Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 1631

July 5, 20034 counties in Illinois; 19 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2003, 4:34 PM CDT for 4 counties in Illinois; 19 counties in Indiana. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: Jul 5, 2003, 4:34 PM CDT (21:34 UTC)
Expired: Jul 5, 2003, 5:30 PM CDT
In force: 56 min
Issued by: the Storm Prediction Center

All 23 counties

Champaign County, IL, Ford County, IL, Iroquois County, IL, Vermilion County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Fountain County, IN, Hamilton County, IN, Howard County, IN, Jasper County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Parke County, IN, Pulaski County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Warren County, IN, White County, IN

The radar

The Indianapolis radar (KIND), 104 km from the middle of the area, began a volume at 21:34 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.6 hours before the alert went out and 132 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: 2306 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 771 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -54 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 4, 8:58 PM CDT	Mesoscale Discussion	SPC	DuPage, Grundy, Iroquois, Kane, Kankakee, Kendall and 1 more	62 min
Jul 4, 10:09 PM CDT	Mesoscale Discussion	SPC	Brown, Cass, Champaign, DeWitt, Douglas, Ford and 20 more	2 hr
Jul 4, 10:45 PM CDT	Mesoscale Discussion	SPC	Jo Daviess, Rock Island	90 min
Jul 4, 11:25 PM CDT	Severe Thunderstorm Watch	SPC	Carroll, Henderson, Henry, Jo Daviess, Knox, Mercer and 6 more	7 hr
Jul 5, 2:31 AM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 27 more	89 min
Jul 5, 3:40 AM CDT	Severe Thunderstorm Watch	SPC	Boone, Bureau, Cook, DeKalb, DuPage, Grundy and 11 more	4 hr
Jul 5, 5:43 AM CDT	Mesoscale Discussion	SPC	Cook, Kankakee, Lake, Will	92 min
Jul 5, 12:55 PM CDT	Mesoscale Discussion	SPC	Champaign, Christian, Clark, Coles, Crawford, Cumberland and 14 more	3 hr
Jul 5, 5:18 PM CDT	Mesoscale Discussion	SPC	Cass, DeWitt, Fulton, Hancock, Henderson, Henry and 16 more	57 min
Jul 5, 5:55 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Cass, Champaign, Christian, Clark and 36 more	6 hr
Jul 5, 6:00 AM CDT	Severe Thunderstorm Watch	SPC	Elkhart, LaGrange, LaPorte, Porter, Saint Joseph, Steuben	3 hr
Jul 5, 7:12 AM CDT	Mesoscale Discussion	SPC	Adams, Allen, DeKalb, Elkhart, Fulton, Huntington and 10 more	93 min
Jul 5, 4:55 PM CDT	Severe Thunderstorm Watch	SPC	Bartholomew, Benton, Boone, Brown, Carroll, Clay and 35 more	4 hr

Nearby

Mesoscale Discussions in Indiana, 2003 Mesoscale Discussions in Illinois, 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; radar from the NEXRAD Level II archive.