Alert archive / Ohio / Mesoscale Discussions in 2003

Mesoscale Discussion 2264

August 26, 20035 counties in New York; 18 counties in Ohio; 13 counties in Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2003, 8:30 AM EDT for 5 counties in New York; 18 counties in Ohio; 13 counties in Pennsylvania. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 26, 2003, 8:30 AM EDT (12:30 UTC)
Expired: Aug 26, 2003, 10:30 AM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 36 counties

Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY, Steuben County, NY, Wyoming County, NY, Ashland County, OH, Ashtabula County, OH, Cuyahoga County, OH, Erie County, OH, Geauga County, OH, Hancock County, OH, Huron County, OH, Lake County, OH, Lorain County, OH, Mahoning County, OH, Medina County, OH, Ottawa County, OH, Portage County, OH, Sandusky County, OH, Seneca County, OH, Summit County, OH, Trumbull County, OH, Wayne County, OH, Cameron County, PA, Clarion County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Forest County, PA, Jefferson County, PA, Lawrence County, PA, McKean County, PA, Mercer County, PA, Potter County, PA, Venango County, PA, Warren County, PA

The radar

The Pittsburgh radar (KPBZ), 146 km from the middle of the area, began a volume at 12:32 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 watches that followed

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

Severe Thunderstorm Watch 891Aug 26, 9:10 AM EDT

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 0.5 hours before the alert went out and 158 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: 390 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 1045 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 26, 9:10 AM EDT	Severe Thunderstorm Watch	SPC	Allegany, Cattaraugus, Chautauqua, Steuben	5 hr
Aug 26, 12:27 AM EDT	Mesoscale Discussion	SPC	Ashtabula, Carroll, Columbiana, Cuyahoga, Erie, Geauga and 14 more	63 min
Aug 26, 11:08 AM EDT	Mesoscale Discussion	SPC	Ashland, Athens, Auglaize, Belmont, Carroll, Champaign and 32 more	2 hr
Aug 26, 1:05 PM EDT	Severe Thunderstorm Watch	SPC	Athens, Auglaize, Belmont, Butler, Carroll, Champaign and 39 more	5 hr
Aug 26, 2:19 PM EDT	Mesoscale Discussion	SPC	Monroe, Noble	116 min
Aug 26, 3:46 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Belmont, Carroll, Champaign and 37 more	119 min
Aug 26, 4:25 PM EDT	Severe Thunderstorm Watch	SPC	Allen, Ashland, Auglaize, Belmont, Carroll, Columbiana and 39 more	6 hr
Aug 26, 6:18 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Belmont, Carroll, Columbiana and 35 more	57 min
Aug 26, 7:55 PM EDT	Mesoscale Discussion	SPC	Ashland, Belmont, Carroll, Columbiana, Coshocton, Delaware and 21 more	65 min

Nearby

Mesoscale Discussions in Ohio, 2003 Mesoscale Discussions in Pennsylvania, 2003 Mesoscale Discussions in New York, 2003 Every mesoscale discussion in 2003

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.