Alert archive / New York / Mesoscale Discussions in 2004

Mesoscale Discussion 1456

July 1, 200411 counties in New York; 4 counties in Vermont

The Storm Prediction Center issued this mesoscale discussion at Jul 1, 2004, 11:13 AM EDT for 11 counties in New York; 4 counties in Vermont. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 1, 2004, 11:13 AM EDT (15:13 UTC)
Expired: Jul 1, 2004, 1:15 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Cayuga County, NY, Essex County, NY, Fulton County, NY, Hamilton County, NY, Herkimer County, NY, Lewis County, NY, Madison County, NY, Oneida County, NY, Onondaga County, NY, Oswego County, NY, Warren County, NY, Addison County, VT, Chittenden County, VT, Franklin County, VT, Grand Isle County, VT

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 529Jul 1, 12:20 PM EDT

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 3.2 hours before the alert went out and 123 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 1, 12:20 PM EDT	Severe Thunderstorm Watch	SPC	Cayuga, Clinton, Essex, Franklin, Genesee, Hamilton and 12 more	6 hr
Jul 1, 2:53 PM EDT	Mesoscale Discussion	SPC	Albany, Clinton, Columbia, Delaware, Dutchess, Essex and 13 more	2 hr
Jul 1, 4:10 PM EDT	Severe Thunderstorm Watch	SPC	Fulton, Montgomery, Saratoga, Schenectady, Warren, Washington	5 hr
Jul 1, 4:46 PM EDT	Mesoscale Discussion	SPC	Cayuga, Essex, Hamilton, Herkimer, Lewis, Monroe and 4 more	59 min
Jul 1, 5:35 PM EDT	Severe Thunderstorm Watch	SPC	Clinton, Essex, Franklin, Hamilton, Herkimer, Lewis and 3 more	3 hr
Jul 1, 6:49 PM EDT	Mesoscale Discussion	SPC	Clinton, Essex, Franklin, Fulton, Hamilton, Herkimer and 10 more	86 min

Nearby

Mesoscale Discussions in New York, 2004 Mesoscale Discussions in Vermont, 2004 Every mesoscale discussion 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.