Alert archive / Massachusetts / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 34, NWS Boston/Norton, MA

July 7, 1994Worcester County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 7, 1994, 2:11 PM EDT for Worcester County, Massachusetts. It was in force for 49 min.

The area

The counties it named.

The facts

Issued
Jul 7, 1994, 2:11 PM EDT (18:11 UTC)
Expired
Jul 7, 1994, 3:00 PM EDT
In force
49 min
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Worcester County, MA

The nearest sounding before it

Albany, NY (KALB), launched 12:00Z, 6.2 hours before the alert went out and 162 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 1994-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1165 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 1994-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.1939Sfc1 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
1165 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
657 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
38 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.

000 
TTAA00 KBOS 071814
SVRBOS
MAC027-071900-
 
BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
211 PM EDT THU JUL 7 1994
 
THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  300 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL MASSACHUSETTS
 
   ...EASTERN WORCESTER COUNTY
 
A SEVERE THUNDERSTORM NEAR WESTBORO WILL MOVE SOUTHEAST AROUND 10 MPH.
THIS STORM HAS EXPANDED IN SIZE AND WILL LIKELY PRODUCE ADDITIONAL
HAIL...STRONG WINDS...DANGEROUS LIGHTNING...AND VERY HEAVY DOWNPOURS.
LARGE HAIL AND DOWNED TREES HAVE BEEN REPORTED IN WESTBORO.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESrTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 7, 1:12 PM EDT, 59 minutes before
MAZ013-017-018-019-501-504-071915-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
110 PM EDT THU JUL 7 1994

AT 105 PM NATIONAL WEATHER SERVICE DOPPLER RADAR AT TAUNTON SHOWED AN
AREA OF STRONG THUNDERSTORMS BETWEEN FOXBORO AND BRIDGEWATER MOVING EAST
AT 15 MILES PER HOUR. PEA SIZE HAIL AND A WIND GUST TO 47 MILES PER HOUR
WAS REPORTED IN EASTON.

THESE STORMS WILL CONTINUE TO MOVE EASTWARD ACROSS PLYMOUTH COUNTY AND
CAPE COD BAhY BY 200 PM.  SMALL HAIL...HEAVY RAIN...AND GUSTY WINDS CAN BEXPECTED WITH THESE STORMS.  BOATERS SHOULD SEEK SAFE HARBOR SHOULD
THESE STORMS APPROACH.

WGH&

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 1:16 PM EDTSevere Thunderstorm WarningBOXBristol, Plymouth59 min
Jul 7, 1:27 PM EDTSevere Thunderstorm WarningBOXNorfolk63 min
Jul 7, 1:37 PM EDTSevere Thunderstorm WarningBOXMiddlesex68 min
Jul 7, 1:45 PM EDTSevere Thunderstorm WarningBOXWorcester30 min
Jul 7, 2:11 PM EDTSevere Thunderstorm WarningBOXBristol, Plymouth64 min
Jul 7, 2:28 PM EDTSevere Thunderstorm WarningBOXNorfolk62 min
Jul 7, 2:41 PM EDTSevere Thunderstorm WarningBOXMiddlesex64 min
Jul 7, 3:12 PM EDTSevere Thunderstorm WarningBOXBristol63 min
Jul 7, 5:45 PM EDTSevere Thunderstorm WarningBOXFranklin60 min
Jul 7, 6:56 PM EDTSevere Thunderstorm WarningBOXHampshire64 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 1994Every severe thunderstorm warning in 1994

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.