Alert archive / Massachusetts / Tornado Warnings in 1990

Tornado Warning 1, NWS Boston/Norton, MA

August 10, 1990Worcester County, Massachusetts

NWS Boston/Norton, MA issued this tornado warning at Aug 10, 1990, 3:20 PM EDT for Worcester County, Massachusetts. It was in force for 40 min.

The area

The counties it named.

The facts

Issued
Aug 10, 1990, 3:20 PM EDT (19:20 UTC)
Expired
Aug 10, 1990, 4:00 PM EDT
In force
40 min
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Worcester County, MA

The radar

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

The nearest sounding before it

Albany, NY (KALB), launched 12:00Z, 7.3 hours before the alert went out and 162 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 1990-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 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 1990-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 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
5 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
724 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
137 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 101917
TORORH
MAC011-027-102015-    

BULLETIN-IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE WORCESTER MA
320 PM EDT FRI AUG 10 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE 
UNTIL 400 PM EDT FOR THE FOLLOWING COUNTY IN                 

MASSACHUSETTS...NORTHERN WORCESTER 

AT 315PM ASHBURNHAM CIVIL DEFENSE REPORTED A TORNADO IN THE TOWN OF
ASHBURNHAM MOVING TOWARD THE NORTHEAST.

TAKE COVER IMMEDIATELY IF IN THAT AREA.
KEHIR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 4:06 PM EDTFlash Flood WarningBOXHampden3 hr

Nearby

Tornado Warnings in Massachusetts, 1990Every tornado warning in 1990Tornadoes in 1990

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.