Alert archive / Massachusetts / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 1, NWS Boston/Norton, MA

February 18, 1998Bristol County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Feb 18, 1998, 5:37 AM EST for Bristol County, Massachusetts. It was in force for 38 min. 1 report 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
Feb 18, 1998, 5:37 AM EST (10:37 UTC)
Expired
Feb 18, 1998, 6:15 AM EST
In force
38 min
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Bristol County, MA

What was reported inside it

TimeReportWhereRemark
Feb 18, 6:00 AM ESTThunderstorm Wind 56Westport, 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 00:00Z, 10.6 hours before the alert went out and 93 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 00:00Z on 1998-02-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 1998-02-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
697 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
107 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.

957 
WUUS1 KBOS 181038 RRA
SVRBOS
MAC005-181115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
537 AM EST WED FEB 18 1998
 
THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 615 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST MASSACHUSETTS
 
   ...SOUTHERN BRISTOL COUNTY
 
AND THE ADJACENT COASTAL WATERS.
 
AT 535 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A SEVERE
THUNDERSTORM MOVING ONSHORE FROM RHODE ISLAND SOUND NEAR WESTPORT. THIS
STORM IS MOVING NORTHEAST AT 35 MPH AND WILL IMPACT THE TOWNS OF
WESTPORT ...DARTMOUTH...FALL RIVER...AND FREETOWN BY 600 AM.
 
THIS STORM WILL LIKELY HAVE DIME SIZE HAIL ACCOMPANIED BY GUSTY WINDS.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 58 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
 
JL

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 18, 8:25 AM ESTFlash Flood WarningBOXBristol3 hr
Feb 18, 9:48 AM ESTFlash Flood WarningBOXPlymouth4 hr

Nearby

Severe Thunderstorm Warnings in Massachusetts, 1998Every severe thunderstorm warning in 1998

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.