Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 4, NWS Boston/Norton, MA

May 26, 2011Franklin County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at May 26, 2011, 11:48 PM EDT for Franklin County, Hampshire County, Massachusetts. It was in force for 27 min. 2 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: May 26, 2011, 11:48 PM EDT (03:48 UTC)
Expired: May 27, 2011, 12:15 AM EDT
In force: 27 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Franklin County, MA, Hampshire County, MA

The radar

The Albany radar (KENX), 94 km from the middle of the area, began a volume at 03:48 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
May 27, 12:03 AM EDT	TSTM WND DMG	Worthington, MA	TREE DOWN ON RIVER ROAD
May 27, 12:08 AM EDT	HAIL 0.88	Worthington, MA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 3.8 hours before the alert went out and 77 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: 1789 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 1244 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 231 m²/s²
0-3 km storm-relative helicity: 267 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

952 
WUUS51 KBOX 270348
SVRBOX
MAC011-015-270415-
/O.NEW.KBOX.SV.W.0004.110527T0348Z-110527T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
1148 PM EDT THU MAY 26 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FRANKLIN COUNTY IN WESTERN MASSACHUSETTS...
  THIS INCLUDES THE CITY OF GREENFIELD...
  NORTHWESTERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 1215 AM EDT

* AT 1148 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 13 MILES NORTHWEST OF MONROE TO
  8 MILES WEST OF MIDDLEFIELD...OR ALONG A LINE EXTENDING FROM
  BENNINGTON TO 25 MILES SOUTH OF NORTH ADAMS...AND WAS MOVING
  NORTHEAST AT 60 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...EAST WINDSOR...
  WORTHINGTON...PLAINFIELD...ROWE...CUMMINGTON...CHARLEMONT...
  HAWLEY...CHESTERFIELD...HEATH...GOSHEN...BUCKLAND...ASHFIELD...
  WILLIAMSBURG...COLRAIN...SHELBURNE...CONWAY...WHATELY...
  SUNDERLAND...MONTAGUE...LEYDEN...LEVERETT...GILL...DEERFIELD AND
  BERNARDSTON.

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 4239 7302 4263 7296 4266 7296 4268 7299
      4270 7296 4270 7303 4274 7302 4273 7247
      4244 7247 4232 7288 4234 7290 4235 7295
      4230 7301 4233 7307 4239 7307
TIME...MOT...LOC 0348Z 243DEG 54KT 4283 7314 4233 7316

$$

KJC

1 follow-up statement

969 
WWUS51 KBOX 270406
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
1206 AM EDT FRI MAY 27 2011

MAC011-015-270415-
/O.CON.KBOX.SV.W.0004.000000T0000Z-110527T0415Z/
FRANKLIN MA-HAMPSHIRE MA-
1206 AM EDT FRI MAY 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT
FOR NORTHWESTERN HAMPSHIRE AND WESTERN FRANKLIN COUNTIES...

AT 1206 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM 14 MILES NORTH OF MONROE TO
CHESTERFIELD...OR ALONG A LINE EXTENDING FROM 10 MILES SOUTH OF
STRATTON TO 12 MILES NORTHWEST OF NORTHAMPTON...MOVING NORTHEAST AT
60 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
HEATH...GOSHEN...BUCKLAND...ASHFIELD...WILLIAMSBURG...WHATELY...
SUNDERLAND...SHELBURNE...MONTAGUE...LEYDEN...LEVERETT...GREENFIELD...
GILL...DEERFIELD...CONWAY...COLRAIN AND BERNARDSTON

LAT...LON 4239 7302 4263 7296 4266 7296 4268 7299
      4270 7296 4270 7303 4274 7302 4273 7247
      4244 7247 4232 7288 4234 7290 4235 7295
      4230 7301 4233 7307 4239 7307
TIME...MOT...LOC 0406Z 244DEG 54KT 4290 7285 4240 7288

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 8:07 PM EDT	Dense Fog Advisory	BOX	Barnstable, Bristol, Dukes, Nantucket, Norfolk, Plymouth	13 hr
May 26, 11:23 PM EDT	Special Weather Statement	BOX	Franklin	52 min
May 27, 12:14 AM EDT	Severe Thunderstorm Warning	BOX	Franklin, Middlesex, Worcester	34 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.