Alert archive / Ohio / Mesoscale Discussions in 2003

Mesoscale Discussion 1888

July 18, 200322 counties in Ohio; 7 counties in Pennsylvania; 20 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2003, 6:47 PM EDT for 22 counties in Ohio; 7 counties in Pennsylvania; 20 counties in West Virginia. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Jul 18, 2003, 6:47 PM EDT (22:47 UTC)
Expired: Jul 18, 2003, 8:15 PM EDT
In force: 88 min
Issued by: the Storm Prediction Center

All 49 counties

Athens County, OH, Belmont County, OH, Carroll County, OH, Coshocton County, OH, Delaware County, OH, Fairfield County, OH, Franklin County, OH, Guernsey County, OH, Harrison County, OH, Hocking County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA, Barbour County, WV, Brooke County, WV, Doddridge County, WV, Gilmer County, WV, Hancock County, WV, Harrison County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Ritchie County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Pittsburgh radar (KPBZ), 115 km from the middle of the area, began a volume at 22:49 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, 10.8 hours before the alert went out and 111 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: 270 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1045 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 18, 1:35 PM EDT	Mesoscale Discussion	SPC	Athens, Belmont, Carroll, Columbiana, Coshocton, Delaware and 26 more	115 min
Jul 18, 1:55 PM EDT	Severe Thunderstorm Watch	SPC	Athens, Belmont, Carroll, Columbiana, Coshocton, Delaware and 17 more	6 hr
Jul 18, 4:49 PM EDT	Mesoscale Discussion	SPC	Athens, Belmont, Carroll, Coshocton, Fairfield, Guernsey and 12 more	116 min

Nearby

Mesoscale Discussions in Ohio, 2003 Mesoscale Discussions in West Virginia, 2003 Mesoscale Discussions in Pennsylvania, 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.