Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 20, NWS Boston/Norton, MA

June 1, 20116 counties in Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 1, 2011, 7:57 PM EDT for 6 counties in Massachusetts. It was in force for 24 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, 7:57 PM EDT (23:57 UTC)
Expired: Jun 1, 2011, 8:21 PM EDT
In force: 24 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Bristol County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 32 km from the middle of the area, began a volume at 23:59 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.

Issued	Product	Office	Lasted
Jun 1, 7:40 PM EDT	Tornado Watch	SPC	2 hr

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 12.0 hours before the alert went out and 117 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1250 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 141 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.

554 
WUUS51 KBOX 012357
SVRBOX
MAC005-017-021-023-025-027-020100-
/O.NEW.KBOX.SV.W.0020.110601T2357Z-110602T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
757 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...
  NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
  THIS INCLUDES THE CITIES OF...WEYMOUTH...QUINCY...FRANKLIN...
  BROOKLINE...
  SOUTHERN SUFFOLK COUNTY IN EASTERN MASSACHUSETTS...
  THIS INCLUDES THE CITY OF BOSTON...
  EXTREME NORTH CENTRAL BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS...
  SOUTH CENTRAL MIDDLESEX COUNTY IN SOUTHEAST MASSACHUSETTS...
  NORTHWESTERN PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS...
  THIS INCLUDES THE CITY OF BROCKTON...

* UNTIL 900 PM EDT

* AT 754 PM 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
  UPTON...OR NEAR MILFORD...AND WAS MOVING EAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...HOPKINTON...BELLINGHAM...
  ASHLAND...HOLLISTON...MEDWAY...SHERBORN...MILLIS...NATICK...
  NORFOLK...MEDFIELD...WELLESLEY...DOVER...WALPOLE...NEEDHAM...
  WESTWOOD...NORWOOD...SHARON...DEDHAM...CANTON...STOUGHTON...
  MILTON...RANDOLPH...AVON...HOLBROOK...BRAINTREE...ABINGTON...
  WHITMAN AND ROCKLAND.

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.

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 4207 7164 4227 7168 4234 7101 4233 7101
      4233 7099 4231 7098 4228 7101 4227 7099
      4228 7096 4208 7083
TIME...MOT...LOC 2356Z 263DEG 36KT 4217 7154

$$

DOODY

1 follow-up statement

871 
WWUS51 KBOX 020021
SVSBOX

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

MAC005-017-021-023-025-027-020032-
/O.CAN.KBOX.SV.W.0020.000000T0000Z-110602T0100Z/
MIDDLESEX MA-WORCESTER MA-NORFOLK MA-PLYMOUTH MA-BRISTOL MA-
SUFFOLK MA-
821 PM EDT WED JUN 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WORCESTER COUNTY
IN CENTRAL MASSACHUSETTS...AND SOUTHERN SUFFOLK AND NORFOLK COUNTIES
IN EASTERN MASSACHUSETTS...AND EXTREME NORTH CENTRAL BRISTOL...
NORTHWESTERN PLYMOUTH AND SOUTH CENTRAL MIDDLESEX COUNTIES IN
SOUTHEAST MASSACHUSETTS 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 4207 7164 4227 7168 4234 7101 4233 7101
      4233 7099 4231 7098 4228 7101 4227 7099
      4228 7096 4208 7083
TIME...MOT...LOC 0022Z 263DEG 36KT 4220 7119

$$

BELK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 8:25 AM EDT	Special Weather Statement	BOX	Middlesex	50 min
Jun 1, 8:32 AM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	43 min
Jun 1, 8:48 AM EDT	Special Weather Statement	BOX	Suffolk	42 min
Jun 1, 8:50 AM EDT	Special Marine Warning	BOX		71 min
Jun 1, 8:55 AM EDT	Special Weather Statement	BOX	Bristol	50 min
Jun 1, 9:12 AM EDT	Special Weather Statement	BOX	Plymouth	48 min
Jun 1, 9:40 AM EDT	Special Marine Warning	BOX		50 min
Jun 1, 9:41 AM EDT	Special Marine Warning	BOX		64 min
Jun 1, 10:00 AM EDT	Special Marine Warning	BOX		39 min
Jun 1, 10:22 AM EDT	Special Weather Statement	BOX	Barnstable	38 min
Jun 1, 10:36 AM EDT	Special Marine Warning	BOX		54 min
Jun 1, 2:37 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire	53 min
Jun 1, 2:58 PM EDT	Special Weather Statement	BOX	Hampshire	62 min
Jun 1, 3:09 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire, Worcester	51 min
Jun 1, 3:28 PM EDT	Tornado Warning	BOX	Franklin, Hampden, Hampshire	32 min
Jun 1, 3:32 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Middlesex, Worcester	40 min
Jun 1, 3:56 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire	3 hr
Jun 1, 4:05 PM EDT	Tornado Warning	BOX	Franklin, Hampden, Hampshire, Worcester	40 min
Jun 1, 4:15 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire, Worcester	3 hr
Jun 1, 4:18 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire, Worcester	42 min
Jun 1, 4:30 PM EDT	Tornado Warning	BOX	Hampden, Hampshire, Worcester	45 min
Jun 1, 4:44 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire, Middlesex, Norfolk, Worcester	61 min
Jun 1, 4:51 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampshire, Worcester	3 hr
Jun 1, 5:01 PM EDT	Tornado Warning	BOX	Franklin, Hampden, Hampshire, Middlesex, Norfolk, Worcester	44 min
Jun 1, 5:06 PM EDT	Areal Flood Advisory	BOX	Hampden, Worcester	3 hr
Jun 1, 5:17 PM EDT	Flash Flood Warning	BOX	Middlesex, Worcester	3 hr
Jun 1, 5:17 PM EDT	Tornado Warning	BOX	Hampden, Norfolk, Worcester	29 min
Jun 1, 5:38 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Norfolk, Worcester	67 min
Jun 1, 5:46 PM EDT	Tornado Warning	BOX	Middlesex, Norfolk, Worcester	44 min
Jun 1, 5:49 PM EDT	Flash Flood Warning	BOX	Bristol, Middlesex, Norfolk, Worcester	3 hr
Jun 1, 5:54 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	52 min
Jun 1, 5:57 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire, Worcester	26 min
Jun 1, 6:00 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	45 min
Jun 1, 6:07 PM EDT	Tornado Warning	BOX	Hampden, Hampshire, Worcester	53 min
Jun 1, 6:20 PM EDT	Special Marine Warning	BOX		28 min
Jun 1, 6:29 PM EDT	Areal Flood Advisory	BOX	Bristol, Norfolk, Plymouth, Suffolk	2 hr
Jun 1, 6:31 PM EDT	Special Weather Statement	BOX	Norfolk	59 min
Jun 1, 6:44 PM EDT	Special Weather Statement	BOX	Bristol, Plymouth	61 min
Jun 1, 6:44 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Middlesex, Worcester	30 min
Jun 1, 6:57 PM EDT	Tornado Warning	BOX	Hampden, Worcester	63 min
Jun 1, 7:12 PM EDT	Tornado Warning	BOX	Franklin, Middlesex, Worcester	48 min
Jun 1, 7:14 PM EDT	Special Marine Warning	BOX		91 min
Jun 1, 7:15 PM EDT	Areal Flood Advisory	BOX	Franklin, Middlesex, Worcester	104 min
Jun 1, 7:55 PM EDT	Special Weather Statement	BOX	Bristol	35 min
Jun 1, 7:56 PM EDT	Special Weather Statement	BOX	Hampden	34 min
Jun 1, 7:59 PM EDT	Areal Flood Advisory	BOX	Hampden, Hampshire, Worcester	66 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2011 Every 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.