Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 1650

July 6, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2003, 12:36 PM CDT for 4 states. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Jul 6, 2003, 12:36 PM CDT (17:36 UTC)
Expired: Jul 6, 2003, 2:30 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center

All 37 counties

Cook County, IL, Kankakee County, IL, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, White County, IN, Whitley County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Hillsdale County, MI, Jackson County, MI, Kalamazoo County, MI, Lenawee County, MI, Saint Joseph County, MI, Van Buren County, MI, Defiance County, OH, Fulton County, OH, Henry County, OH, Lucas County, OH, Williams County, OH

The radar

The Northern Indiana radar (KIWX), 39 km from the middle of the area, began a volume at 17:37 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

Detroit, MI (KDTX), launched 12:00Z, 5.6 hours before the alert went out and 248 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: 1597 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 205 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
Jul 5, 7:20 PM CDT	Mesoscale Discussion	SPC	Edgar, Iroquois, Vermilion	55 min
Jul 5, 7:51 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Cass, Champaign, Christian, Clark and 40 more	54 min
Jul 5, 10:46 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Cass, Champaign, Christian, Clark and 33 more	59 min
Jul 6, 5:17 AM CDT	Mesoscale Discussion	SPC	Carroll, Jo Daviess, Stephenson, Whiteside	118 min
Jul 6, 7:45 AM CDT	Mesoscale Discussion	SPC	Boone, DeKalb, DuPage, Kane, Lake, McHenry	2 hr
Jul 6, 9:48 AM CDT	Mesoscale Discussion	SPC	Adams, Boone, Brown, Bureau, Carroll, Cass and 34 more	117 min
Jul 6, 11:45 AM CDT	Tornado Watch	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 28 more	6 hr
Jul 6, 1:10 PM CDT	Severe Thunderstorm Watch	SPC	Champaign, Christian, Clark, Coles, Cumberland, DeWitt and 14 more	5 hr
Jul 6, 2:00 PM CDT	Mesoscale Discussion	SPC	Boone, Brown, Cass, Champaign, Christian, Coles and 35 more	2 hr
Jul 6, 5:28 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Champaign, Christian, Coles and 45 more	62 min
Jul 6, 6:00 PM CDT	Severe Thunderstorm Watch	SPC	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 9 more	5 hr
Jul 6, 1:25 PM CDT	Severe Thunderstorm Watch	SPC	DeKalb, Elkhart, Kosciusko, LaGrange, LaPorte, Marshall and 4 more	5 hr
Jul 6, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Blackford, Carroll, Cass, Clinton and 26 more	5 hr
Jul 5, 11:28 PM CDT	Mesoscale Discussion	SPC	Belmont, Coshocton, Guernsey, Licking, Monroe, Morgan and 3 more	2 hr

Nearby

Mesoscale Discussions in Indiana, 2003 Mesoscale Discussions in Michigan, 2003 Mesoscale Discussions in Ohio, 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.