Alert archive / New York / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 795

August 29, 20045 states

The Storm Prediction Center issued this severe thunderstorm watch at Aug 29, 2004, 1:20 PM EDT for 5 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Aug 29, 2004, 1:20 PM EDT (17:20 UTC)
Expired
Aug 29, 2004, 7:00 PM EDT
In force
6 hr
Issued by
the Storm Prediction Center
All 65 counties

Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Oxford County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Sullivan County, NH, Albany County, NY, Allegany County, NY, Broome County, NY, Cattaraugus County, NY, Cayuga County, NY, Chemung County, NY, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Essex County, NY, Franklin County, NY, Fulton County, NY, Genesee County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Jefferson County, NY, Lewis County, NY, Livingston County, NY, Madison County, NY, Monroe County, NY, Montgomery County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Otsego County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Schuyler County, NY, Seneca County, NY, St. Lawrence County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Warren County, NY, Washington County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, Addison County, VT, Bennington County, VT, Caledonia County, VT, Chittenden County, VT, Lamoille County, VT, Orange County, VT, Rutland County, VT, Washington County, VT, Windham County, VT, Windsor County, VT

Warnings issued inside it

24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Aug 29, 1:32 PM EDTSevere Thunderstorm WarningBGMOneida28 min
Aug 29, 1:37 PM EDTTornado WarningGYXMerrimack23 min
Aug 29, 1:53 PM EDTSevere Thunderstorm WarningGYXSullivan67 min
Aug 29, 1:57 PM EDTSevere Thunderstorm WarningBGMOneida63 min
Aug 29, 2:03 PM EDTSevere Thunderstorm WarningBUFLivingston27 min
Aug 29, 2:07 PM EDTSevere Thunderstorm WarningBUFMonroe53 min
Aug 29, 2:13 PM EDTSevere Thunderstorm WarningBTVSt. Lawrence47 min
Aug 29, 2:30 PM EDTFlash Flood WarningBGMOneida30 min
Aug 29, 2:30 PM EDTFlash Flood WarningBGMOneida2 hr
Aug 29, 2:37 PM EDTSevere Thunderstorm WarningALYHerkimer53 min
Aug 29, 2:55 PM EDTFlash Flood WarningBUFMonroe3 hr
Aug 29, 3:10 PM EDTFlash Flood WarningBUFWayne3 hr
Aug 29, 4:18 PM EDTSevere Thunderstorm WarningALYWarren27 min
Aug 29, 4:34 PM EDTSevere Thunderstorm WarningBGMSchuyler, Steuben26 min
Aug 29, 4:52 PM EDTSevere Thunderstorm WarningALYWashington23 min
Aug 29, 5:11 PM EDTSevere Thunderstorm WarningBUFCattaraugus34 min
Aug 29, 5:13 PM EDTSevere Thunderstorm WarningALYWarren, Washington32 min
Aug 29, 5:19 PM EDTSevere Thunderstorm WarningBTVEssex41 min
Aug 29, 5:25 PM EDTSevere Thunderstorm WarningBGMCayuga, Seneca65 min
Aug 29, 5:32 PM EDTSevere Thunderstorm WarningBGMOneida58 min
Aug 29, 5:46 PM EDTSevere Thunderstorm WarningALYWashington29 min
Aug 29, 5:51 PM EDTSevere Thunderstorm WarningBGMCortland, Onondaga39 min
Aug 29, 6:00 PM EDTSevere Thunderstorm WarningBTVChittenden, Lamoille45 min
Aug 29, 6:06 PM EDTSevere Thunderstorm WarningBUFOntario54 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 5.3 hours before the alert went out and 151 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 2004-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 378 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 2004-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 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
378 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
639 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 29, 3:46 PM EDTMesoscale DiscussionSPCOxford119 min
Aug 29, 6:13 PM EDTMesoscale DiscussionSPCOxford92 min
Aug 29, 12:45 PM EDTMesoscale DiscussionSPCBerkshire, Franklin3 hr

Nearby

Severe Thunderstorm Watches in New York, 2004Severe Thunderstorm Watches in Vermont, 2004Severe Thunderstorm Watches in New Hampshire, 2004Every severe thunderstorm watch in 2004

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.