Alert archive / Ohio / Mesoscale Discussions in 2007

Mesoscale Discussion 1469

July 13, 200719 counties in Ohio; 4 counties in Pennsylvania; 12 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2007, 2:32 PM EDT for 19 counties in Ohio; 4 counties in Pennsylvania; 12 counties in West Virginia. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jul 13, 2007, 2:32 PM EDT (18:32 UTC)
Expired: Jul 13, 2007, 3:30 PM EDT
In force: 58 min
Issued by: the Storm Prediction Center

All 35 counties

Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Fairfield County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Vinton County, OH, Washington County, OH, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA, Doddridge County, WV, Harrison County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Ritchie County, WV, Taylor County, WV, Tyler County, WV, Wetzel County, WV, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 141 km from the middle of the area, began a volume at 18:35 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, 6.5 hours before the alert went out and 180 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: 1557 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 114 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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Nearby

Mesoscale Discussions in Ohio, 2007 Mesoscale Discussions in West Virginia, 2007 Mesoscale Discussions in Pennsylvania, 2007 Every mesoscale discussion in 2007

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.