Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 1577

July 11, 20115 states

The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2011, 3:43 PM EDT for 5 states. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Jul 11, 2011, 3:43 PM EDT (19:43 UTC)
Expired
Jul 11, 2011, 5:15 PM EDT
In force
92 min
Issued by
the Storm Prediction Center
All 111 counties

Dearborn County, IN, Ohio County, IN, Ripley County, IN, Switzerland County, IN, Bath County, KY, Boone County, KY, Bourbon County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Carter County, KY, Elliott 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, Montgomery County, KY, Nicholas County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Shelby County, KY, Trimble County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Butler County, OH, Carroll County, OH, Clermont County, OH, Clinton County, OH, Columbiana County, OH, Fairfield County, OH, Fayette County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Jefferson County, OH, Lawrence County, OH, Madison County, OH, Mahoning County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Trumbull County, OH, Tuscarawas County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Crawford County, PA, Fayette County, PA, Greene County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Washington County, PA, Westmoreland County, PA, Boone County, WV, 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, Lewis County, WV, Lincoln County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tyler County, WV, Wayne County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 117 km from the middle of the area, began a volume at 19:46 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, 7.7 hours before the alert went out and 115 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 2011-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 95 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 2011-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 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
95 J/kg
Mixed-layer CIN
-371 J/kg
Mixed-layer LCL
1367 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
133 m²/s²
0-3 km storm-relative helicity
143 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.

IssuedProductOfficeCountiesLasted
Jul 11, 6:37 AM EDTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Cass, DeKalb, Elkhart and 22 more6 hr
Jul 11, 8:10 AM EDTMesoscale DiscussionSPCAllen, Cass, DeKalb, Elkhart, Fulton, Huntington and 17 more95 min
Jul 11, 8:50 AM EDTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Benton, Blackford, Boone and 68 more55 min
Jul 11, 10:55 AM EDTMesoscale DiscussionSPCAdams, Allen, Blackford, Carroll, Cass, Clinton and 26 more65 min
Jul 11, 12:34 PM EDTMesoscale DiscussionSPCAdams, Allen, Blackford, Delaware, Grant, Huntington and 5 more56 min
Jul 11, 5:54 PM EDTMesoscale DiscussionSPCDearborn, Franklin, Ohio96 min
Jul 11, 6:16 PM EDTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 28 more59 min
Jul 11, 7:18 PM EDTSevere Thunderstorm WatchSPCAdams, Blackford, Boone, Carroll, Cass, Clinton and 30 more3 hr
Jul 11, 10:16 AM EDTSevere Thunderstorm WatchSPCLewis9 hr
Jul 11, 2:16 PM EDTSevere Thunderstorm WatchSPCBoyd, Carter, Greenup, Lawrence6 hr
Jul 11, 1:42 PM EDTMesoscale DiscussionSPCAshland, Ashtabula, Athens, Auglaize, Belmont, Carroll and 59 more93 min
Jul 11, 5:47 PM EDTSevere Thunderstorm WatchSPCBedford, Blair, Cambria, Franklin, Fulton, Huntingdon and 2 more5 hr
Jul 11, 7:44 PM EDTMesoscale DiscussionSPCAdams, Bedford, Cumberland, Dauphin, Franklin, Fulton and 4 more61 min

Nearby

Mesoscale Discussions in Ohio, 2011Mesoscale Discussions in Kentucky, 2011Mesoscale Discussions in West Virginia, 2011Every mesoscale discussion in 2011

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.