Alert archive / Illinois / Mesoscale Discussions in 2015

Mesoscale Discussion 1407

July 14, 201514 counties in Illinois; 8 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2015, 12:56 AM CDT for 14 counties in Illinois; 8 counties in Indiana. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Jul 14, 2015, 12:56 AM CDT (05:56 UTC)
Expired: Jul 14, 2015, 2:00 AM CDT
In force: 64 min
Issued by: the Storm Prediction Center

All 22 counties

Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Jasper County, IL, Lawrence County, IL, Moultrie County, IL, Richland County, IL, Shelby County, IL, Wabash County, IL, Clay County, IN, Daviess County, IN, Gibson County, IN, Greene County, IN, Knox County, IN, Martin County, IN, Sullivan County, IN, Vigo County, IN

The radar

The Evansville,IN radar (KVWX), 98 km from the middle of the area, began a volume at 05:58 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.

Severe Thunderstorm Watch 420Jul 14, 2:05 AM CDT

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 5.9 hours before the alert went out and 131 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: 1504 J/kg
Mixed-layer CIN: -181 J/kg
Mixed-layer LCL: 1986 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 14.9

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
Jul 13, 7:22 PM CDT	Tornado Watch	SPC	Clark, Clay, Crawford, Cumberland, Effingham, Jasper and 2 more	7 hr
Jul 13, 8:31 PM CDT	Mesoscale Discussion	SPC	Edwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 11 more	59 min
Jul 13, 9:19 PM CDT	Severe Thunderstorm Watch	SPC	Edwards, Franklin, Gallatin, Hamilton, Hardin, Jefferson and 9 more	7 hr
Jul 13, 10:22 PM CDT	Mesoscale Discussion	SPC	Boone, Champaign, Cook, DeKalb, DuPage, Edgar and 11 more	53 min
Jul 14, 2:06 AM CDT	Severe Thunderstorm Watch	SPC	Clark, Coles, Crawford, Cumberland, Jasper, Lawrence and 2 more	5 hr
Jul 14, 4:35 AM CDT	Mesoscale Discussion	SPC	Lawrence	85 min
Jul 13, 11:47 PM CDT	Mesoscale Discussion	SPC	Bartholomew, Boone, Brown, Clark, Dearborn, Decatur and 24 more	58 min
Jul 14, 11:40 AM CDT	Severe Thunderstorm Watch	SPC	Dearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more	7 hr
Jul 14, 2:12 PM CDT	Mesoscale Discussion	SPC	Blackford, Dearborn, Fayette, Franklin, Jay, Ohio and 5 more	93 min
Jul 14, 3:37 PM CDT	Mesoscale Discussion	SPC	Blackford, Dearborn, Fayette, Franklin, Jay, Ohio and 5 more	83 min

Nearby

Mesoscale Discussions in Illinois, 2015 Mesoscale Discussions in Indiana, 2015 Every 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.