Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 11, NWS Boston/Norton, MA

May 29, 2012Franklin County, Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at May 29, 2012, 5:59 PM EDT for Franklin County, Hampden County, Hampshire County, Massachusetts. It was in force for 61 min. 1 report 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 29, 2012, 5:59 PM EDT (21:59 UTC)
Expired: May 29, 2012, 7:00 PM EDT
In force: 61 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Franklin County, MA, Hampden County, MA, Hampshire County, MA

The radar

The Albany radar (KENX), 90 km from the middle of the area, began a volume at 22:00 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 29, 6:29 PM EDT	TSTM WND DMG	Goshen, MA	TREES AND WIRES DOWN ON SPRUCE CORNER ROAD

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

The watch it was issued in

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

Issued	Product	Office	Lasted
May 29, 3:44 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 10.0 hours before the alert went out and 74 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: 1908 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 1026 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

068 
WUUS51 KBOX 292159
SVRBOX
MAC011-013-015-292300-
/O.NEW.KBOX.SV.W.0011.120529T2159Z-120529T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
559 PM EDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN FRANKLIN COUNTY IN WESTERN MASSACHUSETTS...
  NORTHWESTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...
  WESTERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 700 PM EDT

* AT 555 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 ROWE TO CHESTER...OR ALONG A
  LINE EXTENDING FROM 10 MILES EAST OF NORTH ADAMS TO 18 MILES NORTH
  OF HARTLAND...AND WAS MOVING EAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...WORTHINGTON...HAWLEY...
  CUMMINGTON...HEATH...BLANDFORD...CHESTERFIELD...BUCKLAND...
  HUNTINGTON...ASHFIELD...GOSHEN...RUSSELL...COLRAIN...MONTGOMERY...
  WESTHAMPTON...SHELBURNE...CONWAY AND WILLIAMSBURG.

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 4266 7299
      4268 7299 4270 7296 4270 7303 4274 7302
      4273 7261 4211 7277 4215 7304 4230 7301
      4233 7307 4239 7307
TIME...MOT...LOC 2159Z 270DEG 28KT 4269 7288 4225 7301

$$

FRANK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 3:59 AM EDT	Small Craft Advisory for Hazardous Seas	BOX		36 hr
May 29, 6:30 AM EDT	Dense Fog Advisory	BOX	Barnstable, Bristol, Dukes, Essex, Nantucket, Norfolk and 2 more	4 hr
May 29, 6:34 PM EDT	Special Weather Statement	BOX	Franklin, Hampden, Hampshire	56 min
May 29, 6:39 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire, Worcester	66 min
May 29, 7:49 PM EDT	Special Weather Statement	BOX	Franklin, Hampden, Hampshire	56 min
May 29, 7:57 PM EDT	Special Weather Statement	BOX	Franklin, Hampden, Hampshire	63 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2012 Every severe thunderstorm warning in 2012

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.