Alert archive / Ohio / Mesoscale Discussions in 2014

Mesoscale Discussion 134

February 20, 201429 counties in Kentucky; 55 counties in Ohio; 6 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Feb 20, 2014, 11:38 PM EST for 29 counties in Kentucky; 55 counties in Ohio; 6 counties in West Virginia. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Feb 20, 2014, 11:38 PM EST (04:38 UTC)
Expired: Feb 21, 2014, 12:45 AM EST
In force: 67 min
Issued by: the Storm Prediction Center

All 90 counties

Bath County, KY, Boone County, KY, Bourbon County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carter County, KY, Clark County, KY, Elliott County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Henry County, KY, Kenton County, KY, Lawrence County, KY, Lewis County, KY, Mason County, KY, Menifee County, KY, Montgomery County, KY, Nicholas County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Adams County, OH, Ashland County, OH, Athens County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Coshocton County, OH, Crawford County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Jackson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Medina County, OH, Meigs County, OH, Miami County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Richland County, OH, Ross County, OH, Sandusky County, OH, Scioto County, OH, Seneca County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wayne County, OH, Wyandot County, OH, Cabell County, WV, Jackson County, WV, Lincoln County, WV, Mason County, WV, Putnam County, WV, Wayne County, WV

The radar

The Cincinnati radar (KILN), 88 km from the middle of the area, began a volume at 04:38 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 20Feb 21, 12:00 AM EST

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 4.6 hours before the alert went out and 86 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: 1388 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 487 m²/s²
0-3 km storm-relative helicity: 629 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
Feb 20, 9:19 PM EST	Mesoscale Discussion	SPC	Adair, Allen, Anderson, Barren, Boone, Boyle and 41 more	86 min
Feb 20, 10:29 PM EST	Mesoscale Discussion	SPC	Bell, Breathitt, Clay, Estill, Harlan, Jackson and 10 more	61 min
Feb 20, 10:47 PM EST	Tornado Watch	SPC	Bath, Bell, Breathitt, Clay, Elliott, Estill and 27 more	6 hr
Feb 21, 12:02 AM EST	Severe Thunderstorm Watch	SPC	Boyd, Bracken, Carter, Greenup, Lawrence, Lewis and 3 more	4 hr
Feb 20, 9:19 PM EST	Severe Thunderstorm Watch	SPC	Allen, Auglaize, Champaign, Clark, Clermont, Crawford and 26 more	3 hr
Feb 21, 2:21 AM EST	Mesoscale Discussion	SPC	Boone, Braxton, Calhoun, Clay, Doddridge, Fayette and 11 more	54 min

Nearby

Mesoscale Discussions in Ohio, 2014 Mesoscale Discussions in Kentucky, 2014 Mesoscale Discussions in West Virginia, 2014 Every mesoscale discussion in 2014

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.