Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 1, NWS Boston/Norton, MA

May 27, 2002Middlesex County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at May 27, 2002, 4:39 PM EDT for Middlesex County, Massachusetts. It was in force for 36 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 27, 2002, 4:39 PM EDT (20:39 UTC)
Expired
May 27, 2002, 5:15 PM EDT
In force
36 min
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Middlesex County, MA

What was reported inside it

TimeReportWhereRemark
May 27, 4:39 PM EDTHail 1.75Holliston, MA
May 27, 5:05 PM EDTHail 0.75Ashland, MA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 8.7 hours before the alert went out and 148 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 2002-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 228 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 2002-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 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
228 J/kg
Mixed-layer CIN
-191 J/kg
Mixed-layer LCL
826 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBOX 272039
SVRBOX
MAC017-272115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
438 PM EDT MON MAY 27 2002

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL MIDDLESEX COUNTY IN EASTERN MASSACHUSETTS

* UNTIL 515 PM EDT.

* AT 435 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED
  A SEVERE THUNDERSTORM OVER HOLLISTON...MOVING EAST AT 20 MPH.
  RADAR INDICATES THIS STORM WILL LIKELY PRODUCE LARGE HAIL AS IT
  MOVES ACROSS SOUTHERN MIDDLESEX COUNTY.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SHERBORN AROUND 445 PM EDT
  NATICK AROUND 450 PM EDT.

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

$$

JWD/MB

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 4:47 PM EDTSevere Thunderstorm WarningBOXNorfolk28 min
May 27, 5:15 PM EDTSevere Thunderstorm WarningBOXNorfolk, Suffolk30 min
May 27, 6:47 PM EDTSevere Thunderstorm WarningBOXMiddlesex43 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2002Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.