Alert archive / Indiana / Mesoscale Discussions in 2005

Mesoscale Discussion 828

May 11, 200519 counties in Illinois; 40 counties in Indiana; 22 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 11, 2005, 6:28 PM CDT for 19 counties in Illinois; 40 counties in Indiana; 22 counties in Ohio. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 11, 2005, 6:28 PM CDT (23:28 UTC)
Expired
May 11, 2005, 8:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 81 counties

Christian County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Jasper County, IL, Lawrence County, IL, Macon County, IL, Montgomery County, IL, Moultrie County, IL, Piatt County, IL, Richland County, IL, Sangamon County, IL, Shelby County, IL, Adams County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Clay County, IN, Clinton County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Fountain County, IN, Franklin County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Jay County, IN, Johnson County, IN, Knox County, IN, Madison County, IN, Marion County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Tipton County, IN, Union County, IN, Vermillion County, IN, Vigo County, IN, Wayne County, IN, Wells County, IN, Allen County, OH, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Darke County, OH, Franklin County, OH, Greene County, OH, Hancock County, OH, Hardin County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Preble County, OH, Putnam County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Wyandot County, OH

The radar

The Indianapolis radar (KIND), 94 km from the middle of the area, began a volume at 23:28 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 nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.5 hours before the alert went out and 117 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, Lincoln, IL at 12:00Z on 2005-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1689 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, Lincoln, IL at 12:00Z on 2005-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 148 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
1689 J/kg
Mixed-layer CIN
-80 J/kg
Mixed-layer LCL
1125 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
148 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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, 3:11 AM CDTMesoscale DiscussionSPCBureau, Henry, Lee, Marshall, Mercer, Rock Island and 2 more2 hr
May 11, 8:41 AM CDTMesoscale DiscussionSPCAdams, Hancock2 hr
May 11, 1:37 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Christian, Coles and 22 more113 min
May 11, 1:55 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Calhoun, Cass, Fulton, Greene and 11 more6 hr
May 11, 3:21 PM CDTMesoscale DiscussionSPCChampaign, Clark, Coles, Cumberland, DeWitt, Douglas and 4 more114 min
May 11, 11:54 AM CDTMesoscale DiscussionSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 28 more2 hr
May 11, 12:25 PM CDTSevere Thunderstorm WatchSPCAdams, Blackford, Delaware, Fayette, Hancock, Henry and 9 more7 hr
May 11, 3:40 PM CDTSevere Thunderstorm WatchSPCAdams, Bartholomew, Blackford, Boone, Brown, Clay and 33 more5 hr

Nearby

Mesoscale Discussions in Indiana, 2005Mesoscale Discussions in Ohio, 2005Mesoscale Discussions in Illinois, 2005Every mesoscale discussion in 2005

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.