Alert archive / Indiana / Mesoscale Discussions in 2004

Mesoscale Discussion 574

May 7, 200418 counties in Illinois; 36 counties in Indiana; Mercer County, Ohio

The Storm Prediction Center issued this mesoscale discussion at May 7, 2004, 6:38 AM CDT for 18 counties in Illinois; 36 counties in Indiana; Mercer County, Ohio. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
May 7, 2004, 6:38 AM CDT (11:38 UTC)
Expired
May 7, 2004, 8:15 AM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 55 counties

Bureau County, IL, Champaign County, IL, DeWitt County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kankakee County, IL, LaSalle County, IL, Livingston County, IL, Marshall County, IL, McLean County, IL, Peoria County, IL, Putnam County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Will County, IL, Woodford County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Delaware County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Kosciusko County, IN, Lake County, IN, Madison County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Porter County, IN, Pulaski County, IN, Randolph County, IN, Starke County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN, Mercer County, OH

The radar

The Chicago radar (KLOT), 99 km from the middle of the area, began a volume at 11:37 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

Lincoln, IL (KILX), launched 00:00Z, 11.6 hours before the alert went out and 117 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2004-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1869 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2004-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1869 J/kg
Mixed-layer CIN
-151 J/kg
Mixed-layer LCL
1906 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

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.

IssuedProductOfficeCountiesLasted
May 6, 11:53 PM CDTMesoscale DiscussionSPCBureau, Carroll, DeKalb, Henry, Jo Daviess, Knox and 10 more97 min
May 7, 4:24 AM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 22 more96 min
May 7, 5:00 AM CDTSevere Thunderstorm WatchSPCBureau, Ford, Grundy, Iroquois, Kankakee, Kendall and 10 more4 hr
May 7, 11:44 AM CDTMesoscale DiscussionSPCBureau, Carroll, DeKalb, DuPage, Grundy, Henry and 9 more2 hr
May 7, 4:33 PM CDTMesoscale DiscussionSPCBoone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 9 more87 min
May 7, 5:25 PM CDTSevere Thunderstorm WatchSPCBoone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 6 more6 hr
May 6, 8:37 PM CDTMesoscale DiscussionSPCAllen, DeKalb, Elkhart, Kosciusko, LaGrange, Noble and 2 more83 min
May 6, 9:10 PM CDTSevere Thunderstorm WatchSPCAdams, Allen, Benton, Cass, DeKalb, Elkhart and 20 more5 hr
May 7, 8:30 AM CDTMesoscale DiscussionSPCAdams, Allen, Blackford, Carroll, Cass, Clinton and 17 more90 min
May 7, 8:30 AM CDTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 26 more6 hr
May 6, 10:05 PM CDTMesoscale DiscussionSPCAshland, Ashtabula, Cuyahoga, Geauga, Lake, Lorain and 7 more85 min
May 6, 10:20 PM CDTSevere Thunderstorm WatchSPCAshland, Ashtabula, Carroll, Columbiana, Crawford, Cuyahoga and 27 more5 hr
May 7, 2:13 AM CDTMesoscale DiscussionSPCAshtabula, Carroll, Columbiana, Cuyahoga, Erie, Geauga and 15 more62 min
May 7, 9:29 AM CDTMesoscale DiscussionSPCAthens, Belmont, Carroll, Coshocton, Guernsey, Harrison and 9 more91 min
May 7, 10:00 AM CDTSevere Thunderstorm WatchSPCAthens, Belmont, Coshocton, Gallia, Guernsey, Harrison and 10 more6 hr
May 7, 11:49 AM CDTMesoscale DiscussionSPCAthens, Champaign, Clark, Clinton, Delaware, Fairfield and 24 more86 min
May 7, 12:49 PM CDTMesoscale DiscussionSPCAthens, Belmont, Gallia, Guernsey, Harrison, Hocking and 7 more86 min

Nearby

Mesoscale Discussions in Indiana, 2004Mesoscale Discussions in Illinois, 2004Mesoscale Discussions in Ohio, 2004Every 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.