Alert archive / Indiana / Mesoscale Discussions in 2014

Mesoscale Discussion 569

May 11, 2014Clark County, Coles County, Edgar County, Illinois; 26 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at May 11, 2014, 5:49 PM CDT for Clark County, Coles County, Edgar County, Illinois; 26 counties in Indiana. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: May 11, 2014, 5:49 PM CDT (22:49 UTC)
Expired: May 11, 2014, 6:45 PM CDT
In force: 56 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 29 counties

Clark County, IL, Coles County, IL, Edgar County, IL, Bartholomew County, IN, Brown County, IN, Clay County, IN, Decatur County, IN, Fayette County, IN, Fountain County, IN, Greene County, IN, Hancock County, IN, Hendricks County, IN, Jackson County, IN, Jennings County, IN, Johnson County, IN, Lawrence County, IN, Marion County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Vermillion County, IN, Vigo County, IN

The radar

The Indianapolis radar (KIND), 53 km from the middle of the area, began a volume at 22:49 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 nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.8 hours before the alert went out and 198 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1968 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 148 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.

Issued	Product	Office	Counties	Lasted
May 10, 7:55 PM CDT	Mesoscale Discussion	SPC	Calhoun, Greene, Jersey, Macoupin, Madison, Monroe and 2 more	95 min
May 10, 10:22 PM CDT	Mesoscale Discussion	SPC	Calhoun, Jersey, Madison, Monroe, Randolph, Saint Clair	83 min
May 11, 9:16 AM CDT	Mesoscale Discussion	SPC	Mercer, Rock Island	89 min
May 11, 10:47 AM CDT	Mesoscale Discussion	SPC	Hancock	118 min
May 11, 11:53 AM CDT	Tornado Watch	SPC	Carroll, Henderson, Henry, Mercer, Rock Island, Warren and 1 more	7 hr
May 11, 12:51 PM CDT	Mesoscale Discussion	SPC	Carroll, Henderson, Jo Daviess, Mercer, Rock Island, Whiteside	54 min
May 11, 2:36 PM CDT	Mesoscale Discussion	SPC	Mercer	84 min
May 11, 3:05 PM CDT	Severe Thunderstorm Watch	SPC	Boone, Bureau, Cook, DeKalb, DuPage, Ford and 23 more	7 hr
May 11, 5:09 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Cook, DeKalb, DuPage, Grundy and 21 more	66 min

Nearby

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