Alert archive / Ohio / Mesoscale Discussions in 2006

Mesoscale Discussion 488

April 12, 2006Chautauqua County, New York; 12 counties in Ohio; 9 counties in Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Apr 12, 2006, 6:07 PM EDT for Chautauqua County, New York; 12 counties in Ohio; 9 counties in Pennsylvania. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Apr 12, 2006, 6:07 PM EDT (22:07 UTC)
Expired: Apr 12, 2006, 7:00 PM EDT
In force: 53 min
Issued by: the Storm Prediction Center

All 22 counties

Chautauqua County, NY, Ashland County, OH, Ashtabula County, OH, Columbiana County, OH, Geauga County, OH, Holmes County, OH, Mahoning County, OH, Medina County, OH, Portage County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Wayne County, OH, Beaver County, PA, Butler County, PA, Clarion County, PA, Crawford County, PA, Erie County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Warren County, PA

The radar

The Cleveland radar (KCLE), 70 km from the middle of the area, began a volume at 22:08 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

Pittsburgh, PA (KPIT), launched 12:00Z, 10.1 hours before the alert went out and 126 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2362 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 104 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
Apr 12, 1:35 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Carroll, Champaign, Clark and 45 more	2 hr

Nearby

Mesoscale Discussions in Ohio, 2006 Mesoscale Discussions in Pennsylvania, 2006 Mesoscale Discussions in New York, 2006 Every mesoscale discussion in 2006

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.