Alert archive / Vermont / Flash Flood Warnings in 1990

Flash Flood Warning 36, NWS Burlington, VT

July 23, 1990Addison County, Vermont

NWS Burlington, VT issued this flash flood warning at Jul 23, 1990, 3:19 PM EDT for Addison County, Vermont. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jul 23, 1990, 3:19 PM EDT (19:19 UTC)
Expired
Jul 23, 1990, 6:15 PM EDT
In force
3 hr
Issued by
NWS Burlington, VT
Area
Whole counties

County Addison County, VT

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 159 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 1990-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 340 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 1990-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 143 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
340 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
683 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
143 m²/s²
0-3 km storm-relative helicity
163 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBTV 231920
FFWBTV
VTC001-232215-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE BURLINGTON VT
319 PM EDT MON JUL 23 1990
 
THE NATIONAL WEATHER SERVICE IN BURLINGTON VT HAS ISSUED A
FLOOD WARNING EFFECTIVE UNTIL  615 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN WEST CENTRAL VERMONT
 
   ...ADDISON COUNTY
 
THUNDERSTORMS MOVING ACROSS ADDISON COUNTY WILL CONTINUE FOR THE NEXT
2 HOURS WITH VERY HEAVY RAIN. THE MOST SUSCEPTIBLE AREA FOR FLOODING
IS THE EAST HALF OF THE COUNTY. THE NEW HAVEN RIVER WILL RISE RAPIDLY
FROM MIDDLEBURY EASTWARD.
 
ROADS...ESPECIALLY SECONDARY DIRT ROADS WILL HAVE WASHOUTS. IF YOU
ARE ON THE ROAD BE ESPECIALLY CAREFUL. THOSE WHO LIVE ALONG RIVERS OR
NEXT TO STEEP MOUNTAIN SLOPES SHOULD BE READY TO TAKE QUICK ACTION IF
FLOODING OCCURS. SEEK HIGHER GROUND
 
A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
MOST 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 TO HIGHER GROUND.
 
HOGAN

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, Jul 23, 1:32 PM EDT, 1 hour 47 minutes before
VTZ001-002-003-NYZ011-231830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
131 PM EDT MON JUL 23 1990

THUNDERSTORM ARE MOVING THROUGH NORTHERN VERMONT.

AT 130 PM...THUNDERSTORMS WERE MOVING THROUGH THE CHAMPLAIN VALLEY OF
NEW YORK AND VERMONT AND INTO THE NORTHEAST KINGDOM. THE THUNDERSTORMS
HAVE BEEN PRODUCING LOCALLY HEAVY RAINFALL AS THEY MOVE THROUGH THE
AREA.

THE THUNDERSTORMS ARE MOVING NORTHEAST AT 30 MILES AN HOUR. ADDITIONAL
THUNDERSTORMS WILL LIKELY MOVE THROUGH NORTHERN VERMONT IN THE NEXT FEHOURS. THESE THUNDERSTORMS WILL LIKELY PRODUCE HEAVY DOWNPOURS AND MAY
PRODUCE SOME LOCALIZED STREET FLOODING.

IF YOU ARE TRAVELING THIS AFTERNOON...BE PREPARE+D FOR SOME HEAVY RAIN
AND WATCH OUT FOR WATER COLLECTING ON ROADWAYS.

END...AS
Special weather statement, Jul 23, 1:33 PM EDT, 1 hour 46 minutes before
VTZ001-002-003-NYZ011-231830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
131 PM EDT MON JUL 23 1990

THUNDERSTORM ARE MOVING THROUGH NORTHERN VERMONT.

AT 130 PM...THUNDERSTORMS WERE MOVING THROUGH THE CHAMPLAIN VALLEY OF
NEW YORK AND VERMONT AND INTO THE NORTHEAST KINGDOM. THE THUNDERSTORMS
HAVE BEEN PRODUCING LOCALLY HEAVY RAINFALL AS THEY MOVE THROUGH THE
AREA.

THE THUNDERSTORMS ARE MOVING NORTHEAST AT 30 MILES AN HOUR. ADDITIONAL
THUNDERSTORMS WILL LIKELY MOVE THROUGH NORTHERN VERMONT IN THE NEXT FEW
HOURS. THESE THUNDERSTORMS WILL LIKELY PRODUCE HEAVY DOWNPOURS AND MAY
PRODUCE SOME LOCALIZED STREET FLOODING.

IF YOU ARE TRAVELING THIS AFTERNOON...BE PREPARED F0OR SOME HEAVY RAIN
AND WATCH OUT FOR WATER COLLECTING ON ROADWAYS.
END...AS

The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 23, 2:29 PM EDTFlash Flood WarningBTVChittenden, Lamoille, Washington3 hr

Nearby

Flash Flood Warnings in Vermont, 1990Every flash flood warning 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.