Alert archive / Indiana / Mesoscale Discussions in 2014

Mesoscale Discussion 1478

July 27, 20145 counties in Illinois; 26 counties in Indiana; 20 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Jul 27, 2014, 3:34 AM CDT for 5 counties in Illinois; 26 counties in Indiana; 20 counties in Kentucky. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Jul 27, 2014, 3:34 AM CDT (08:34 UTC)
Expired
Jul 27, 2014, 5:30 AM CDT
In force
116 min
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 51 counties

Champaign County, IL, Clark County, IL, Douglas County, IL, Edgar County, IL, Vermilion County, IL, Brown County, IN, Clark County, IN, Clay County, IN, Crawford County, IN, Daviess County, IN, Dubois County, IN, Floyd County, IN, Fountain County, IN, Greene County, IN, Harrison County, IN, Jackson County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Orange County, IN, Owen County, IN, Parke County, IN, Perry County, IN, Putnam County, IN, Scott County, IN, Sullivan County, IN, Vermillion County, IN, Vigo County, IN, Washington County, IN, Anderson County, KY, Boyle County, KY, Bullitt County, KY, Casey County, KY, Garrard County, KY, Green County, KY, Hardin County, KY, Jefferson County, KY, Larue County, KY, Lincoln County, KY, Marion County, KY, Meade County, KY, Mercer County, KY, Nelson County, KY, Oldham County, KY, Shelby County, KY, Spencer County, KY, Taylor County, KY, Trimble County, KY, Washington County, KY

The radar

The Indianapolis radar (KIND), 92 km from the middle of the area, began a volume at 08:36 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 00:00Z, 8.6 hours before the alert went out and 230 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 00:00Z on 2014-07-27Temperature 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, Lincoln, IL at 00:00Z on 2014-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
1828 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
110 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 26, 8:11 PM CDTMesoscale DiscussionSPCEdwards, Gallatin, Hamilton, Hardin, Lawrence, Pope and 3 more64 min
Jul 27, 1:39 PM CDTMesoscale DiscussionSPCClark, Crawford, Edgar, Vermilion66 min
Jul 27, 10:19 AM CDTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Harrison, Martin and 5 more116 min
Jul 27, 12:39 PM CDTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Cass, DeKalb, Elkhart and 18 more6 hr
Jul 27, 12:44 PM CDTTornado WatchSPCDearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more9 hr
Jul 27, 3:55 PM CDTMesoscale DiscussionSPCAdams, Allen, Blackford, DeKalb, Elkhart, Grant and 9 more65 min
Jul 26, 8:41 PM CDTSevere Thunderstorm WatchSPCAdair, Allen, Anderson, Barren, Bourbon, Boyle and 50 more3 hr
Jul 26, 10:29 PM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bourbon, Boyle and 54 more61 min
Jul 27, 12:00 PM CDTTornado WatchSPCAdair, Allen, Anderson, Barren, Bath, Bell and 65 more11 hr
Jul 27, 2:14 PM CDTMesoscale DiscussionSPCAdair, Allen, Barren, Bath, Bell, Bourbon and 53 more2 hr
Jul 27, 6:28 PM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bell and 56 more92 min

Nearby

Mesoscale Discussions in Indiana, 2014Mesoscale Discussions in Kentucky, 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.