Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 62, NWS Boston/Norton, MA

July 8, 2011Providence County, Rhode Island; Middlesex County, Worcester County, Massachusetts; Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 8, 2011, 6:41 AM EDT for Providence County, Rhode Island; Middlesex County, Worcester County, Massachusetts; Northeastern Connecticut Planning Region, Connecticut. It was in force for 38 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 8, 2011, 6:41 AM EDT (10:41 UTC)
Expired
Jul 8, 2011, 7:19 AM EDT
In force
38 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon

Counties Northeastern Connecticut Planning Region, CT, Middlesex County, MA, Worcester County, MA, Providence County, RI

The radar

The Boston radar (KBOX), 52 km from the middle of the area, began a volume at 10:40 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 00:00Z, 10.7 hours before the alert went out and 154 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 00:00Z on 2011-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2011-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1370 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
69 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.

452 
WUUS51 KBOX 081041
SVRBOX
CTC015-MAC017-027-RIC007-081130-
/O.NEW.KBOX.SV.W.0062.110708T1041Z-110708T1130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
641 AM EDT FRI JUL 8 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN PROVIDENCE COUNTY IN RHODE ISLAND...
  SOUTHEASTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  NORTHEASTERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  EXTREME SOUTHWESTERN MIDDLESEX COUNTY IN SOUTHEAST MASSACHUSETTS...

* UNTIL 730 AM EDT

* AT 635 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  DUDLEY...OR 9 MILES NORTHWEST OF PUTNAM...AND WAS MOVING EAST AT 20
  MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...WEBSTER...OXFORD...
  MILLBURY...SUTTON...DOUGLAS...WHITINSVILLE...NORTHBRIDGE...
  UXBRIDGE...UPTON AND MILLVILLE.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL...AS WELL
AS DEADLY LIGHTNING AND TORRENTIAL RAIN. GET TO SAFE SHELTER NOW...
INSIDE A STURDY BUILDING OR IN A VEHICLE. DO NOT SEEK SHELTER UNDER
TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING. DRIVERS SHOULD BE ALERT FOR PONDING OF WATER AND AVOID
FLOODED ROADS.

&&

LAT...LON 4223 7155 4195 7156 4197 7199 4213 7202
TIME...MOT...LOC 1041Z 262DEG 19KT 4204 7194

$$

SIPPRELL
2 follow-up statements
162 
WWUS51 KBOX 081058
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
658 AM EDT FRI JUL 8 2011

CTC015-MAC017-027-RIC007-081130-
/O.CON.KBOX.SV.W.0062.000000T0000Z-110708T1130Z/
WINDHAM CT-MIDDLESEX MA-WORCESTER MA-PROVIDENCE RI-
658 AM EDT FRI JUL 8 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 AM EDT
FOR NORTHWESTERN PROVIDENCE...SOUTHEASTERN WORCESTER...EXTREME
SOUTHWESTERN MIDDLESEX AND NORTHEASTERN WINDHAM COUNTIES...

AT 655 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR DOUGLAS...OR 10 MILES NORTHEAST OF PUTNAM...MOVING EAST
AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WHITINSVILLE...NORTHBRIDGE...UPTON...UXBRIDGE AND MILLVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 4216 7185 4223 7155 4195 7156 4196 7183
TIME...MOT...LOC 1058Z 265DEG 21KT 4203 7175

$$

SIPPRELL
524 
WWUS51 KBOX 081119
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
719 AM EDT FRI JUL 8 2011

CTC015-MAC017-027-RIC007-081127-
/O.CAN.KBOX.SV.W.0062.000000T0000Z-110708T1130Z/
WINDHAM CT-MIDDLESEX MA-WORCESTER MA-PROVIDENCE RI-
719 AM EDT FRI JUL 8 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN PROVIDENCE...
SOUTHEASTERN WORCESTER...EXTREME SOUTHWESTERN MIDDLESEX AND
NORTHEASTERN WINDHAM COUNTIES IS CANCELLED...

THE STORM HAS MOVED OUT OF THE WARNED AREA. A SEVERE THUNDERSTORM 
WARNING CONTINUES FOR AREAS EAST OF THE PREVIOUS WARNED AREA.

LAT...LON 4216 7185 4223 7155 4195 7156 4196 7183
TIME...MOT...LOC 1117Z 265DEG 21KT 4204 7160

$$

SIPPRELL

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 7:02 AM EDTSevere Thunderstorm WarningBOXProvidence34 min
Jul 8, 8:17 AM EDTSpecial Weather StatementBOXBristol, Kent58 min
Jul 8, 8:34 AM EDTAreal Flood AdvisoryBOXBristol, Kent, Newport, Providence, Washington71 min
Jul 8, 9:12 AM EDTAreal Flood AdvisoryBOXNewport2 hr
Jul 8, 11:28 AM EDTSpecial Weather StatementBOXProvidence62 min
Jul 8, 11:46 AM EDTAreal Flood AdvisoryBOXKent, Providence93 min
Jul 8, 5:03 AM EDTSpecial Weather StatementBOXHampshire42 min
Jul 8, 5:18 AM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire, Worcester42 min
Jul 8, 6:00 AM EDTSpecial Weather StatementBOXWorcester45 min
Jul 8, 6:34 AM EDTSpecial Weather StatementBOXWorcester56 min
Jul 8, 7:34 AM EDTSpecial Weather StatementBOXNorfolk41 min
Jul 8, 8:07 AM EDTSpecial Weather StatementBOXPlymouth53 min
Jul 8, 8:20 AM EDTAreal Flood AdvisoryBOXBristol, Norfolk, Plymouth3 hr
Jul 8, 8:39 AM EDTSpecial Weather StatementBOXHampden, Hampshire66 min
Jul 8, 8:57 AM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire, Worcester27 min
Jul 8, 9:50 AM EDTSpecial Marine WarningBOX25 min
Jul 8, 10:09 AM EDTSpecial Weather StatementBOXBarnstable66 min
Jul 8, 10:43 AM EDTAreal Flood AdvisoryBOXBarnstable94 min
Jul 8, 11:06 AM EDTSpecial Marine WarningBOX54 min
Jul 8, 11:53 AM EDTSpecial Marine WarningBOX67 min
Jul 8, 4:25 PM EDTAreal Flood AdvisoryBOXCapitol Planning Region, Northeastern Connecticut Planning Region6 hr

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2011Severe Thunderstorm Warnings in Rhode Island, 2011Severe Thunderstorm Warnings in Connecticut, 2011Every severe thunderstorm warning in 2011

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.