Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 95, NWS Boston/Norton, MA

August 15, 2012Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 15, 2012, 7:14 PM EDT for Hampden County, Hampshire County, Massachusetts. It was in force for 27 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: Aug 15, 2012, 7:14 PM EDT (23:14 UTC)
Expired: Aug 15, 2012, 7:41 PM EDT
In force: 27 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Hampden County, MA, Hampshire County, MA

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 11.2 hours before the alert went out and 129 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: 27 J/kg
Mixed-layer CIN: -153 J/kg
Mixed-layer LCL: 684 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 84 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.

437 
WUUS51 KBOX 152314
SVRBOX
MAC013-015-160015-
/O.NEW.KBOX.SV.W.0095.120815T2314Z-120816T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
714 PM EDT WED AUG 15 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...
  THIS INCLUDES THE CITIES OF...SPRINGFIELD...CHICOPEE...
  SOUTHEASTERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 815 PM EDT

* AT 711 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
  SPRINGFIELD...AND WAS MOVING EAST AT 15 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...LUDLOW...EAST LONGMEADOW...
  WILBRAHAM...HAMPDEN...PALMER...MONSON AND WALES.

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 4229 7264 4224 7223 4220 7226 4219 7226
      4216 7220 4203 7221 4203 7255 4203 7261
      4204 7275
TIME...MOT...LOC 2314Z 290DEG 12KT 4212 7252

$$

DUNTEN

2 follow-up statements

340 
WWUS51 KBOX 152330
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
730 PM EDT WED AUG 15 2012

MAC013-015-160015-
/O.CON.KBOX.SV.W.0095.000000T0000Z-120816T0015Z/
HAMPSHIRE MA-HAMPDEN MA-
730 PM EDT WED AUG 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR CENTRAL HAMPDEN AND SOUTHEASTERN HAMPSHIRE COUNTIES...

AT 729 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR WILBRAHAM...OR NEAR
SPRINGFIELD...MOVING SOUTHEAST AT 10 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
HAMPDEN...PALMER...MONSON AND WALES

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 4229 7264 4224 7223 4220 7226 4219 7226
      4216 7220 4203 7221 4203 7255 4203 7261
      4204 7275
TIME...MOT...LOC 2330Z 294DEG 10KT 4210 7247

$$

DUNTEN

287 
WWUS51 KBOX 152341
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
741 PM EDT WED AUG 15 2012

MAC013-015-152351-
/O.CAN.KBOX.SV.W.0095.000000T0000Z-120816T0015Z/
HAMPSHIRE MA-HAMPDEN MA-
741 PM EDT WED AUG 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL HAMPDEN AND
SOUTHEASTERN HAMPSHIRE COUNTIES IS CANCELLED...

LAT...LON 4229 7264 4224 7223 4220 7226 4219 7226
      4216 7220 4203 7221 4203 7255 4203 7261
      4204 7275
TIME...MOT...LOC 2341Z 290DEG 12KT 4209 7241

$$

DUNTEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 15, 3:48 AM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire	3 hr
Aug 15, 4:54 AM EDT	Special Weather Statement	BOX	Franklin	51 min
Aug 15, 5:16 AM EDT	Severe Thunderstorm Warning	BOX	Hampden	44 min
Aug 15, 5:28 AM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire, Middlesex, Worcester	3 hr
Aug 15, 6:04 AM EDT	Special Weather Statement	BOX	Worcester	41 min
Aug 15, 6:14 AM EDT	Special Marine Warning	BOX		61 min
Aug 15, 6:58 AM EDT	Areal Flood Advisory	BOX	Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk and 1 more	113 min
Aug 15, 8:27 AM EDT	Areal Flood Advisory	BOX	Barnstable, Bristol, Essex, Middlesex, Norfolk, Plymouth and 1 more	93 min
Aug 15, 8:46 AM EDT	Flash Flood Warning	BOX	Bristol, Plymouth	74 min
Aug 15, 9:15 AM EDT	Special Marine Warning	BOX		63 min
Aug 15, 9:41 AM EDT	Special Weather Statement	BOX	Barnstable, Dukes	64 min
Aug 15, 9:51 AM EDT	Areal Flood Advisory	BOX	Barnstable, Bristol, Dukes, Plymouth	67 min
Aug 15, 2:24 PM EDT	Special Weather Statement	BOX	Franklin	51 min
Aug 15, 5:39 PM EDT	Special Weather Statement	BOX	Hampden	66 min
Aug 15, 6:11 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	64 min
Aug 15, 6:24 PM EDT	Flash Flood Warning	BOX	Hampden, Hampshire	3 hr

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; the sounding from the Mesonet's radiosonde archive.