Alert archive / Vermont / Flash Flood Warnings in 1990

Flash Flood Warning 35, NWS Burlington, VT

July 23, 1990Chittenden County, Lamoille County, Washington County, Vermont

NWS Burlington, VT issued this flash flood warning at Jul 23, 1990, 2:29 PM EDT for Chittenden County, Lamoille County, Washington County, Vermont. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jul 23, 1990, 2:29 PM EDT (18:29 UTC)
Expired
Jul 23, 1990, 5:30 PM EDT
In force
3 hr
Issued by
NWS Burlington, VT
Area
Whole counties

Counties Chittenden County, VT, Lamoille County, VT, Washington 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

Gray, ME (KGYX), launched 12:00Z, 6.5 hours before the alert went out and 210 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, Gray, ME at 12:00Z on 1990-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Gray, ME at 12:00Z on 1990-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3609 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
114 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 KBTV 231833 RRA
FFWBTV
VTC015-023-007-232130-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE BURLINGTON VT
229 PM EDT MON JUL 23 1990
 
THE NATIONAL WEATHER SERVICE IN BURLINGTON VT HAS ISSUED A
FLOOD WARNING EFFECTIVE UNTIL  530 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...S...
 
IN NORTH CENTRAL VERMONT
 
   ...LAMOILLE COUNTY...WASHINGTON COUNTY
 
IN NORTHWEST VERMONT
 
   ...CHITTENDEN COUNTY
 
THUNDERSTORMS ACROSS NORTHERN VERMONT HAVE RESULTED IN VERY HEAVY RAINREPORTS OF WATER OVER SOME ROADS...INCLUDING RTES 2...116 AND 108.
CAUTION IS ADVISED IN THESE AREAS.
 
HEAVY RAIN WILL CONTINUE ACROSS THESE COUNTIES FOR THE NEXT 3 HOURS.
WASHOUTS WILL OCCUR SO IF YOU ARE ON THE ROADS BE ALERT. IF YOU LIVE
NEAR A STREAM BE PREPARED TO ACT FOR RAPIDLY RISING WATER.
 
SOME OF THE MORE SUSCEPTIBLE AREAS LIE IN A LINE FROM HINESBURG TO
BOLTON TO STOWE. RESIDENTS IN THESE AREAS SHOULD BE ALERT FOR RAPID
FLOODING.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY. YOU SHOULD MOVE TO HIGHER GROUND.

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, 57 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, 56 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, 3:19 PM EDTFlash Flood WarningBTVAddison3 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.