Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 39, NWS Boston/Norton, MA

July 3, 2014Essex County, Middlesex County, Suffolk County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 3, 2014, 10:37 PM EDT for Essex County, Middlesex County, Suffolk County, Massachusetts. It was in force for 23 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 3, 2014, 10:37 PM EDT (02:37 UTC)
Expired: Jul 3, 2014, 11:00 PM EDT
In force: 23 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

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

The radar

The Boston radar (KBOX), 53 km from the middle of the area, began a volume at 02:38 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 3, 10:48 PM EDT	TSTM WND DMG	Waltham, MA	TREE DOWN BLOCKING SHADE STREET.
Jul 3, 10:55 PM EDT	TSTM WND DMG	Chelsea, MA	TREES AND WIRES DOWN.
Jul 3, 10:56 PM EDT	TSTM WND DMG	Lynn, MA	TREES DOWN ON SOUTH COMMON STREET...SURFSIDE ROAD...WAVERLY STREET...LEIGHTON STREET...AND ORION STREET.
Jul 3, 10:56 PM EDT	TSTM WND DMG	Wakefield, MA	4-5 INCH DIAMETER LIMB DOWN BLOCKING MORRIS CIRCLE.
Jul 3, 10:58 PM EDT	TSTM WND DMG	Somerville, MA	TREES AND WIRES DOWN.
Jul 3, 10:58 PM EDT	TSTM WND DMG	Watertown, MA	TREES AND WIRES DOWN.
Jul 3, 11:05 PM EDT	TSTM WND DMG	Malden, MA	TREE AND WIRES DOWN.
Jul 3, 11:05 PM EDT	TSTM WND DMG	Saugus, MA	LARGE LIMB DOWN ON WALNUT STREET.
Jul 3, 11:09 PM EDT	TSTM WND DMG	Peabody, MA	LARGE BRANCH DOWN.
Jul 3, 11:09 PM EDT	TSTM WND DMG	Peabody, MA	TREE DOWN ON DRISCOLL STREET.

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

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 3, 2:12 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Chatham, MA (KCHH), launched 00:00Z, 2.6 hours before the alert went out and 121 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: 343 J/kg
Mixed-layer CIN: -253 J/kg
Mixed-layer LCL: 1006 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 62 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.

832 
WUUS51 KBOX 040237
SVRBOX
MAC009-017-025-040300-
/O.NEW.KBOX.SV.W.0039.140704T0237Z-140704T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
1037 PM EDT THU JUL 3 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN SUFFOLK COUNTY IN EASTERN MASSACHUSETTS...
  EAST CENTRAL MIDDLESEX COUNTY IN NORTHEAST MASSACHUSETTS...
  SOUTH CENTRAL ESSEX COUNTY IN NORTHEAST MASSACHUSETTS...

* UNTIL 1100 PM EDT

* AT 1037 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED OVER WESTON...OR NEAR WALTHAM...AND WAS MOVING
  NORTHEAST AT 50 MPH.

* SOME LOCATIONS IMPACTED INCLUDE...
  BOSTON...CAMBRIDGE...LYNN...NEWTON...SOMERVILLE...WALTHAM...
  MALDEN...MEDFORD...REVERE...PEABODY...ARLINGTON...EVERETT...
  SALEM...WOBURN...CHELSEA...NATICK...WATERTOWN...LEXINGTON...MELROSE
  AND SAUGUS.

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 4247 7091 4243 7093 4242 7090 4242 7094
      4246 7094 4239 7097 4238 7104 4239 7104
      4239 7107 4238 7105 4232 7134 4240 7141
      4259 7099
TIME...MOT...LOC 0237Z 244DEG 42KT 4238 7130 
$$
FIELD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 8:09 PM EDT	Flash Flood Warning	BOX	Hampden, Hampshire	3 hr
Jul 3, 8:16 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire, Worcester	59 min
Jul 3, 8:48 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Middlesex, Worcester	57 min
Jul 3, 8:59 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Worcester	46 min
Jul 3, 9:51 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Worcester	39 min
Jul 3, 10:13 PM EDT	Special Weather Statement	BOX	Middlesex, Suffolk	47 min
Jul 3, 10:40 PM EDT	Special Marine Warning	BOX		65 min
Jul 3, 10:54 PM EDT	Small Craft Advisory	BOX		47 hr
Jul 3, 10:55 PM EDT	Severe Thunderstorm Warning	BOX	Essex	35 min
Jul 3, 11:01 PM EDT	Special Marine Warning	BOX		59 min
Jul 3, 11:11 PM EDT	Hurricane Warning	BOX		30 hr
Jul 4, 4:48 AM EDT	Flash Flood Watch	BOX	Barnstable, Bristol, Dukes, Essex, Middlesex, Nantucket and 3 more	18 hr
Jul 4, 5:59 AM EDT	Hurricane Local Statement	BOX	Bristol, Dukes, Essex, Norfolk, Plymouth, Suffolk	23 hr
Jul 4, 12:29 PM EDT	Areal Flood Advisory	BOX	Bristol	2 hr
Jul 4, 1:21 PM EDT	Flash Flood Warning Emergency	BOX	Bristol, Plymouth	9 hr
Jul 4, 2:43 PM EDT	Areal Flood Advisory	BOX	Plymouth	2 hr
Jul 4, 2:56 PM EDT	Flash Flood Warning	BOX	Bristol	6 hr
Jul 4, 4:00 PM EDT	Flash Flood Warning	BOX	Barnstable, Plymouth	7 hr
Jul 4, 4:59 PM EDT	Areal Flood Advisory	BOX	Bristol, Norfolk, Plymouth, Suffolk	3 hr
Jul 4, 6:32 PM EDT	Areal Flood Advisory	BOX	Barnstable, Dukes, Nantucket	4 hr

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.