Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 69, NWS Boston/Norton, MA

July 18, 2000Norfolk County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 18, 2000, 5:32 PM EDT for Norfolk County, Massachusetts. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 18, 2000, 5:32 PM EDT (21:32 UTC)
Expired
Jul 18, 2000, 6:00 PM EDT
In force
28 min
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Norfolk County, MA

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 9.5 hours before the alert went out and 115 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 2000-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 118 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 2000-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
118 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
566 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
54 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 
WUUS51 KBOX 182135
SVRBOS
MAC021-182200-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
532 PM EDT TUE JUL 18 2000

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORFOLK COUNTY IN EASTERN MASSACHUSETTS

* UNTIL 600 PM EDT.

* AT 530 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM DOVER TO MEDWAY...OR FROM 8 MILES
  SOUTHWEST OF NEWTON TO 3 MILES NORTHWEST OF FRANKLIN...MOVING
  SOUTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING AREA INCLUDE WRENTHAM...WESTWOOD... 
  WALPOLE...STOUGHTON...SHARON...RANDOLPH...NORWOOD...NORFOLK...  
  MILLIS.R..MEDFIELD...FOXBOROUGH...CANTON AND AVON.

SEVERE THUNDERSTORMS PRODUCE LARGE HAIL AND/OR WIND STRONG ENOUGH TO
KNOCK DOWN TREES AND POWER LINES. MOVE INDOORS AND STAY AWAY FROM
WINDOWS.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 12:24 PM EDTSevere Thunderstorm WarningBOXWorcester36 min
Jul 18, 1:43 PM EDTSevere Thunderstorm WarningBOXMiddlesex47 min
Jul 18, 2:29 PM EDTSevere Thunderstorm WarningBOXEssex, Middlesex46 min
Jul 18, 3:13 PM EDTSevere Thunderstorm WarningBOXMiddlesex32 min
Jul 18, 3:18 PM EDTSevere Thunderstorm WarningBOXEssex17 min
Jul 18, 3:22 PM EDTSevere Thunderstorm WarningBOXSuffolk23 min
Jul 18, 3:31 PM EDTSevere Thunderstorm WarningBOXNorfolk44 min
Jul 18, 3:44 PM EDTSevere Thunderstorm WarningBOXSuffolk31 min
Jul 18, 4:00 PM EDTSevere Thunderstorm WarningBOXPlymouth30 min
Jul 18, 4:13 PM EDTSevere Thunderstorm WarningBOXNorfolk32 min
Jul 18, 4:39 PM EDTSevere Thunderstorm WarningBOXPlymouth21 min
Jul 18, 4:53 PM EDTSevere Thunderstorm WarningBOXWorcester27 min
Jul 18, 5:01 PM EDTSevere Thunderstorm WarningBOXPlymouth19 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2000Every severe thunderstorm warning in 2000

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.