Alert archive / Massachusetts / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 29, NWS Boston/Norton, MA

August 6, 1989Franklin County, Worcester County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 6, 1989, 3:45 PM EDT for Franklin County, Worcester County, Massachusetts. It was in force for 75 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
Aug 6, 1989, 3:45 PM EDT (19:45 UTC)
Expired
Aug 6, 1989, 5:00 PM EDT
In force
75 min
Issued by
NWS Boston/Norton, MA
Area
Whole counties

Counties Franklin County, MA, Worcester County, MA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Aug 6, 4:19 PM EDTThunderstorm Wind 50Worcester, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Albany, NY (KALB), launched 12:00Z, 7.8 hours before the alert went out and 132 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 1989-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 134 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 1989-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
134 J/kg
Mixed-layer CIN
-127 J/kg
Mixed-layer LCL
1080 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
72 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 KORH 061945
SVRORH
MAC027-011-062100-

BULLETIN-IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WORCESTER MA
345 PM EDT SUN AUG 06 1989 EXPIRES 500 PM EDT

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 500 PM EDT FOR THE FOLLOWING COUNTIES IN

MASSACHUSETTS...NORTH FRANKLIN AND NORTH WORCESTER

IF THREATENING WEATHER APPROACHES GO TO A SAFE PLACE IMMEDIATELY. TO
REPORT SEVERE WEATHER..PLEASE ASK YOUR LOCAL LAW ENFORCEMENT AGENCY
TO RELAY YOUR REPORT TO THE NEAREST NATIONAL WEATHER SERVICE OFFICE.
$$
MCGUILL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 6:50 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampshire, Worcester55 min
Aug 6, 7:45 PM EDTSevere Thunderstorm WarningBOXWorcester60 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 1989Every severe thunderstorm warning in 1989

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.