Alert archive / Vermont / Flash Flood Warnings in 1990

Flash Flood Warning 37, NWS Burlington, VT

August 7, 1990Washington County, Vermont

NWS Burlington, VT issued this flash flood warning at Aug 7, 1990, 9:26 AM EDT for Washington County, Vermont. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 7, 1990, 9:26 AM EDT (13:26 UTC)
Expired
Aug 7, 1990, 11:30 AM EDT
In force
2 hr
Issued by
NWS Burlington, VT
Area
Whole counties

County 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, 1.4 hours before the alert went out and 193 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 1990-08-07Temperature 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 km15 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 1990-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
3599 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
62 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 071328
FFWBTV
VTC023-071530-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE BURLINGTON VT
926 AM EDT TUE AUG 7 1990
 
THE NATIONAL WEATHER SERVICE IN BURLINGTON VT HAS ISSUED A
FLOOD WARNING EFFECTIVE UNTIL 1130 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN NORTH CENTRAL VERMONT
 
   ...WASHINGTON COUNTY
 
AT 920 AM HEAVY RAIN WAS FALLING IN THE MONTPELIER AREA OF WASHINGTON
COUNTY. THIS AREA HAD RECIEVED 3 TO 4 INCHES OF RAIN IN THE PAST 24
HOURS AND THIS AREA OF HEAVY RAIN COULD PRODUCE ANOTHER 1 TO 2 INCHES
IN AN HOUR PERIOD.
 
THE AREA OF HEAVIEST RAIN WILL MOVE TOWARD THE NORTHEAST...TO CALAIS
AND WOODBURY IN THE NEXT HOUR.
 
FLOODING WILL OCCUR ON STREAMS AND WASHOUTS OF ROADS WILL OCCUR.
 
 
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.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 12:02 PM EDTFlash Flood WarningBTVWashington5 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.