Alert archive / Indiana / Mesoscale Discussions in 2004

Mesoscale Discussion 1483

July 3, 200444 counties in Illinois; 60 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2004, 11:38 AM CDT for 44 counties in Illinois; 60 counties in Indiana. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 3, 2004, 11:38 AM CDT (16:38 UTC)
Expired: Jul 3, 2004, 1:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 104 counties

Bureau County, IL, Champaign County, IL, Clark County, IL, Coles County, IL, Cook County, IL, Crawford County, IL, Cumberland County, IL, DeKalb County, IL, DeWitt County, IL, Douglas County, IL, DuPage County, IL, Edgar County, IL, Ford County, IL, Grundy County, IL, Henry County, IL, Iroquois County, IL, Jasper County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lawrence County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Moultrie County, IL, Ogle County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Richland County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Wabash County, IL, Whiteside County, IL, Will County, IL, Woodford County, IL, Bartholomew County, IN, Benton County, IN, Boone County, IN, Brown County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Daviess County, IN, Decatur County, IN, Dubois County, IN, Fayette County, IN, Fountain County, IN, Fulton County, IN, Gibson County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Jackson County, IN, Jasper County, IN, Jennings County, IN, Johnson County, IN, Knox 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, Pike County, IN, Porter County, IN, Pulaski County, IN, Putnam County, IN, Rush County, IN, Shelby County, IN, Spencer County, IN, Starke County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vanderburgh County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, Warrick County, IN, Washington County, IN, White County, IN

The radar

The Lincoln radar (KILX), 108 km from the middle of the area, began a volume at 16:40 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.

Tornado Watch 540Jul 3, 12:45 PM CDT

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 4.6 hours before the alert went out and 46 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, 12:45 PM CDT	Tornado Watch	SPC	Champaign, Clark, Coles, Crawford, Douglas, Edgar and 8 more	6 hr
Jul 3, 2:44 PM CDT	Mesoscale Discussion	SPC	Cook, DuPage, Grundy, Kane, Kankakee, Kendall and 1 more	2 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 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.