Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 44, NWS Boston/Norton, MA

July 18, 2016Middlesex County, Norfolk County, Suffolk County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 18, 2016, 4:14 PM EDT for Middlesex County, Norfolk County, Suffolk County, Massachusetts. It was in force for 46 min. 15 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 18, 2016, 4:14 PM EDT (20:14 UTC)
Expired: Jul 18, 2016, 5:00 PM EDT
In force: 46 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Boston radar (KBOX), 39 km from the middle of the area, began a volume at 20:16 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 18, 4:27 PM EDT	TSTM WND DMG	Wellesley, MA	TREE DOWN ON HOUSE ON DEWEY PATH. TREE DOWN AND BROKEN UTILITY POLE ON WESTON ROAD.
Jul 18, 4:27 PM EDT	TSTM WND DMG	Wellesley, MA	TREE DOWN ON ROUTE 16 BY WELLESLEY COLLEGE. TREE DOWN AND NUMEROUS BRANCHES OF VARYING SIZE DOWN ON BROOKE STREET. LARGE BRANCH DOWN AND BLOCKING LATEN ROAD.
Jul 18, 4:30 PM EDT	TSTM WND DMG	Needham, MA	TREE AND WIRES DOWN ON HOOVER STREET
Jul 18, 4:39 PM EDT	TSTM WND DMG	Boston, MA	POWER LINES DOWN ON WELD STREET AT GARNET ROAD. POWER LINES DOWN ON BEECH STREET.
Jul 18, 4:39 PM EDT	TSTM WND DMG	Jamaica Plain, MA	TREE DOWN ACROSS ROAD ON TOWER AVENUE.
Jul 18, 4:39 PM EDT	TSTM WND DMG	Mattapan, MA	TREE DOWN ON LRONA ROAD.
Jul 18, 4:40 PM EDT	TSTM WND DMG	Dorchester, MA	TREE DOWN ON BICKNELL AND HARBOT STREETS.
Jul 18, 4:40 PM EDT	TSTM WND DMG	West Roxbury, MA	2 LARGE TREES DOWN.
Jul 18, 4:42 PM EDT	TSTM WND DMG	Boston, MA	UTILITY POLE DOWN ON WASHINGTON STREET AT NEW WASHINGTON.
Jul 18, 4:45 PM EDT	TSTM WND DMG	Boston, MA	TREE INTO HOUSE ON WARNER STREET.
Jul 18, 4:47 PM EDT	TSTM WND DMG	Quincy, MA	EXTENSIVE NUMBER OF TREES DOWNED.
Jul 18, 4:47 PM EDT	TSTM WND DMG	Quincy, MA	EXTENSIVE TREES DOWN.
Jul 18, 4:50 PM EDT	TSTM WND DMG	Weymouth, MA	MULTIPLE TREES AND WIRES DOWN ON LOVELL ST. TREE AND WIRES DOWN ON WESSAGUSSET RD. TREE DOWN ON SQUANTO RD. LIMBS DOWN ON RIVER ST. PAST THE BEACH. A BOAT BROKE FREE OF ITS MOORING ON LANE BEACH. TREE AND BRANCHES DOWN ON SEA ST. TREE INTO A HOUSE ON MIDDLE ST
Jul 18, 4:52 PM EDT	TSTM WND DMG	Boston, MA	TREE DOWN BLOCKING LA GRANGE STREET.
Jul 18, 5:00 PM EDT	TSTM WND DMG	Weymouth, MA	SMALL BOAT FLIPPED OVER JUST OFFSHORE NEAR RIVER STREET IN WEYMOUTH.

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 18, 12:05 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 8.2 hours before the alert went out and 112 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: 18 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 1097 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

649 
WUUS51 KBOX 182014
SVRBOX
MAC017-021-025-182100-
/O.NEW.KBOX.SV.W.0044.160718T2014Z-160718T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
414 PM EDT MON JUL 18 2016

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
  SUFFOLK COUNTY IN EASTERN MASSACHUSETTS...
  SOUTHEASTERN MIDDLESEX COUNTY IN NORTHEASTERN MASSACHUSETTS...

* UNTIL 500 PM EDT

* AT 414 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER NATICK...
  MOVING EAST AT 40 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  BOSTON...QUINCY...NEWTON...FRAMINGHAM...BROOKLINE...WEYMOUTH...
  BRAINTREE...NATICK...RANDOLPH...NEEDHAM...NORWOOD...WELLESLEY...
  MILTON...DEDHAM...WALPOLE...HINGHAM...CANTON...WINTHROP...
  ASHLAND AND WESTWOOD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4234 7102 4235 7095 4230 7105 4231 7097
      4229 7102 4226 7097 4234 7088 4226 7096
      4225 7096 4227 7092 4219 7092 4219 7144
      4231 7142 4235 7103 4238 7097
TIME...MOT...LOC 2014Z 263DEG 33KT 4226 7135 

HAIL...1.00IN
WIND...60MPH
 
$$
FIELD

1 follow-up statement

062 
WWUS51 KBOX 182025
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
425 PM EDT MON JUL 18 2016

MAC017-182033-
/O.CAN.KBOX.SV.W.0044.000000T0000Z-160718T2100Z/
MIDDLESEX MA-
425 PM EDT MON JUL 18 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MIDDLESEX COUNTY
IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED EAST OF
THE WARNED AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED FOR
SOUTHEASTERN MIDDLESEX COUNTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FOR
EASTERN...NORTHEASTERN AND SOUTHEASTERN MASSACHUSETTS.

LAT...LON 4234 7101 4235 7096 4230 7105 4230 7099
      4229 7102 4226 7097 4234 7088 4226 7096
      4225 7096 4227 7092 4219 7092 4219 7136
      4225 7130 4231 7133 4232 7124 4228 7119
      4233 7116 4237 7098
TIME...MOT...LOC 2023Z 072DEG 2KT 4227 7127 

$$

MAC021-025-182100-
/O.CON.KBOX.SV.W.0044.000000T0000Z-160718T2100Z/
NORFOLK MA-SUFFOLK MA-
425 PM EDT MON JUL 18 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR NORTHEASTERN NORFOLK AND SOUTHWESTERN SUFFOLK COUNTIES...

AT 423 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER NEEDHAM...AND
WAS MOVING TO THE EAST-SOUTHEAST AT 35 MPH.

HAZARD...60 MPH WIND GUSTS AND NICKEL SIZE HAIL. 

SOURCE...RADAR INDICATED. 

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

LOCATIONS IMPACTED INCLUDE...
BOSTON...QUINCY...NEWTON...BROOKLINE...WEYMOUTH...BRAINTREE...
RANDOLPH...NEEDHAM...NORWOOD...WELLESLEY...MILTON...DEDHAM...
WALPOLE...HINGHAM...CANTON...WESTWOOD...MEDFIELD...HULL...
MILLIS AND DOVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4234 7101 4235 7096 4230 7105 4230 7099
      4229 7102 4226 7097 4234 7088 4226 7096
      4225 7096 4227 7092 4219 7092 4219 7136
      4225 7130 4231 7133 4232 7124 4228 7119
      4233 7116 4237 7098
TIME...MOT...LOC 2023Z 072DEG 2KT 4227 7127 

HAIL...0.88IN
WIND...60MPH
 
$$
FIELD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 1:22 PM EDT	Special Weather Statement	BOX	Franklin	38 min
Jul 18, 1:42 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire	48 min
Jul 18, 2:18 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	27 min
Jul 18, 2:30 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	45 min
Jul 18, 2:56 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	34 min
Jul 18, 3:08 PM EDT	Special Weather Statement	BOX	Essex	37 min
Jul 18, 3:17 PM EDT	Severe Thunderstorm Warning	BOX	Essex	28 min
Jul 18, 3:31 PM EDT	Special Weather Statement	BOX	Middlesex	29 min
Jul 18, 3:53 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Suffolk	52 min
Jul 18, 4:08 PM EDT	Special Marine Warning	BOX		52 min
Jul 18, 4:31 PM EDT	Special Marine Warning	BOX		59 min
Jul 18, 4:34 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Plymouth, Suffolk	41 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.