Alert archive / Massachusetts / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 26, NWS Boston/Norton, MA

August 8, 1986Worcester County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 8, 1986, 5:30 PM EDT for Worcester County, Massachusetts. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Aug 8, 1986, 5:30 PM EDT (21:30 UTC)
Expired
Aug 8, 1986, 6:30 PM EDT
In force
60 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

Chatham, MA (KCHH), launched 12:00Z, 9.5 hours before the alert went out and 177 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 1986-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1301 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 1986-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 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
1301 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
610 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KORH 082130
SVRORH
MAC027-082130-

BULLETIN-IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WORCESTER MA
530 PM EDT FRI AUG 8 1986 EXPIRES 630 PM EDT 

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 630 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

MASSACHUSETTS...NORTHERN 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 NEAREAST NATIONAL WEATHER SERVICE OFFICE.

MCGUILL

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, Aug 8, 1:59 PM EDT, 3 hours 31 minutes before
^BOSSPSPVD

SPECIAL WEATHER STATEMENT FOR RHODE ISLAND
NATIONAL WEATHER SERVICE PROVIDENCE RI
200 PM EDT FRI AUG 8 1986

...HEAVY THUNDERSTORMS NOW IN SOUTHEASTERN CONNECTICUT...

AT 2 PM EDT CHATHAM WEATHER RADAR SHOWED A HEAVY THUNDERSTORM IN THE
NORWICH..NEW LONDON  AREA OF CONNECTICUT MOVING IN EAST INTO  RHODE
ISLAND..WASHINGTON OR KENT COUNTIES. THIS STORM MAY BE  ACCOMPANIED
BY STRONG GUSTY WIND..HAIL AND TORENTIAL DOUNPOURS THAT MAY CAUSE S\OME
STREET AND URBAN FLOODING.

PEOPLE LIVING IN THIS AREA SHOWLD REMAIN ALERT FOR THREATENING WEATHER
AND TAKE COVER AS IT APPROCHES.

RFS
Special weather statement, Aug 8, 2:09 PM EDT, 3 hours 21 minutes before
SPECIAL WEATHER STATEMENT FOR MASSACHUSETTS
NATIONAL WEATHER SERVICE BOSTON MA
210 PM EDT FRI AUG 8 1986

...A TORNADO WATCH IS IN EFFECT UNTIL 9 PM FOR ALL OF MASSACHUSETTS
   EXCEPT CAPE COD...

AT 2 PM NATIONAL WEATHER SERVICE RADAR SHOWED A BAND OF VERY HEAVY
THUNDERSTORMS STRETCHING FROM SOUTHERN AND CENTRAL RHODE ISLAND
TO SOUTHEASTERN CONNECTICUT.  THESE THUNDERSTORMS WILL MOVE EAST
ACROSS BRISTOL AND PLYMOUTH COUNTIES IN SOUTHEASTERN MASSACHUSETTS
BETWEEN 215 PM AND 330 PM.

THESE THUNDERSTORMS WILL BE ACCOMPANIED BY GUSTY WINDS..FREQUENT
LIGHTNING AND HEAVY RAINS WHICH WILL CAUSE LOCALIZED FLOODING OF
LOW LYING STREETS AND UNDERPASSES AND POOR DRAINAGE AREAS.

ANOTHER VERY STRONG THUNDERSTORM WAS LOCATED NEAR MARTHAS VINYARD
AT 2 PM.  THIS THUNDERSTORM WILL MOVE ACROSS THE ISLANDS AND BRUSH
CAPE COD BETWEEN 215 PM AND 330 PM.  THIS THUNDERSTORM IS ALSO
ACCOMPANIED BY VERY HEAVY RAIN AND FREQUENT LIGHTNING.

STAY TUNED TOb YOUR LOCAL RADIO AND TV STATIONS FOR POSSIBLE
WARNINGS BY THE NATIONAL WEATHER SERVICE.

THE NEXT STATEMENT WILL BE ISSUED AROUND 315 PM OR EARLIER IF NEEDED.

DILLEY
Special weather statement, Aug 8, 2:20 PM EDT, 3 hours 10 minutes before
^BOSSPSPVD

SPECIAL WEATHER STATEMENT FOR RHODE ISLAND
NATIONAL WEATHER SERVICE PROVIDENCE RI
215 PM EDT FRI AUG 8 1986

...A TORNADO WATCH IS IN EFFECT UNTIL 9 PM FOR ALL OF RHODE ISLAND...

AT 2 PM EDT NATIONAL WEATHER RADAR SHOWED A BAND OF VERY HEAVY
THUNDERSTORMS STRETCHING FRON SOUTHEASTERN CONNECTICUT INTO RHODE
ISLAND.  THESE THUNDERSTORMS WILL MOVE EAST ACROSS THE STATE BETWEEN
2PM AND 4PM.

THESE THUNDRSTORMS WILL BE ACCOMPANIED BY GUSTY WIND..FREQUENT
LIGHTNING AND HEAVY RAINS WHICH WILL CAUSE LOCALIZED FLOODING OF
LOW LYING STREETS AND UNDERPASSES WITH POOR DRAINAGE AREAS.

STAY TUNED TO YOUR LOCAL RAIDO AND TV STATION FOR POSSIBLE WARNINGS
BY THE NATIONAL WEATHER SERVISE.

jRFS
Special weather statement, Aug 8, 3:20 PM EDT, 2 hours 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARTFORD CT
 315 PM EDT FRI AUG 8 1986

 ...THUNDERSTORMS CONTINUE TO DEVELOP THROUGHOUT CONNECTICUT...

AT 3 PM EDT THUNDERSTORMS HAVE REDEVELOPED IN THE SOUND SOUTH OF THE
BRIDGEPORT...NEW HAVEN AREA.  ANOTHER HEAVY THUNDERSTORM JUST NORTH
OF WINDSOR LOCKS.  NUMEROUS SMALLER CELLS ARE ALSO BLANKETING EASTERN
EASTERN CONNECTICUT. THESE THUNDERSTORMS ARE MOVING TO THE  NORTHEAST
AT 35 MPH.

THESE STORMS ARE PRODUCING HEAVY DOWNPOURS WHICH WILL QUICKLY FLOOD
UNDERPASSES AND LOW LYING ROADWAYS WHICH COULD CAUSE HAZARDOUS DRIVING
FOR COMMUTERS.

REMEMBER...A TORNADO WATCH IS AN ALERT...CONDITIONS ARE FAVORABLE
THROUGHOUT THE AREA FOR THE DEVELOPMENT OF TORNADOES AND SEVERE THUNDER-
STORMS.
 ANOTHER STATEMENT WILL BE ISSUED BY 500 PM EDT OR EARLIER IF
NECESSARY.

LARO
Special weather statement, Aug 8, 3:22 PM EDT, 2 hours 8 minutes before
SPECIAL WEATHER STATEMENT FOR MASSACHUSETTS
NATIONAL WEATHER SERVICE BOSTON MA
325 PM EDT FRI AUG 8 1986

...A TORNADO WATCH IS IN EFFECT UNTIL 9 PM FOR ALL OF MASSACHUSETTS
   EXCEPT CAPE COD...

AT 3 PM NATIONAL WEATHER SERVICE RADAR SHOWED A BAND OF VERY HEAVY
THUNDERSTORMS ENTERING THE FALL RIVER AND NEW BEDFORD AREA IN
SOUTHEASTERN MASSACHUSETTS. THESE SLOW MOVING THUNDERSTORMS WILL
LIKELY CAUSE URBAN POOR DRAINAGE FLOODING BETWEEN 330 PM AND 430 PM.
THE THUNDERSTORMS WILL THEN CONTINUE EAST INTO THE PLYMOUTH COUNTY.
THESE THUNDERSTORMS WILL ALSO BE ACCOMPANIED BY FREQUENT VIVID T
LIGHTNING AND GUSTY WINDS.

ALSO AT 3 PM..RADAR SHOWED THUNDERSTORMS DEVELOPING JUST WEST OF
LOWELL ALONG THE NEW HAMPSHIRE BORDER.  THESE THUNDERSTORMS WILL
ALSO HAVE BRIEF HEAVY RAINS..GUSTY WINDS AND POSSIBLY SOME HAIL AS
THEY MOVE ACROSS THE LOWELL LAWRENCE AREA BETWEEN 330 AND 5 PM.

STAY TUNED TO YOUR LOCAL RADIO AND TV STATIONS FOR POSSIBLE
WARNINGS BY THE NATIONAL WEATHER SERVICE.

THE NEXT STATEMENT WILL BE ISSUED AROUND 415 PM OR EARLIER IF NEEDED.

DILLEY
Special weather statement, Aug 8, 4:00 PM EDT, 1 hour 30 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WORCESTER MA
4 PM EDT FRI AUG 8 1986

AT 4 PM NATIONAL WEATHER SERVICE RADAR HAD THUNDERSTORMS ACCOMPANIED
BY HEAVY DOWNPOURS AND FREQUENT LIGHTNING MOVING ACROSS FRANKLIN AND
NORTHERN WORCESTER COUNTIES OF MASSACHUSETTS.  THESE STORMS ARE MOVING
TOWARD THE EASTNORTHEAST AT 25 MPH.

STATE AND LOCAL LAW ENFORCEMENT AGENCIES IN FRANKLIN AND NORTHERN
WORCESTER COUNTIES HAVE REPORTED TORRENTIAL RAINS WITH STREET
FLOODING.

PERSONS SHOULD REMAIN ALERT FOR ADDITIONAL THREATENING WEATHER THIS
AFTERNOON AND EVENING AND TAKE COVER AS NECESSARY.

HOLMES

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 11:00 AM EDTSevere Thunderstorm WarningBOXWorcester60 min
Aug 8, 11:18 AM EDTSevere Thunderstorm WarningBOXNorfolk72 min
Aug 8, 11:37 AM EDTSevere Thunderstorm WarningBOXMiddlesex68 min
Aug 8, 3:55 PM EDTSevere Thunderstorm WarningBOXBristol, Plymouth65 min
Aug 8, 3:55 PM EDTSevere Thunderstorm WarningBOXBarnstable65 min
Aug 8, 4:24 PM EDTTornado WarningBOXMiddlesex66 min
Aug 8, 4:30 PM EDTSevere Thunderstorm WarningBOXWorcester60 min
Aug 8, 5:02 PM EDTTornado WarningBOXEssex58 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 1986Every 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.