Alert archive / Massachusetts / Tornado Warnings in 1993

Tornado Warning 2, NWS Boston/Norton, MA

July 8, 1993Norfolk County, Suffolk County, Massachusetts

NWS Boston/Norton, MA issued this tornado warning at Jul 8, 1993, 6:45 PM EDT for Norfolk County, Suffolk County, Massachusetts. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Jul 8, 1993, 6:45 PM EDT (22:45 UTC)
Expired
Jul 8, 1993, 7:30 PM EDT
In force
45 min
Issued by
NWS Boston/Norton, MA
Area
Whole counties

Counties Norfolk County, MA, Suffolk County, MA

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 10.8 hours before the alert went out and 116 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, Chatham, MA at 12:00Z on 1993-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 865 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, Chatham, MA at 12:00Z on 1993-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
865 J/kg
Mixed-layer CIN
-90 J/kg
Mixed-layer LCL
1257 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
27 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 082249
TORBOS
MAC021-025-082330-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BOSTON MA
645 PM EDT THU JUL 8 1993
 
THE NATIONAL WEATHER SERVICE IN BOSTON HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  730 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN  MASSACHUSETTS
 
   ...NORTHERN NORFOLK COUNTY...SUFFOLK COUNTY
 
AND THE ADJACENT COASTAL WATERS.
 
 
AT 635 PM RADAR INDICATED A POSSIBLE TORNADO 10 TO 15 MILES TO THE
NORTHWEST OF BOSTON. THE TORNADO IS MOVING TO THE EAST SOUTHEAST AT
AROUND 20 MPH AND WILL BE MOVING NEAR THE TOWNS OF LINCOLN AND ARLINGTON
AND THE CITY OF BOSTON BETWEEN 645PM AND 730PM.
 
TAKE COVER IMMEDIATELY.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 4:51 PM EDTSevere Thunderstorm WarningBOXFranklin69 min
Jul 8, 5:03 PM EDTSevere Thunderstorm WarningBOXHampden57 min
Jul 8, 5:40 PM EDTSevere Thunderstorm WarningBOXWorcester65 min
Jul 8, 6:02 PM EDTSevere Thunderstorm WarningBOXHampden43 min
Jul 8, 6:10 PM EDTSevere Thunderstorm WarningBOXWorcester65 min
Jul 8, 6:18 PM EDTSevere Thunderstorm WarningBOXEssex, Middlesex57 min
Jul 8, 6:27 PM EDTTornado WarningBOXMiddlesex33 min
Jul 8, 7:04 PM EDTSevere Thunderstorm WarningBOXMiddlesex26 min
Jul 8, 7:29 PM EDTSevere Thunderstorm WarningBOXNorfolk, Suffolk31 min
Jul 8, 7:33 PM EDTSevere Thunderstorm WarningBOXBristol, Plymouth57 min

Nearby

Tornado Warnings in Massachusetts, 1993Every tornado warning in 1993Tornadoes in 1993

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.