Alert archive / Vermont / Flash Flood Warnings in 2005

Flash Flood Warning 13, NWS Burlington, VT

June 29, 2005Chittenden County, Vermont

NWS Burlington, VT issued this flash flood warning at Jun 29, 2005, 2:20 PM EDT for Chittenden County, Vermont. It was in force for 85 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 29, 2005, 2:20 PM EDT (18:20 UTC)
Expired
Jun 29, 2005, 3:45 PM EDT
In force
85 min
Issued by
NWS Burlington, VT
Area
Counties, with a storm outline in the text

County Chittenden County, VT

The radar

The Burlington radar (KCXX), 13 km from the middle of the area, began a volume at 18:24 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jun 29, 2:40 PM EDTFLASH FLOODWilliston, VTSEVERAL ROADS CLOSED DUE TO WASHOUTS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 6.3 hours before the alert went out and 201 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 2005-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1143 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2005-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939Sfc1 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
1143 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
671 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
30 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KBTV 291821
FFWBTV
VTC007-291945-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BURLINGTON VT
220 PM EDT WED JUN 29 2005

THE NATIONAL WEATHER SERVICE IN BURLINGTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CHITTENDEN COUNTY IN NORTHWEST VERMONT

* UNTIL 345 PM EDT

* AT 219 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER ESSEX.

* LOCATIONS IN THE WARNING INCLUDE ESSEX JUNCTION...ESSEX 
  CENTER...AND WILLISTON.

ADDITIONAL RAINFALL AMOUNTS OF AN INCH IN LESS THAN AN HOUR ARE 
POSSIBLE.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

LAT...LON 4433 7319 4430 7292 4454 7286 4457 7321

$$

HANSON
2 follow-up statements
000 
WGUS71 KBTV 291904
FFSBTV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
302 PM EDT WED JUN 29 2005

VTC007-291945-
CHITTENDEN VT-
302 PM EDT WED JUN 29 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 345 PM EDT FOR CENTRAL
CHITTENDEN COUNTY...

AT 259 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED
AREA. RADAR ESTIMATES OF 1.5 TO 2 INCHES OF RAIN HAVE FALLEN IN THE 
PAST HOUR...AND AN ADDITIONAL HALF INCH IS POSSIBLE THROUGH 330 PM 
EDT. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ESSEX
JUNCTION...ESSEX CENTER...AND WILLISTON. ROAD CLOSURES HAVE BEEN 
REPORTED DUE TO HIGH WATER.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

LAT...LON 4439 7314 4439 7299 4449 7297 4450 7314

$$

HANSON
000 
WGUS71 KBTV 291943
FFSBTV

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
341 PM EDT WED JUN 29 2005

VTC007-291951-
CHITTENDEN VT-
341 PM EDT WED JUN 29 2005

...THE FLASH FLOOD WARNING FOR CENTRAL CHITTENDEN COUNTY EXPIRES AT
345 PM EDT...

THE STORM THAT PRODUCED HEAVY RAINFALL IN ESSEX AND WILLISTON HAS 
WEAKENED...AND ADDITIONAL FLOODING IS NOT EXPECTED.  MOTORISTS ON 
THE EVENING COMMUTE SHOULD BE CAREFUL DRIVING THROUGH ESSEX AND 
WILLISTON...AND OBEY ALL ROAD CLOSURE SIGNS. ALTHOUGH FLOOD WATERS 
HAVE RECEDED...THE ROAD UNDERNEATH MAY HAVE BEEN DAMAGED.

LAT...LON 4433 7319 4430 7292 4454 7286 4457 7321

$$

HANSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 9:20 PM EDTSevere Thunderstorm WarningBTVGrand Isle39 min
Jun 29, 2:50 PM EDTSevere Thunderstorm WarningBTVChittenden27 min
Jun 29, 5:13 PM EDTFlash Flood WarningBTVLamoille2 hr

Nearby

Flash Flood Warnings in Vermont, 2005Every flash flood warning in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.