALEM...BEVERLY...BRAINTREE...CHELSEA...RANDOLPH...GLOUCESTER...
NORWOOD...MILTON...STOUGHTON...SAUGUS...DANVERS...DEDHAM AND WALPOLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4279 7049 4268 7040 4247 7055 4239 7068
      4235 7064 4208 7083 4207 7107 4209 7109
      4208 7131 4246 7099 4281 7082 4280 7080
      4282 7057
TIME...MOT...LOC 1432Z 263DEG 40KT 4272 7084 4215 7127 

HAIL...<.75IN
WIND...60MPH
 
$$

KJC

481 
WWUS51 KBOX 111447
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
1047 AM EDT SUN SEP 11 2016

MAC009-021-023-025-111457-
/O.CAN.KBOX.SV.W.0124.000000T0000Z-160911T1500Z/
ESSEX MA-PLYMOUTH MA-NORFOLK MA-SUFFOLK MA-
1047 AM EDT SUN SEP 11 2016

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ESSEX...NORTHWESTERN
PLYMOUTH...NORTHEASTERN NORFOLK AND SUFFOLK COUNTIES IS CANCELLED...
    
THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LIMITS...AND HAVE EXITED THE WARNED AREA. THEREFORE...THE WARNING HAS
BEEN CANCELLED.

LAT...LON 4279 7049 4268 7040 4247 7055 4239 7068
      4235 7064 4208 7083 4207 7107 4209 7109
      4208 7131 4246 7099 4281 7082 4280 7080
      4282 7057
TIME...MOT...LOC 1445Z 263DEG 40KT 4276 7035 4219 7078 

$$

KJC

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 7:45 AM EDT	Special Weather Statement	BOX	Franklin	60 min
Sep 11, 8:11 AM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire	49 min
Sep 11, 8:38 AM EDT	Special Weather Statement	BOX	Hampden, Hampshire, Worcester	52 min
Sep 11, 8:49 AM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire, Middlesex, Worcester	41 min
Sep 11, 9:23 AM EDT	Severe Thunderstorm Warning	BOX	Essex, Hampden, Hampshire, Middlesex, Worcester	52 min
Sep 11, 9:56 AM EDT	Special Marine Warning	BOX		94 min
Sep 11, 11:06 AM EDT	Special Weather Statement	BOX	Bristol	39 min
Sep 11, 11:17 AM EDT	Special Marine Warning	BOX		58 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2016 Every severe thunderstorm warning in 2016

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.