Alert archive / Illinois / Mesoscale Discussions in 2003

Mesoscale Discussion 2332

August 31, 200314 counties in Illinois; 6 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Aug 31, 2003, 9:44 PM CDT for 14 counties in Illinois; 6 counties in Indiana. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 31, 2003, 9:44 PM CDT (02:44 UTC)
Expired: Aug 31, 2003, 11:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Bond County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Crawford County, IL, Cumberland County, IL, Effingham County, IL, Fayette County, IL, Jasper County, IL, Lawrence County, IL, Marion County, IL, Montgomery County, IL, Richland County, IL, Shelby County, IL, Daviess County, IN, Greene County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Sullivan County, IN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 2.7 hours before the alert went out and 342 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: 977 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 1330 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 53 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
Aug 31, 7:11 PM CDT	Mesoscale Discussion	SPC	Christian, Clark, Clay, Coles, Crawford, Cumberland and 13 more	94 min
Sep 1, 1:43 PM CDT	Mesoscale Discussion	SPC	Crawford, Edwards, Franklin, Gallatin, Hamilton, Hardin and 7 more	2 hr
Sep 1, 2:05 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Clay, Crawford, Edwards, Effingham, Hamilton and 6 more	6 hr
Sep 1, 3:38 PM CDT	Mesoscale Discussion	SPC	Crawford, Edwards, Jasper, Lawrence, Richland, Saline and 3 more	97 min

Nearby

Mesoscale Discussions in Illinois, 2003 Mesoscale Discussions in Indiana, 2003 Every mesoscale discussion in 2003

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.