Alert archive / Indiana / Mesoscale Discussions in 2015

Mesoscale Discussion 606

May 11, 20154 states

The Storm Prediction Center issued this mesoscale discussion at May 11, 2015, 12:48 PM EDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 11, 2015, 12:48 PM EDT (16:48 UTC)
Expired
May 11, 2015, 3:15 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 111 counties

Adams County, IN, Allen County, IN, Bartholomew County, IN, Blackford County, IN, Brown County, IN, Dearborn County, IN, Decatur County, IN, DeKalb County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Henry County, IN, Huntington County, IN, Jackson County, IN, Jay County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, LaGrange County, IN, Madison County, IN, Marion County, IN, Monroe County, IN, Morgan County, IN, Noble County, IN, Ohio County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Steuben County, IN, Switzerland County, IN, Tipton County, IN, Union County, IN, Wabash County, IN, Washington County, IN, Wayne County, IN, Wells County, IN, Whitley County, IN, Boone County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Kenton County, KY, Trimble County, KY, Branch County, MI, Calhoun County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Hillsdale County, MI, Ingham County, MI, Jackson County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saginaw County, MI, Saint Clair County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Fayette County, OH, Franklin County, OH, Fulton County, OH, Greene County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Huron County, OH, Logan County, OH, Lucas County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Preble County, OH, Putnam County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Warren County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Northern Indiana radar (KIWX), 123 km from the middle of the area, began a volume at 16:49 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, 4.8 hours before the alert went out and 150 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 2015-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2015-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1744 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
118 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
May 11, 1:14 PM EDTTornado WatchSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 49 more7 hr
May 11, 2:58 PM EDTMesoscale DiscussionSPCAdams, Jay, Randolph, Union, Wayne62 min
May 11, 4:03 PM EDTMesoscale DiscussionSPCClark, Crawford, Floyd, Harrison, Perry, Washington2 hr
May 11, 4:39 PM EDTMesoscale DiscussionSPCAdams, Dearborn, Decatur, Fayette, Franklin, Henry and 5 more66 min
May 11, 4:56 PM EDTSevere Thunderstorm WatchSPCClark, Crawford, Floyd, Harrison, Jefferson, Perry and 1 more5 hr
May 11, 1:53 PM EDTMesoscale DiscussionSPCAdair, Anderson, Barren, Bath, Bourbon, Boyd and 59 more3 hr
May 11, 2:19 PM EDTSevere Thunderstorm WatchSPCAdair, Anderson, Bath, Bourbon, Boyd, Boyle and 61 more8 hr
May 11, 4:13 PM EDTMesoscale DiscussionSPCAdair, Bath, Bourbon, Boyd, Boyle, Bracken and 41 more92 min
May 11, 6:23 PM EDTMesoscale DiscussionSPCAnderson, Bath, Boone, Bourbon, Boyle, Bracken and 33 more97 min
May 11, 3:46 PM EDTMesoscale DiscussionSPCArenac, Bay, Clare, Gladwin, Isabella, Midland and 2 more119 min
May 11, 4:24 PM EDTMesoscale DiscussionSPCColumbiana, Geauga, Mahoning, Portage, Stark, Summit and 1 more2 hr
May 11, 5:47 PM EDTSevere Thunderstorm WatchSPCAshtabula, Belmont, Carroll, Columbiana, Cuyahoga, Geauga and 12 more4 hr
May 11, 7:26 PM EDTMesoscale DiscussionSPCBelmont, Columbiana, Harrison, Jefferson, Mahoning, Monroe and 1 more64 min

Nearby

Mesoscale Discussions in Indiana, 2015Mesoscale Discussions in Ohio, 2015Mesoscale Discussions in Michigan, 2015Every mesoscale discussion in 2015

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.