Alert archive / Indiana / Mesoscale Discussions in 2004

Mesoscale Discussion 1485

July 3, 20047 counties in Illinois; 52 counties in Indiana; Berrien County, Michigan

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2004, 2:44 PM CDT for 7 counties in Illinois; 52 counties in Indiana; Berrien County, Michigan. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 3, 2004, 2:44 PM CDT (19:44 UTC)
Expired: Jul 3, 2004, 4:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 60 counties

Cook County, IL, DuPage County, IL, Grundy County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Will County, IL, Bartholomew County, IN, Benton County, IN, Boone County, IN, Brown County, IN, Carroll County, IN, Cass County, IN, Clark County, IN, Clinton County, IN, Decatur County, IN, Floyd County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Harrison County, IN, Hendricks County, IN, Howard County, IN, Jackson County, IN, Jasper County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Lake County, IN, LaPorte County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Martin County, IN, Miami County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Newton County, IN, Orange County, IN, Owen County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Putnam County, IN, Rush County, IN, Saint Joseph County, IN, Scott County, IN, Shelby County, IN, Starke County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Warren County, IN, Washington County, IN, White County, IN, Berrien County, MI

The radar

The Indianapolis radar (KIND), 116 km from the middle of the area, began a volume at 19:48 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, 7.7 hours before the alert went out and 135 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: 201 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 716 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 126 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 3, 11:38 AM CDT	Mesoscale Discussion	SPC	Bureau, Champaign, Clark, Coles, Cook, Crawford and 38 more	2 hr
Jul 3, 12:45 PM CDT	Tornado Watch	SPC	Champaign, Clark, Coles, Crawford, Douglas, Edgar and 8 more	6 hr
Jul 3, 6:16 PM CDT	Mesoscale Discussion	SPC	Champaign, Clark, Crawford, Edgar, Ford, Iroquois and 4 more	119 min

Nearby

Mesoscale Discussions in Indiana, 2004 Mesoscale Discussions in Illinois, 2004 Mesoscale Discussions in Michigan, 2004 Every mesoscale discussion in 2004

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.