Alert archive / Massachusetts / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 5, NWS Boston/Norton, MA

May 28, 1986Nantucket County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at May 28, 1986, 2:40 PM EDT for Nantucket County, Massachusetts. It was in force for 60 min.

The area

The counties it named.

The facts

Issued: May 28, 1986, 2:40 PM EDT (18:40 UTC)
Expired: May 28, 1986, 3:40 PM EDT
In force: 60 min
Issued by: NWS Boston/Norton, MA
Area: Whole counties

County Nantucket 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

Chatham, MA (KCHH), launched 12:00Z, 6.7 hours before the alert went out and 45 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3 J/kg
Mixed-layer CIN: -267 J/kg
Mixed-layer LCL: 1923 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 64 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 KBOS 281839
SVRBOS
MAC007-019-291940-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE BOSTON MA
ISSUED 240 PM EDT WED MAY 28 1986 EXPIRES 340 PM EDT 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 340 PM EDT FOR PERSONS
IN THE FOLLOWING COUNTIES OF

SOUTHEASTERN MASSACHUSETTS...DUKES...NANTUCKET...INCLUDING THE
ADJACENT COASTAL WATERS SOUTH OF CAPE COD.

SEVERE THUNDERSTORMS WITH LARGE HAIL AND STRONG GUSTY WINDS HAVE MOVE
ACROSS CAPE COD INTO NANTUCKET SOUND.  ONE  INCH HAIL WAS REPORTED
AT SANDWICH.

PREPARE FOR STORNG DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN8 AND
LIGHTNING.  REPORT ALL SEVERE WEATHER TO YOUR LOCAL LAW ENFORCEMENT
OFFICIALS AND ASK THEM TO PASS THIS INFORMATION ALONG TO THE NATIONAL
WEATHER SERVICE.

SCHOR.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, May 28, 1:56 PM EDT, 44 minutes before

SPECIAL WEATHER STATEMENT FOR MASSACHUSETTS
NATIONAL WEATHER SERVICE BOSTON MA
150 PM EDT WED MAY 28 1986

AT 140 PM EDT WEATHER RADAR INDICATED A VERY HEAVY THUNDERSTORM
IN CAPE COD BAY MOVING SOUTHEASTWARD TOWARD CAPE COD AT 35 MPH.

THIS THUNDERSTORM WILL AFFECT CAPE COD BETWEEN 2 AND 3 PM EDT.
VERY HEAVY SHOWERS..POSSIBLE HAIL AND STRONG GUSTY WINDS WILL
ACCOMPANY THE PASSAGE OF THIS STORM.

IF THREATENING WEATHER APPROACHES SEEK SAFE SHELTER IMMEDIATELY.

RMK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 2:40 PM EDT	Severe Thunderstorm Warning	BOX	Dukes	60 min
May 28, 3:10 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable	50 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 1986 Every severe thunderstorm warning in 1986

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.