Alert archive / Indiana / Mesoscale Discussions in 2014

Mesoscale Discussion 1064

June 18, 201413 counties in Illinois; 29 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2014, 2:56 PM CDT for 13 counties in Illinois; 29 counties in Indiana. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Jun 18, 2014, 2:56 PM CDT (19:56 UTC)
Expired
Jun 18, 2014, 4:30 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 42 counties

Champaign County, IL, Clark County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Jasper County, IL, Moultrie County, IL, Piatt County, IL, Shelby County, IL, Vermilion County, IL, Blackford County, IN, Boone County, IN, Brown County, IN, Carroll County, IN, Clay County, IN, Clinton County, IN, Delaware County, IN, Fountain County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Howard County, IN, Johnson 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, Shelby County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN

The radar

The Indianapolis radar (KIND), 96 km from the middle of the area, began a volume at 19:59 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, 7.9 hours before the alert went out and 120 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 2014-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1711 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 2014-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -45 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
1711 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
922 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-45 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.4

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 17, 9:38 PM CDTMesoscale DiscussionSPCBoone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 8 more97 min
Jun 17, 10:13 PM CDTSevere Thunderstorm WatchSPCBoone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 10 more6 hr
Jun 18, 12:59 AM CDTMesoscale DiscussionSPCBoone, Lake, McHenry, Stephenson, Winnebago91 min
Jun 18, 5:36 AM CDTMesoscale DiscussionSPCJo Daviess54 min
Jun 18, 6:06 PM CDTMesoscale DiscussionSPCBoone, Carroll, DeKalb, DuPage, Kane, Lee and 3 more54 min
Jun 18, 10:32 AM CDTMesoscale DiscussionSPCAllen, DeKalb, Elkhart, Kosciusko, LaGrange, LaPorte and 6 more118 min
Jun 18, 12:55 PM CDTSevere Thunderstorm WatchSPCAdams, Allen, DeKalb, Elkhart, Fulton, Huntington and 12 more6 hr
Jun 18, 3:32 PM CDTMesoscale DiscussionSPCBlackford, Delaware, Jay, Randolph, Union, Wayne88 min
Jun 18, 3:43 PM CDTMesoscale DiscussionSPCAdams, Allen, DeKalb, Grant, Huntington, Miami and 3 more2 hr
Jun 18, 5:30 PM CDTMesoscale DiscussionSPCBartholomew, Dearborn, Decatur, Fayette, Franklin, Henry and 6 more60 min
Jun 18, 6:00 PM CDTSevere Thunderstorm WatchSPCDearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more5 hr

Nearby

Mesoscale Discussions in Indiana, 2014Mesoscale Discussions in Illinois, 2014Every 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.