Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 1657

July 6, 20036 states

The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2003, 5:28 PM CDT for 6 states. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
Jul 6, 2003, 5:28 PM CDT (22:28 UTC)
Expired
Jul 6, 2003, 6:30 PM CDT
In force
62 min
Issued by
the Storm Prediction Center
All 166 counties

Clinton County, IA, Dubuque County, IA, Jackson County, IA, Scott County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, Champaign County, IL, Christian County, IL, Coles County, IL, Cook County, IL, DeKalb County, IL, DeWitt County, IL, Douglas County, IL, DuPage County, IL, Edgar County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Henry County, IL, Iroquois County, IL, Jo Daviess County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McHenry County, IL, McLean County, IL, Menard County, IL, Mercer County, IL, Moultrie County, IL, Ogle County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Rock Island County, IL, Sangamon County, IL, Shelby County, IL, Stark County, IL, Stephenson County, IL, Tazewell County, IL, Vermilion County, IL, Warren County, IL, Whiteside County, IL, Will County, IL, Winnebago 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, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Noble County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells 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, Clinton County, MI, Eaton County, MI, Genesee County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lenawee County, MI, Livingston County, MI, Monroe County, MI, Montcalm County, MI, Muskegon County, MI, Oakland County, MI, Ottawa County, MI, Saint Joseph County, MI, Shiawassee County, MI, Van Buren County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Auglaize County, OH, Darke County, OH, Defiance County, OH, Fulton County, OH, Hancock County, OH, Henry County, OH, Lucas County, OH, Mercer County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Sandusky County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH, Crawford County, WI, Dane County, WI, Dodge County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The Chicago radar (KLOT), 77 km from the middle of the area, began a volume at 22:27 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 12:00Z, 10.5 hours before the alert went out and 159 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 12:00Z on 2003-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1041 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 12:00Z on 2003-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 square meters per square second.1939Sfc1 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
1041 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
1114 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.4

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
Jul 5, 7:20 PM CDTMesoscale DiscussionSPCEdgar, Iroquois, Vermilion55 min
Jul 5, 7:51 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, Clark and 40 more54 min
Jul 5, 10:46 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, Clark and 33 more59 min
Jul 6, 5:17 AM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Stephenson, Whiteside118 min
Jul 6, 7:45 AM CDTMesoscale DiscussionSPCBoone, DeKalb, DuPage, Kane, Lake, McHenry2 hr
Jul 6, 9:48 AM CDTMesoscale DiscussionSPCAdams, Boone, Brown, Bureau, Carroll, Cass and 34 more117 min
Jul 6, 11:45 AM CDTTornado WatchSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 28 more6 hr
Jul 6, 12:36 PM CDTMesoscale DiscussionSPCCook, Kankakee114 min
Jul 6, 1:10 PM CDTSevere Thunderstorm WatchSPCChampaign, Christian, Clark, Coles, Cumberland, DeWitt and 14 more5 hr
Jul 6, 2:00 PM CDTMesoscale DiscussionSPCBoone, Brown, Cass, Champaign, Christian, Coles and 35 more2 hr
Jul 6, 6:00 PM CDTSevere Thunderstorm WatchSPCBoone, Cook, DeKalb, DuPage, Ford, Grundy and 9 more5 hr
Jul 6, 1:25 PM CDTSevere Thunderstorm WatchSPCDeKalb, Elkhart, Kosciusko, LaGrange, LaPorte, Marshall and 4 more5 hr
Jul 6, 5:45 PM CDTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Carroll, Cass, Clinton and 26 more5 hr
Jul 5, 7:20 PM CDTTornado WatchSPCFremont, Harrison, Mills, Monona, Page, Pottawattamie and 1 more6 hr
Jul 5, 8:04 PM CDTMesoscale DiscussionSPCClay, Dickinson, Emmet, Lyon, O'Brien, Osceola and 2 more86 min
Jul 5, 10:57 PM CDTMesoscale DiscussionSPCFremont, Harrison, Mills, Monona, Montgomery, Page and 1 more63 min
Jul 5, 11:50 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 36 more5 hr
Jul 6, 2:26 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Benton, Black Hawk, Boone and 49 more94 min
Jul 6, 4:33 AM CDTMesoscale DiscussionSPCAdair, Audubon, Carroll, Cass, Clarke, Crawford and 12 more87 min
Jul 5, 11:28 PM CDTMesoscale DiscussionSPCBelmont, Coshocton, Guernsey, Licking, Monroe, Morgan and 3 more2 hr
Jul 6, 6:54 PM CDTMesoscale DiscussionSPCAshland, Barron, Bayfield, Burnett, Douglas, Polk and 1 more4 hr

Nearby

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