Alert archive / Rhode Island / Flash Flood Warnings in 1991

Flash Flood Warning 6, NWS Boston/Norton, MA

August 19, 1991Kent County, Providence County, Washington County, Rhode Island

NWS Boston/Norton, MA issued this flash flood warning at Aug 19, 1991, 12:54 PM EDT for Kent County, Providence County, Washington County, Rhode Island. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Aug 19, 1991, 12:54 PM EDT (16:54 UTC)
Expired
Aug 19, 1991, 7:00 PM EDT
In force
6 hr
Issued by
NWS Boston/Norton, MA
Area
Whole counties

Counties Kent County, RI, Providence County, RI, Washington County, RI

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 4.9 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 1991-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 921 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 1991-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 179 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
921 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
540 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
179 m²/s²
0-3 km storm-relative helicity
172 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPVD 191656 RRA
FFWPVD
RIC003-007-009-192300-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PROVIDENCE RI
1254 PM EDT MON AUG 19 1991
 
THE NATIONAL WEATHER SERVICE IN PROVIDENCE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  700 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL RHODE ISLAND
 
   ...WESTERN KENT COUNTY
 
IN NORTH RHODE ISLAND
 
   ...PROVIDENCE COUNTY
 
IN SOUTH RHODE ISLAND
 
   ...WESTERN WASHINGTON COUNTY
 
AT 1245 PM RADAR INDICATED TORRENTIAL RAINFALL IN WESTERN WASHINGTON
COUNTY FROM WESTERLY NORTH TO HOPKINTON ASSOCIATED WITH HURRICANE BOB.
RAINFALL MAY EXCEED 5 INCHES IN SEVERAL HOURS. ROADS WILL BECOME
FLOODED AND BEWARE OF RISING STREAMS.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
 
SISSON

What forecasters said that day

The local office's own words before this flash flood 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 19, 7:19 AM EDT, 5 hours 35 minutes before
MAZALL-192200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOSTON MA
720 AM EDT MON AUG 19 1991

...TORNADO WATCH FOR SOUTHERN NEW ENGLAND...

TORNADO WATCH NUMBER 736 HAS BEEN ISSUED FOR ALL OF SOUTHERN NEW ENGLAND
...EFFECTIVE TIL 6 PM EDT.

WITH THE APPROACH AND PASSAGE OF HURRICANE BOB AND VERY UNSTABLE TROPICAL
AIR THROUGHOUT SOUTHERN NEW ENGLAND...CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS. PERSONS IN THE WATCH AREA SHOULD BE
ON THE LOOKOUT FOR THREATENING WEATHER CONTITIONS AND LISTEN FOR LATER
STATEMENTS AND POSSIBLE WARNINGS.

THE NEXT STATEMENT ON THIS SITUATION WILL BE ISSUED BY THE NATIONAL
WEATHER SERVICEIN BOSTON AROUND 1030 AM EDT.

COTE

Nearby

Flash Flood Warnings in Rhode Island, 1991Every flash flood warning in 1991

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.