Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 2075

August 3, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Aug 3, 2003, 6:15 PM CDT for 4 states. It was in force for 105 min.

The area

The outline as issued.

The facts

Issued: Aug 3, 2003, 6:15 PM CDT (23:15 UTC)
Expired: Aug 3, 2003, 8:00 PM CDT
In force: 105 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm potential

All 66 counties

Bureau County, IL, Champaign County, IL, Ford County, IL, Grundy County, IL, Henry County, IL, Iroquois County, IL, Kankakee County, IL, LaSalle County, IL, Livingston County, IL, Marshall County, IL, McLean County, IL, Putnam County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Woodford County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, Marshall County, IN, Miami County, IN, Newton County, IN, Noble County, IN, Pulaski County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN, Barry County, MI, Branch County, MI, Calhoun County, MI, Clinton County, MI, Eaton County, MI, Gratiot County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Mecosta County, MI, Montcalm County, MI, Saint Joseph County, MI, Shiawassee County, MI, Defiance County, OH, Paulding County, OH, Williams County, OH

The radar

The Northern Indiana radar (KIWX), 94 km from the middle of the area, began a volume at 23:18 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, 11.3 hours before the alert went out and 245 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: 572 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1046 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 59 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 2, 9:11 PM CDT	Mesoscale Discussion	SPC	Bond, Clay, Clinton, Coles, Cumberland, Effingham and 9 more	94 min
Aug 3, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	Alexander, Bond, Clay, Clinton, Crawford, Edwards and 28 more	6 hr
Aug 3, 3:25 PM CDT	Mesoscale Discussion	SPC	Alexander, Hardin, Jackson, Johnson, Massac, Pope and 3 more	2 hr

Nearby

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