Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 32, NWS Boston/Norton, MA

July 17, 2016Bristol County, Norfolk County, Plymouth County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 17, 2016, 2:46 PM EDT for Bristol County, Norfolk County, Plymouth County, Massachusetts. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 17, 2016, 2:46 PM EDT (18:46 UTC)
Expired
Jul 17, 2016, 3:30 PM EDT
In force
44 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Bristol County, MA, Norfolk County, MA, Plymouth County, MA

The radar

The Boston radar (KBOX), 6 km from the middle of the area, began a volume at 18:49 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.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 6.8 hours before the alert went out and 104 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-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 2016-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 460 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2016-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
460 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
640 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

100 
WUUS51 KBOX 171846
SVRBOX
MAC005-021-023-171930-
/O.NEW.KBOX.SV.W.0032.160717T1846Z-160717T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
246 PM EDT SUN JUL 17 2016

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN BRISTOL COUNTY IN SOUTHEASTERN MASSACHUSETTS...
  WEST CENTRAL PLYMOUTH COUNTY IN SOUTHEASTERN MASSACHUSETTS...
  SOUTHEASTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...

* UNTIL 330 PM EDT

* AT 246 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
  MANSFIELD...OR 8 MILES NORTHWEST OF TAUNTON...MOVING EAST AT 20
  MPH.

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

  SOURCE...RADAR INDICATED. 

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

* LOCATIONS IMPACTED INCLUDE...
  BROCKTON...TAUNTON...NORTH ATTLEBOROUGH...STOUGHTON...
  BRIDGEWATER...ATTLEBORO...MANSFIELD...EASTON...NORTON...SHARON...
  FOXBOROUGH...ABINGTON...WHITMAN...EAST BRIDGEWATER...RAYNHAM...
  WRENTHAM...HOLBROOK...PLAINVILLE...WEST BRIDGEWATER AND AVON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4194 7124 4205 7133 4214 7098 4196 7091
TIME...MOT...LOC 1846Z 259DEG 17KT 4201 7117 

HAIL...0.75IN
WIND...60MPH
 
$$

FRANK
1 follow-up statement
812 
WWUS51 KBOX 171900
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
300 PM EDT SUN JUL 17 2016

MAC021-171909-
/O.CAN.KBOX.SV.W.0032.000000T0000Z-160717T1930Z/
NORFOLK MA-
300 PM EDT SUN JUL 17 2016

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

LAT...LON 4194 7124 4201 7128 4212 7097 4196 7091
TIME...MOT...LOC 1859Z 262DEG 32KT 4196 7116 

$$

MAC005-023-171930-
/O.CON.KBOX.SV.W.0032.000000T0000Z-160717T1930Z/
BRISTOL MA-PLYMOUTH MA-
300 PM EDT SUN JUL 17 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR NORTH CENTRAL BRISTOL AND WEST CENTRAL PLYMOUTH COUNTIES...

AT 259 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER NORTON...OR
NEAR TAUNTON...MOVING EAST AT 35 MPH.

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

SOURCE...RADAR INDICATED. 

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

LOCATIONS IMPACTED INCLUDE...
BROCKTON...TAUNTON...BRIDGEWATER...ATTLEBORO...MANSFIELD...EASTON...
NORTON...ABINGTON...WHITMAN...EAST BRIDGEWATER...
RAYNHAM AND WEST BRIDGEWATER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4194 7124 4201 7128 4212 7097 4196 7091
TIME...MOT...LOC 1859Z 262DEG 32KT 4196 7116 

HAIL...0.75IN
WIND...60MPH
 
$$

FRANK

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 10:02 PM EDTSpecial Weather StatementBOXHampshire43 min
Jul 17, 3:28 AM EDTSmall Craft AdvisoryBOX49 hr
Jul 17, 1:54 PM EDTSpecial Weather StatementBOXNorfolk36 min
Jul 17, 2:20 PM EDTSpecial Weather StatementBOXNorfolk40 min
Jul 17, 2:33 PM EDTAreal Flood AdvisoryBOXBristol, Norfolk57 min
Jul 17, 3:07 PM EDTAreal Flood AdvisoryBOXBristol, Plymouth113 min
Jul 17, 3:07 PM EDTSevere Thunderstorm WarningBOXBristol, Plymouth38 min
Jul 17, 3:32 PM EDTAreal Flood AdvisoryBOXPlymouth58 min
Jul 17, 3:34 PM EDTSpecial Marine WarningBOX56 min
Jul 17, 3:43 PM EDTSevere Thunderstorm WarningBOXPlymouth37 min
Jul 17, 4:15 PM EDTSpecial Weather StatementBOXBristol45 min
Jul 17, 5:57 PM EDTSpecial Marine WarningBOX63 min
Jul 17, 6:17 PM EDTSevere Thunderstorm WarningBOXBristol43 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2016Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.