Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 76, NWS Boston/Norton, MA

July 28, 20144 counties in Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 28, 2014, 8:50 AM EDT for 4 counties in Massachusetts. It was in force for 40 min. 10 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: Jul 28, 2014, 8:50 AM EDT (12:50 UTC)
Expired: Jul 28, 2014, 9:30 AM EDT
In force: 40 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

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

The radar

The Boston radar (KBOX), 54 km from the middle of the area, began a volume at 12:52 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
Jul 28, 9:05 AM EDT	TSTM WND DMG	Needham, MA	NUMEROUS UPROOTED TREES AND POWER LINES DOWN ON COUNTRY WAY.
Jul 28, 9:15 AM EDT	TSTM WND DMG	Needham, MA	NUMEROUS TREES DOWN ON MOSELEY AVENUE.
Jul 28, 9:32 AM EDT	TORNADO	Chelsea, MA	WINDOW BLOWN OUT ON DUDLEY STREET
Jul 28, 9:35 AM EDT	TORNADO	Revere, MA	A COUPLE OF ROOF COLLAPSES ON CENTRAL AVE. GAS LEAK ON MILL STREET.
Jul 28, 9:35 AM EDT	TORNADO	Revere, MA	NUMEROUS TREES DOWN. TELEPHONE POLES DOWN ON BEECH TO SPRAGUE STREET AREAS. TREES AND WIRES DOWN ON COOLIDGE STREET.
Jul 28, 9:35 AM EDT	TORNADO	Revere, MA	PARK AVENUE IMPASSABLE DUE TO LIVE WIRES DOWN.
Jul 28, 9:35 AM EDT	TORNADO	Revere, MA	REVERE BEACH PARKWAY CLOSED TO TRAFFIC DUE TO MULTIPLE POWER LINES AND TREES DOWN.
Jul 28, 9:35 AM EDT	TORNADO	Revere, MA	TREE DOWN BLOCKING AMERICAN LEGION HIGHWAY AT ST. ANTHONYS CHUCH AND CLOSED.
Jul 28, 9:35 AM EDT	TORNADO	Revere, MA	NUMEROUS REPORTS OF A TORNADO ON ROUTE 16 AT EVERETT AVE. ON THE EVERETT CHELSEA REVERE LINE.
Jul 28, 9:35 AM EDT	TORNADO	Revere, MA	MALDEN STREET AND CARLSON AVENUE CLOSED DUE TO CARS OVERTURNED AND TREES DOWN.

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, 0.8 hours before the alert went out and 122 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: 454 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 709 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

985 
WUUS51 KBOX 281250
SVRBOX
MAC009-017-021-025-281330-
/O.NEW.KBOX.SV.W.0076.140728T1250Z-140728T1330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
850 AM EDT MON JUL 28 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN SUFFOLK COUNTY IN EASTERN MASSACHUSETTS...
  EASTERN MIDDLESEX COUNTY IN NORTHEAST MASSACHUSETTS...
  NORTHWESTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
  SOUTHWESTERN ESSEX COUNTY IN NORTHEAST MASSACHUSETTS...

* UNTIL 930 AM EDT

* AT 850 AM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED OVER NATICK...AND WAS MOVING NORTHEAST AT 30 MPH.

* SOME LOCATIONS IMPACTED INCLUDE...
  BOSTON...CAMBRIDGE...LYNN...NEWTON...SOMERVILLE...FRAMINGHAM...
  WALTHAM...MALDEN...BROOKLINE...MEDFORD...REVERE...PEABODY...
  ARLINGTON...EVERETT...SALEM...BILLERICA...BEVERLY...WOBURN...
  CHELSEA AND ANDOVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL. GO
INDOORS AND STAY AWAY FROM WINDOWS.  DRIVERS SHOULD PREPARE FOR LOW
VISIBILITY AND AVOID FLOODED ROADS.

&&

LAT...LON 4255 7087 4253 7087 4250 7089 4252 7084
      4244 7094 4246 7094 4244 7097 4236 7104
      4239 7104 4238 7105 4236 7105 4215 7131
      4227 7150 4267 7111
TIME...MOT...LOC 1250Z 222DEG 26KT 4227 7135 
$$

KJC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 8:25 PM EDT	Special Weather Statement	BOX	Hampden	50 min
Jul 28, 5:46 AM EDT	Special Weather Statement	BOX	Hampshire	59 min
Jul 28, 6:54 AM EDT	Severe Thunderstorm Warning	BOX	Franklin	51 min
Jul 28, 8:44 AM EDT	Special Weather Statement	BOX	Suffolk	46 min
Jul 28, 9:18 AM EDT	Areal Flood Advisory	BOX	Essex, Middlesex, Norfolk, Suffolk	57 min
Jul 28, 9:33 AM EDT	Flash Flood Warning	BOX	Essex, Middlesex, Suffolk	117 min
Jul 28, 9:44 AM EDT	Tornado Warning	BOX	Essex	25 min
Jul 28, 10:19 AM EDT	Special Marine Warning	BOX		41 min
Jul 28, 2:40 PM EDT	Special Weather Statement	BOX	Franklin	50 min
Jul 28, 3:32 PM EDT	Special Weather Statement	BOX	Franklin	43 min
Jul 28, 3:58 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	62 min
Jul 28, 4:00 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Worcester	47 min
Jul 28, 4:14 PM EDT	Areal Flood Advisory	BOX	Franklin, Worcester	2 hr
Jul 28, 4:17 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	43 min
Jul 28, 4:24 PM EDT	Tornado Warning	BOX	Hampden, Worcester	21 min
Jul 28, 5:43 PM EDT	Areal Flood Advisory	BOX	Franklin, Worcester	2 hr
Jul 28, 5:47 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	58 min
Jul 28, 5:48 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	34 min
Jul 28, 6:18 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex	117 min
Jul 28, 6:22 PM EDT	Severe Thunderstorm Warning	BOX	Essex	23 min
Jul 28, 6:43 PM EDT	Special Marine Warning	BOX		62 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2014 Every severe thunderstorm warning in 2014

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.