Alert archive / New York / Mesoscale Discussions in 2004

Mesoscale Discussion 1948

August 10, 200424 counties in New York; 9 counties in Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2004, 7:27 PM EDT for 24 counties in New York; 9 counties in Pennsylvania. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Aug 10, 2004, 7:27 PM EDT (23:27 UTC)
Expired: Aug 10, 2004, 9:00 PM EDT
In force: 93 min
Issued by: the Storm Prediction Center

All 33 counties

Allegany County, NY, Broome County, NY, Cayuga County, NY, Chemung County, NY, Chenango County, NY, Cortland County, NY, Delaware County, NY, Lewis County, NY, Livingston County, NY, Madison County, NY, Monroe County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Otsego County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, Bradford County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Lycoming County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Wyoming County, PA

The radar

The Binghamton radar (KBGM), 116 km from the middle of the area, began a volume at 23:27 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.5 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: 465 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 850 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.7

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
Aug 10, 11:54 AM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 6 more	96 min
Aug 10, 1:10 PM EDT	Severe Thunderstorm Watch	SPC	Allegany, Broome, Cattaraugus, Cayuga, Chautauqua, Chemung and 21 more	7 hr
Aug 10, 4:16 PM EDT	Mesoscale Discussion	SPC	Allegany, Broome, Cattaraugus, Cayuga, Chautauqua, Chemung and 22 more	89 min

Nearby

Mesoscale Discussions in New York, 2004 Mesoscale Discussions in Pennsylvania, 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; radar from the NEXRAD Level II archive.