Alert archive / Ohio / Mesoscale Discussions in 2012

Mesoscale Discussion 1310

June 29, 20124 states

The Storm Prediction Center issued this mesoscale discussion at Jun 29, 2012, 4:22 PM EDT for 4 states. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Jun 29, 2012, 4:22 PM EDT (20:22 UTC)
Expired
Jun 29, 2012, 5:45 PM EDT
In force
83 min
Issued by
the Storm Prediction Center
All 115 counties

Bartholomew County, IN, Dearborn County, IN, Decatur County, IN, Fayette County, IN, Franklin County, IN, Hancock County, IN, Henry County, IN, Jennings County, IN, Johnson County, IN, Marion County, IN, Ohio County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Switzerland County, IN, Union County, IN, Wayne County, IN, Boone County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carter County, KY, Fleming County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Pendleton County, KY, Robertson County, KY, Adams County, OH, Ashland County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Butler County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Coshocton County, OH, Crawford County, OH, Delaware 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, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Meigs County, OH, Miami County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Seneca County, OH, Stark County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wayne County, OH, Wyandot County, OH, Braxton County, WV, Brooke County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Gilmer County, WV, Hancock County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lincoln County, WV, Marshall County, WV, Mason County, WV, Ohio 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), 70 km from the middle of the area, began a volume at 20:23 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.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.4 hours before the alert went out and 68 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2012-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3674 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2012-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -59 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
3674 J/kg
Mixed-layer CIN
-139 J/kg
Mixed-layer LCL
979 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-59 m²/s²
0-3 km storm-relative helicity
-13 m²/s²
Significant tornado parameter
0.0
Supercell composite
9.4

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.

IssuedProductOfficeCountiesLasted
Jun 28, 8:25 PM EDTSevere Thunderstorm WatchSPCCass, Fulton, Jasper, LaPorte, Porter, Pulaski and 2 more2 hr
Jun 28, 9:26 PM EDTMesoscale DiscussionSPCFulton, Jasper, Lake, Marshall, Porter, Pulaski and 1 more64 min
Jun 28, 10:42 PM EDTMesoscale DiscussionSPCFulton, LaPorte, Marshall, Pulaski, Starke63 min
Jun 29, 10:22 AM EDTMesoscale DiscussionSPCAdams, Benton, Blackford, Boone, Carroll, Cass and 38 more2 hr
Jun 29, 11:49 AM EDTSevere Thunderstorm WatchSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 48 more6 hr
Jun 29, 2:01 PM EDTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Blackford, Boone, Carroll and 48 more119 min
Jun 29, 3:02 PM EDTSevere Thunderstorm WatchSPCDearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more5 hr
Jun 29, 3:07 PM EDTMesoscale DiscussionSPCAdams, Delaware, Fayette, Franklin, Henry, Jay and 4 more53 min
Jun 29, 6:03 PM EDTMesoscale DiscussionSPCBath, Bourbon, Boyd, Bracken, Campbell, Carter and 27 more87 min
Jun 29, 6:34 PM EDTSevere Thunderstorm WatchSPCLawrence6 hr
Jun 29, 7:51 PM EDTMesoscale DiscussionSPCBreathitt, Floyd, Johnson, Knott, Magoffin, Martin and 2 more114 min
Jun 28, 8:53 PM EDTMesoscale DiscussionSPCAshtabula, Cuyahoga, Erie, Geauga, Huron, Lake and 5 more97 min

Nearby

Mesoscale Discussions in Ohio, 2012Mesoscale Discussions in West Virginia, 2012Mesoscale Discussions in Indiana, 2012Every mesoscale discussion in 2012

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.