Alert archive / New York / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 529

July 1, 200418 counties in New York; 5 counties in Vermont

The Storm Prediction Center issued this severe thunderstorm watch at Jul 1, 2004, 12:20 PM EDT for 18 counties in New York; 5 counties in Vermont. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 1, 2004, 12:20 PM EDT (16:20 UTC)
Expired
Jul 1, 2004, 6:00 PM EDT
In force
6 hr
Issued by
the Storm Prediction Center
All 23 counties

Cayuga County, NY, Clinton County, NY, Essex County, NY, Franklin County, NY, Genesee County, NY, Hamilton County, NY, Herkimer County, NY, Jefferson County, NY, Lewis County, NY, Madison County, NY, Monroe County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Seneca County, NY, St. Lawrence County, NY, Wayne County, NY, Chittenden County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orleans County, VT

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 1, 1:15 PM EDTSevere Thunderstorm WarningBTVEssex60 min
Jul 1, 2:13 PM EDTSevere Thunderstorm WarningBTVEssex62 min
Jul 1, 2:17 PM EDTSevere Thunderstorm WarningBTVClinton58 min
Jul 1, 3:04 PM EDTSevere Thunderstorm WarningBTVEssex56 min
Jul 1, 3:06 PM EDTSevere Thunderstorm WarningBTVChittenden54 min
Jul 1, 3:15 PM EDTSevere Thunderstorm WarningBUFLewis60 min
Jul 1, 3:40 PM EDTSevere Thunderstorm WarningBTVClinton65 min
Jul 1, 3:52 PM EDTSevere Thunderstorm WarningALYHamilton, Herkimer53 min
Jul 1, 3:56 PM EDTSevere Thunderstorm WarningBTVChittenden64 min
Jul 1, 4:00 PM EDTSevere Thunderstorm WarningBGMOneida30 min
Jul 1, 4:59 PM EDTSevere Thunderstorm WarningBTVChittenden31 min
Jul 1, 5:04 PM EDTSevere Thunderstorm WarningBTVLamoille56 min
Jul 1, 5:13 PM EDTSevere Thunderstorm WarningBTVClinton62 min
Jul 1, 5:16 PM EDTSevere Thunderstorm WarningBTVEssex, Franklin59 min
Jul 1, 5:18 PM EDTSevere Thunderstorm WarningBUFOswego42 min
Jul 1, 5:23 PM EDTSevere Thunderstorm WarningALYHamilton52 min
Jul 1, 5:36 PM EDTSevere Thunderstorm WarningBTVGrand Isle24 min
Jul 1, 5:49 PM EDTSevere Thunderstorm WarningBTVFranklin56 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, 4.3 hours before the alert went out and 204 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 2004-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 178 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 2004-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
178 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
937 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 1, 11:13 AM EDTMesoscale DiscussionSPCCayuga, Essex, Fulton, Hamilton, Herkimer, Lewis and 5 more2 hr
Jul 1, 2:53 PM EDTMesoscale DiscussionSPCAlbany, Clinton, Columbia, Delaware, Dutchess, Essex and 13 more2 hr
Jul 1, 4:10 PM EDTSevere Thunderstorm WatchSPCFulton, Montgomery, Saratoga, Schenectady, Warren, Washington5 hr
Jul 1, 4:46 PM EDTMesoscale DiscussionSPCCayuga, Essex, Hamilton, Herkimer, Lewis, Monroe and 4 more59 min
Jul 1, 5:35 PM EDTSevere Thunderstorm WatchSPCClinton, Essex, Franklin, Hamilton, Herkimer, Lewis and 3 more3 hr
Jul 1, 6:49 PM EDTMesoscale DiscussionSPCClinton, Essex, Franklin, Fulton, Hamilton, Herkimer and 10 more86 min

Nearby

Severe Thunderstorm Watches in New York, 2004Severe Thunderstorm Watches in Vermont, 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.