Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 70, NWS Boston/Norton, MA

August 5, 2012Franklin County, Hampshire County, Worcester County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 5, 2012, 3:03 PM EDT for Franklin County, Hampshire County, Worcester County, Massachusetts. It was in force for 42 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 5, 2012, 3:03 PM EDT (19:03 UTC)
Expired
Aug 5, 2012, 3:45 PM EDT
In force
42 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon

Counties Franklin County, MA, Hampshire County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 108 km from the middle of the area, began a volume at 19:06 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 nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 7.1 hours before the alert went out and 133 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, Albany, NY at 12:00Z on 2012-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 520 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, Albany, NY at 12:00Z on 2012-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 119 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
520 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
694 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
119 m²/s²
0-3 km storm-relative helicity
154 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

541 
WUUS51 KBOX 051903
SVRBOX
MAC011-015-027-051945-
/O.NEW.KBOX.SV.W.0070.120805T1903Z-120805T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
303 PM EDT SUN AUG 5 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  SOUTHEASTERN FRANKLIN COUNTY IN WESTERN MASSACHUSETTS...
  EAST CENTRAL HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...
  THIS INCLUDES THE CITY OF AMHERST...

* UNTIL 345 PM EDT

* AT 257 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 PELHAM AND 
  AMHERST...AND WAS MOVING NORTHEAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...SHUTESBURY...NEW SALEM...
  PETERSHAM...BARRE...ATHOL...PHILLIPSTON...HUBBARDSTON AND
  TEMPLETON.

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 4268 7211 4251 7193 4226 7243 4239 7255
TIME...MOT...LOC 1902Z 232DEG 27KT 4238 7240

$$

WTB
1 follow-up statement
023 
WWUS51 KBOX 051918
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
318 PM EDT SUN AUG 5 2012

MAC011-015-027-051945-
/O.CON.KBOX.SV.W.0070.000000T0000Z-120805T1945Z/
WORCESTER MA-FRANKLIN MA-HAMPSHIRE MA-
318 PM EDT SUN AUG 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR EAST CENTRAL HAMPSHIRE...SOUTHEASTERN FRANKLIN AND NORTHWESTERN
WORCESTER COUNTIES...

AT 314 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 NEW SALEM...OR 12
MILES EAST OF AMHERST...MOVING NORTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PETERSHAM...BARRE...ATHOL...PHILLIPSTON...HUBBARDSTON AND TEMPLETON

LAT...LON 4268 7211 4251 7193 4226 7243 4239 7255
TIME...MOT...LOC 1918Z 232DEG 27KT 4245 7227

$$

WTB

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 4:03 AM EDTFlash Flood WatchBOXFranklin, Hampden, Hampshire19 hr
Aug 5, 4:08 AM EDTSmall Craft AdvisoryBOX27 hr
Aug 5, 2:02 PM EDTSpecial Weather StatementBOXHampden, Hampshire58 min
Aug 5, 3:33 PM EDTSpecial Weather StatementBOXWorcester57 min
Aug 5, 4:20 PM EDTSevere Thunderstorm WarningBOXHampden40 min
Aug 5, 4:38 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Worcester47 min
Aug 5, 5:05 PM EDTSevere Thunderstorm WarningBOXHampden, Worcester40 min
Aug 5, 5:30 PM EDTSpecial Marine WarningBOX51 min
Aug 5, 5:46 PM EDTSevere Thunderstorm WarningBOXWorcester29 min
Aug 5, 7:52 PM EDTSpecial Weather StatementBOXHampden83 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2012Every 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; radar from the NEXRAD Level II archive.