Alert archive / Indiana / Mesoscale Discussions in 2004

Mesoscale Discussion 1545

July 6, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2004, 2:53 PM CDT for 4 states. It was in force for 37 min.

The area

The outline as issued.

The facts

Issued
Jul 6, 2004, 2:53 PM CDT (19:53 UTC)
Expired
Jul 6, 2004, 3:30 PM CDT
In force
37 min
Issued by
the Storm Prediction Center
All 91 counties

Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Cook County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, DuPage County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Jasper County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lawrence County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, McLean County, IL, Montgomery County, IL, Moultrie County, IL, Piatt County, IL, Richland County, IL, Sangamon County, IL, Shelby County, IL, Vermilion County, IL, Will County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Daviess County, IN, Elkhart County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hendricks County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Knox County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte 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, Noble County, IN, Owen County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Putnam County, IN, Saint Joseph County, IN, Starke County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, White County, IN, Whitley County, IN, Berrien County, MI, Branch County, MI, Cass County, MI, Saint Joseph County, MI, City of Saint Louis, MO

The radar

The Lincoln radar (KILX), 105 km from the middle of the area, began a volume at 19:52 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, 7.9 hours before the alert went out and 45 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 2004-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 467 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 2004-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 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
467 J/kg
Mixed-layer CIN
-139 J/kg
Mixed-layer LCL
956 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

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.

IssuedProductOfficeCountiesLasted
Jul 5, 7:05 PM CDTMesoscale DiscussionSPCBond, Calhoun, Greene, Jersey, Macoupin, Madison and 2 more55 min
Jul 5, 9:10 PM CDTSevere Thunderstorm WatchSPCBond, Christian, Clark, Clay, Clinton, Coles and 18 more4 hr
Jul 5, 9:29 PM CDTMesoscale DiscussionSPCBureau, Carroll, Henderson, Henry, Jo Daviess, Lee and 8 more61 min
Jul 5, 11:14 PM CDTMesoscale DiscussionSPCChampaign, DeWitt, Douglas, Edgar, Ford, Iroquois and 13 more91 min
Jul 5, 11:44 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clark, Clay, Clinton, Coles and 26 more91 min
Jul 6, 6:50 AM CDTSevere Thunderstorm WatchSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 19 more4 hr
Jul 6, 9:00 AM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Champaign, Christian and 28 more60 min
Jul 6, 11:01 AM CDTMesoscale DiscussionSPCAlexander, Bond, Clay, Clinton, Crawford, Cumberland and 29 more59 min
Jul 6, 12:10 PM CDTSevere Thunderstorm WatchSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 17 more6 hr
Jul 6, 2:34 PM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 17 more56 min
Jul 6, 3:25 PM CDTSevere Thunderstorm WatchSPCBond, Champaign, Christian, Clark, Clay, Coles and 30 more8 hr
Jul 6, 5:37 PM CDTMesoscale DiscussionSPCAlexander, Johnson, Pulaski, Union53 min
Jul 6, 1:45 AM CDTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 31 more5 hr
Jul 6, 1:35 PM CDTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Harrison, Orange and 2 more25 min
Jul 6, 1:50 PM CDTSevere Thunderstorm WatchSPCClark, Crawford, Floyd, Harrison, Orange, Perry and 2 more6 hr
Jul 6, 4:34 PM CDTMesoscale DiscussionSPCAllegan, Arenac, Barry, Bay, Branch, Calhoun and 37 more86 min
Jul 6, 5:15 PM CDTTornado WatchSPCBarry, Bay, Branch, Calhoun, Cass, Clinton and 23 more7 hr
Jul 5, 10:00 PM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Buchanan, Holt, Nodaway, Worth6 hr
Jul 6, 1:16 AM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Holt, Nodaway, Worth119 min
Jul 6, 2:45 AM CDTMesoscale DiscussionSPCAudrain, Bates, Benton, Boone, Buchanan, Caldwell and 33 more2 hr
Jul 6, 3:10 AM CDTSevere Thunderstorm WatchSPCBarton, Bates, Benton, Boone, Buchanan, Caldwell and 30 more5 hr
Jul 6, 3:50 AM CDTSevere Thunderstorm WatchSPCBarry, McDonald, Stone5 hr
Jul 6, 5:18 AM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Boone, Camden and 33 more117 min

Nearby

Mesoscale Discussions in Indiana, 2004Mesoscale Discussions in Illinois, 2004Mesoscale Discussions in Michigan, 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.