Alert archive / Vermont / Flash Flood Warnings in 1999

Flash Flood Warning 13, NWS Burlington, VT

March 23, 1999Franklin County, Vermont

NWS Burlington, VT issued this flash flood warning at Mar 23, 1999, 12:33 PM EST for Franklin County, Vermont. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Mar 23, 1999, 12:33 PM EST (17:33 UTC)
Expired
Mar 23, 1999, 8:30 PM EST
In force
8 hr
Issued by
NWS Burlington, VT
Area
Whole counties

County Franklin County, VT

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 5.6 hours before the alert went out and 252 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 1999-03-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 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 1999-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.1939587897Sfc1 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
17 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
676 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

NWS Burlington, VT wrote its last area forecast discussion before this flash flood warning went out at Mar 23, 10:40 AM EST, 1 hour 53 minutes earlier.

Area forecast discussion, Mar 23, 10:40 AM EST, 1 hour 53 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BURLINGTON VT
1040 AM EST TUE MAR 23 1999

WILL MAKE A FEW CHANGES FOR THE AFTERNOON PACKAGE.  WL GO WITH
PARTLY SUNNY SKIES FOR CHAMPLAIN VLY AND REMOVE MENTION OF FLURRIES
HERE...AND WL ALSO BOOST TEMPS HERE INTO THE LOWER 40S.  HAVE ALSO
BOOSTED TEMPS UP IN ST LAWRENCE VLY AND ACROSS MOST VT ZONES.
WILL ALSO CHANGE FCST FOR TONIGHT TO PARTLY CLOUDY...AND DROP
MENTION OF FLURRIES FOR TONIGHT IN THOSE ZONES WHICH HAD IT IN
PREVIOUS FCST PACKAGE.

WL KEEP A MENTION OF FLURRIES THIS AFTN IN ADIRONDACK ZONES...AS
RADAR AND SAT LOOP SHOWING NARROW BAND OF LK EFFECT SNOW CONTINUING
TO MOVE E INTO SRN END OF ADIRONDACK ZONES.

HYDRO WISE...RIVERS CONTINUE TO RECEDE...BUT LAMOILLE RIVER
IN EAST GEORGIA VT STILL ABOVE FLOOD STAGE...AND WILL EXTEND
FLOOD WARNING HERE INTO EARLY TONIGHT.

WORK ZONES IN ALBADMBTV

.BTV...FLOOD WARNING FOR THE LAMOILLE RIVER IN EAST GEORGIA
       VERMONT (FRANKLIN COUNTY).

WGH

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 22, 10:55 PM ESTFlash Flood WarningBTVFranklin8 hr
Mar 23, 6:34 AM ESTFlash Flood WarningBTVFranklin6 hr

Nearby

Flash Flood Warnings in Vermont, 1999Every flash flood warning in 1999

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.