Alert archive / Rhode Island / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 18, NWS Boston/Norton, MA

August 8, 1986Providence County, Rhode Island

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 8, 1986, 10:45 AM EDT for Providence County, Rhode Island. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 8, 1986, 10:45 AM EDT (14:45 UTC)
Expired
Aug 8, 1986, 12:45 PM EDT
In force
2 hr
Issued by
NWS Boston/Norton, MA
Area
Whole counties

County Providence County, RI

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, 2.8 hours before the alert went out and 135 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 KPVD 081442
SVRPVD
RIC007-081645-

BULLETIN--IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PROVIDENCE RI
1045 AM EDT  THU  AUG 8 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 1245 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF
RHODE ISLAND...PROVIDENCE
AT 1040 AM EDT...WEATHER SERVICE RADAR SHOWED A SEVERE THUNDERSTORM
IN PUTNAM COUNTY OF CONNECTICUT MOVING INTO PROVIDENCE COUNTY OF
RHODE ISLAND.

PEOPLE LIVING IN PROVIDENCE  COUNTY OF RHODE ISLAND SHOULD
BE ALERT FOR THREATENING WEATHER AND HEAD FOR A SAFE SHELTER AS IT
APPROACHES.

SCANTLEBURY

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, 10:07 AM EDT, 38 minutes before
^BOSSPSPVD

SPECIAL WEATHER STATEMENT FOR RHODE ISLAND
NATIONAL WEATHER SERVICE PROVIDENCE RI
1015 AM EDT FRI AUG 8 1986

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

AT 10 AM EDT CHATHAM WEATHER RADAR SHOWED A HEAVY THUNDERSTORM IN THE
NORWICH AREA OF CONNECTICUT MOVING IN A NORTHEAST DIRECTION INTO
WESTERN RHODE ISLAND..WASHINGTON OR KENT COUNTIES. THIS STORM MAY BE
ACCOMPANIED BY STRONG GUSTY WIND AND TORENTIAL DOUNPOURS.

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

RFS
Special weather statement, Aug 8, 10:19 AM EDT, 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARTFORD CT
 10 15 AM EDT FRI AUG 8 1986

  ...HEAVY THUNDERSTORM IN SOUTHEASTERN CONNECTICUT MOVING NORTHEAST...

THE NATIONAL WEATHER SERVICE RADAR AT BRADLEY INTERNATIONAL AIROPRT
IN WINDSOR LOCKS CONNECTICUT OBSERVED A HEAVY THUNDERSTORM OVER
MONTVILLE CONNECTICUT MOVING NORTHEAST AT 25 MPH. THIS CELL SHOULD
BE IN RHODE ISLAND WITHIN THE HOUR.

STATE POLICE AT MONTVILLE CONNECTICUT REPORTED VERY HEAVY DOWNPOURS
AND DANGEROUS LIGHTNING.

PERSONS LIVING IN THIS AREA SHOULD REMAIN ALERT FOR THREATENING WEATHER
AND TAKE COVER IF NECESSARY.

KONDOS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 11:00 AM EDTSevere Thunderstorm WarningBOXKent, Washington105 min

Nearby

Severe Thunderstorm Warnings in Rhode Island, 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.