Alert archive / Ohio / Mesoscale Discussions in 2020

Mesoscale Discussion 1580

August 26, 202028 counties in Ohio; 17 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2020, 2:04 PM EDT for 28 counties in Ohio; 17 counties in West Virginia. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Aug 26, 2020, 2:04 PM EDT (18:04 UTC)
Expired: Aug 26, 2020, 4:00 PM EDT
In force: 116 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

All 45 counties

Athens County, OH, Belmont County, OH, Coshocton County, OH, Fairfield County, OH, Franklin County, OH, Gallia County, OH, Guernsey County, OH, Harrison County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Jackson County, WV, Lewis County, WV, Marshall County, WV, Mason County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 150 km from the middle of the area, began a volume at 18:07 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, 6.1 hours before the alert went out and 189 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: 1697 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 25, 8:50 PM EDT	Mesoscale Discussion	SPC	Greenbrier, Logan, McDowell, Mercer, Mingo, Monroe and 3 more	115 min

Nearby

Mesoscale Discussions in Ohio, 2020 Mesoscale Discussions in West Virginia, 2020 Every mesoscale discussion in 2020

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.