Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 25, NWS Boston/Norton, MA

June 1, 2011Middlesex County, Norfolk County, Worcester County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 1, 2011, 8:58 PM EDT for Middlesex County, Norfolk County, Worcester County, Massachusetts. It was in force for 32 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
Jun 1, 2011, 8:58 PM EDT (00:58 UTC)
Expired
Jun 1, 2011, 9:30 PM EDT
In force
32 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon

Counties Middlesex County, MA, Norfolk County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 42 km from the middle of the area, began a volume at 00:59 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 1, 7:40 PM EDTTornado WatchSPC2 hr

The nearest sounding before it

Chatham, MA (KCHH), launched 00:00Z, 1.0 hours before the alert went out and 143 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 2011-06-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 801 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 00:00Z on 2011-06-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 213 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
801 J/kg
Mixed-layer CIN
-273 J/kg
Mixed-layer LCL
869 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
213 m²/s²
0-3 km storm-relative helicity
297 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.

360 
WUUS51 KBOX 020058
SVRBOX
MAC017-021-027-020145-
/O.NEW.KBOX.SV.W.0025.110602T0058Z-110602T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
858 PM EDT WED JUN 1 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  THIS INCLUDES THE CITY OF MILFORD...
  SOUTHERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
  THIS INCLUDES THE CITY OF FRANKLIN...
  EXTREME SOUTH CENTRAL MIDDLESEX COUNTY IN SOUTHEAST
  MASSACHUSETTS...

* UNTIL 945 PM EDT

* AT 854 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR SOUTHBRIDGE...OR 14 MILES
  NORTH OF PUTNAM...AND WAS MOVING EAST AT 50 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...WEBSTER...OXFORD...
  AUBURN...SUTTON...MILLBURY...DOUGLAS...GRAFTON...WHITINSVILLE...
  NORTHBRIDGE...UPTON...UXBRIDGE...MILLVILLE...MENDON...HOPEDALE...
  HOPKINTON...BELLINGHAM...HOLLISTON...MEDWAY...MILLIS...WRENTHAM...
  PLAINVILLE...NORFOLK...MEDFIELD...FOXBOROUGH...WALPOLE...
  WESTWOOD...NORWOOD...SHARON...STOUGHTON AND CANTON.

A TORNADO WATCH IS ALSO IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCED WARNING. REMAIN CALM...BUT TAKE
COVER NOW. GO TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY
BUILDING. AVOID WINDOWS.

&&

LAT...LON 4222 7208 4223 7106 4210 7107 4199 7135
      4199 7138 4202 7138 4201 7180 4203 7184
      4203 7207
TIME...MOT...LOC 0058Z 270DEG 43KT 4210 7193

$$

BELK
1 follow-up statement
494 
WWUS51 KBOX 020130
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
930 PM EDT WED JUN 1 2011

MAC017-021-027-020140-
/O.CAN.KBOX.SV.W.0025.000000T0000Z-110602T0145Z/
MIDDLESEX MA-WORCESTER MA-NORFOLK MA-
930 PM EDT WED JUN 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORFOLK...SOUTHEASTERN
WORCESTER AND EXTREME SOUTH CENTRAL MIDDLESEX COUNTIES IS
CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT WEDNESDAY EVENING
FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE
AND CENTRAL RHODE ISLAND.

LAT...LON 4222 7208 4223 7106 4210 7107 4199 7135
      4199 7138 4202 7138 4201 7180 4203 7184
      4203 7207
TIME...MOT...LOC 0130Z 270DEG 43KT 4210 7141

$$

BELK

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 1, 8:03 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Worcester27 min
Jun 1, 8:10 PM EDTSevere Thunderstorm WarningBOXHampden, Hampshire, Worcester44 min
Jun 1, 8:15 PM EDTSpecial Weather StatementBOXMiddlesex30 min
Jun 1, 8:22 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Norfolk, Worcester38 min
Jun 1, 8:39 PM EDTSpecial Weather StatementBOXEssex, Middlesex, Suffolk66 min
Jun 1, 8:47 PM EDTSpecial Marine WarningBOX58 min
Jun 1, 8:48 PM EDTSevere Thunderstorm WarningBOXBarnstable, Essex, Middlesex, Norfolk, Plymouth, Suffolk and 1 more42 min
Jun 1, 9:03 PM EDTSpecial Marine WarningBOX57 min
Jun 1, 9:22 PM EDTSpecial Weather StatementBOXDukes53 min
Jun 1, 9:34 PM EDTSpecial Marine WarningBOX56 min
Jun 1, 9:34 PM EDTSpecial Weather StatementBOXNorfolk, Suffolk56 min
Jun 1, 9:54 PM EDTSpecial Marine WarningBOX50 min
Jun 1, 9:58 PM EDTSpecial Marine WarningBOX62 min
Jun 1, 10:53 PM EDTSpecial Weather StatementBOXBarnstable37 min
Jun 1, 10:55 PM EDTSpecial Marine WarningBOX40 min
Jun 1, 11:49 PM EDTSpecial Marine WarningBOX26 min
Jun 1, 11:55 PM EDTSpecial Weather StatementBOXNantucket50 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 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.