Alert archive / Illinois / Mesoscale Discussions in 2006

Mesoscale Discussion 437

April 6, 20065 states

The Storm Prediction Center issued this mesoscale discussion at Apr 6, 2006, 11:19 AM CDT for 5 states. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
Apr 6, 2006, 11:19 AM CDT (16:19 UTC)
Expired
Apr 6, 2006, 12:15 PM CDT
In force
56 min
Issued by
the Storm Prediction Center
All 141 counties

Cedar County, IA, Davis County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Mahaska County, IA, Muscatine County, IA, Poweshiek County, IA, Scott County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Adams County, IL, Alexander County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Fulton County, IL, Gallatin County, IL, Greene County, IL, Hamilton County, IL, Hancock County, IL, Hardin County, IL, Henderson County, IL, Henry County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Johnson County, IL, Knox County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Mason County, IL, Massac County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Mercer County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Peoria County, IL, Perry County, IL, Piatt County, IL, Pike County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Rock Island County, IL, Saint Clair County, IL, Saline County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Stark County, IL, Tazewell County, IL, Union County, IL, Wabash County, IL, Warren County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Woodford County, IL, Gibson County, IN, Knox County, IN, Pike County, IN, Posey County, IN, Sullivan County, IN, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Caldwell County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Cape Girardeau County, MO, City of Saint Louis, MO, Clark County, MO, Franklin County, MO, Iron County, MO, Jefferson County, MO, Lewis County, MO, Lincoln County, MO, Madison County, MO, Marion County, MO, Mississippi County, MO, Montgomery County, MO, Perry County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Scotland County, MO, Scott County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 96 km from the middle of the area, began a volume at 16:22 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, 4.3 hours before the alert went out and 152 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 2006-04-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 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 2006-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
453 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
78 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.

IssuedProductOfficeCountiesLasted
Apr 5, 10:36 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Hancock, Pike84 min
Apr 5, 11:09 PM CDTSevere Thunderstorm WatchSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 36 more4 hr
Apr 6, 3:24 PM CDTMesoscale DiscussionSPCAudubon, Carroll, Crawford, Harrison, Ida, Monona and 3 more2 hr
Apr 6, 6:01 AM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Cass, Clay, Clinton and 4 more119 min
Apr 6, 11:03 AM CDTMesoscale DiscussionSPCBarry, Jasper, Lawrence, McDonald, Newton, Stone and 1 more117 min
Apr 6, 12:12 PM CDTSevere Thunderstorm WatchSPCBarry, Christian, Dent, Douglas, Greene, Howell and 9 more4 hr
Apr 6, 3:29 PM CDTMesoscale DiscussionSPCDouglas, Howell, Ozark, Texas, Wright91 min
Apr 6, 4:21 PM CDTMesoscale DiscussionSPCBarry, McDonald, Taney84 min
Apr 6, 4:53 PM CDTMesoscale DiscussionSPCAndrew, Barry, Barton, Bates, Benton, Buchanan and 51 more97 min
Apr 6, 5:54 PM CDTTornado WatchSPCBarry, Barton, Bates, Benton, Camden, Cass and 33 more7 hr

Nearby

Mesoscale Discussions in Illinois, 2006Mesoscale Discussions in Missouri, 2006Mesoscale Discussions in Iowa, 2006Every mesoscale discussion in 2006

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.