Alert archive / Ohio / Mesoscale Discussions in 2014

Mesoscale Discussion 1314

July 8, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2014, 11:29 AM EDT for 4 states. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Jul 8, 2014, 11:29 AM EDT (15:29 UTC)
Expired: Jul 8, 2014, 1:00 PM EDT
In force: 91 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 119 counties

Allegany County, NY, Broome County, NY, Cattaraugus County, NY, Cayuga County, NY, Chautauqua County, NY, Chemung County, NY, Chenango County, NY, Cortland County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Madison County, NY, Monroe County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, Ashland County, OH, Ashtabula County, OH, Belmont County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Geauga County, OH, Guernsey County, OH, Hardin County, OH, Harrison County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Monroe County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Portage County, OH, Richland County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Wayne County, OH, Wyandot County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Blair County, PA, Bradford County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Fayette County, PA, Forest County, PA, Greene County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lackawanna County, PA, Lawrence County, PA, Luzerne County, PA, Lycoming County, PA, McKean County, PA, Mercer County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Potter County, PA, Snyder County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Westmoreland County, PA, Wyoming County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV

The radar

The Pittsburgh radar (KPBZ), 115 km from the middle of the area, began a volume at 15:31 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 403Jul 8, 1:05 PM EDT

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 3.5 hours before the alert went out and 122 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: 96 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 909 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 205 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
Jul 8, 1:04 PM EDT	Severe Thunderstorm Watch	SPC	Allegany, Broome, Cattaraugus, Cayuga, Chautauqua, Chemung and 25 more	7 hr
Jul 8, 1:36 PM EDT	Mesoscale Discussion	SPC	Albany, Columbia, Essex, Fulton, Greene, Hamilton and 9 more	84 min
Jul 8, 4:00 PM EDT	Mesoscale Discussion	SPC	Allegany, Broome, Cattaraugus, Cayuga, Chautauqua, Chemung and 26 more	90 min
Jul 8, 5:39 PM EDT	Mesoscale Discussion	SPC	Albany, Bronx, Clinton, Columbia, Delaware, Dutchess and 26 more	66 min
Jul 8, 6:27 PM EDT	Severe Thunderstorm Watch	SPC	Albany, Bronx, Clinton, Columbia, Delaware, Dutchess and 26 more	6 hr
Jul 8, 7:44 PM EDT	Mesoscale Discussion	SPC	Albany, Bronx, Broome, Chenango, Columbia, Delaware and 26 more	61 min
Jul 8, 8:58 AM EDT	Mesoscale Discussion	SPC	Ashland, Crawford, Cuyahoga, Erie, Geauga, Hancock and 18 more	62 min
Jul 8, 4:42 PM EDT	Mesoscale Discussion	SPC	Adams, Berks, Bucks, Carbon, Chester, Cumberland and 15 more	63 min
Jul 8, 5:05 PM EDT	Severe Thunderstorm Watch	SPC	Berks, Bucks, Carbon, Chester, Delaware, Lancaster and 7 more	5 hr

Nearby

Mesoscale Discussions in Ohio, 2014 Mesoscale Discussions in Pennsylvania, 2014 Mesoscale Discussions in New York, 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.