Alert archive / Vermont / Flash Flood Watches in 2009

Flash Flood Watch 2, NWS Burlington, VT

July 2, 200911 counties in Vermont; 4 counties in New York

NWS Burlington, VT issued this flash flood watch at Jul 2, 2009, 4:10 AM EDT for 11 counties in Vermont; 4 counties in New York. It took effect at Jul 2, 2009, 6:00 PM EDT. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jul 2, 2009, 4:10 AM EDT (08:10 UTC)
In effect from
Jul 2, 2009, 6:00 PM EDT
Expired
Jul 2, 2009, 9:30 PM EDT
In force
4 hr
Issued by
NWS Burlington, VT
Flood severity
None

Counties Clinton County, NY, Essex County, NY, Franklin County, NY, St. Lawrence County, NY, Addison County, VT, Caledonia County, VT, Chittenden County, VT, Essex County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 8.2 hours before the alert went out and 398 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, Brookhaven, NY at 00:00Z on 2009-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 108 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, Brookhaven, NY at 00:00Z on 2009-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 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
108 J/kg
Mixed-layer CIN
-156 J/kg
Mixed-layer LCL
752 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
195 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 8:02 PM EDTAreal Flood AdvisoryBTVSt. Lawrence3 hr
Jul 1, 10:53 PM EDTAreal Flood AdvisoryBTVSt. Lawrence2 hr

Nearby

Flash Flood Watches in Vermont, 2009Flash Flood Watches in New York, 2009Every flash flood watch in 2009

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.