Alert archive / Illinois / Mesoscale Discussions in 2006

Mesoscale Discussion 243

March 11, 200640 counties in Illinois; 6 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Mar 11, 2006, 6:39 PM CST for 40 counties in Illinois; 6 counties in Missouri. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Mar 11, 2006, 6:39 PM CST (00:39 UTC)
Expired
Mar 11, 2006, 7:45 PM CST
In force
66 min
Issued by
the Storm Prediction Center
All 46 counties

Bond County, IL, Calhoun County, IL, Champaign County, IL, Christian County, IL, Clinton County, IL, DeWitt County, IL, Douglas County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Greene County, IL, Grundy County, IL, Iroquois County, IL, Jersey County, IL, Kankakee County, IL, LaSalle County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Randolph County, IL, Saint Clair County, IL, Sangamon County, IL, Shelby County, IL, Stark County, IL, Tazewell County, IL, Washington County, IL, Woodford County, IL, City of Saint Louis, MO, Franklin County, MO, Jefferson County, MO, Lincoln County, MO, Saint Charles County, MO, Saint Louis County, MO

The radar

The Lincoln radar (KILX), 60 km from the middle of the area, began a volume at 00:40 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, 0.7 hours before the alert went out and 108 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 2006-03-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 789 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 2006-03-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 square meters per square second.1939587897Sfc1 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
789 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
708 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.5
Supercell composite
1.4

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
Mar 11, 6:49 PM CSTTornado WatchSPCBond, Clinton, Fayette, Madison, Marion, Monroe and 3 more7 hr
Mar 11, 8:06 PM CSTMesoscale DiscussionSPCBond, Champaign, Christian, Clark, Clay, Coles and 21 more84 min
Mar 11, 9:11 PM CSTMesoscale DiscussionSPCClark, Clay, Coles, Crawford, Cumberland, Edgar and 18 more94 min
Mar 11, 9:55 PM CSTTornado WatchSPCFranklin, Hamilton, Jackson, Jefferson, Perry, Wayne and 1 more3 hr
Mar 11, 10:50 PM CSTMesoscale DiscussionSPCWabash55 min
Mar 11, 11:10 PM CSTTornado WatchSPCEdwards, Wabash, White2 hr
Mar 11, 11:13 PM CSTMesoscale DiscussionSPCFranklin, Jackson, Jefferson, Monroe, Perry, Randolph and 4 more92 min
Mar 12, 1:07 AM CSTTornado WatchSPCAlexander, Clay, Clinton, Edwards, Franklin, Gallatin and 22 more7 hr
Mar 12, 3:39 AM CSTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 16 more96 min
Mar 12, 10:02 AM CSTSevere Thunderstorm WatchSPCAdams, Brown, Calhoun, Pike110 min
Mar 12, 11:17 AM CSTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Champaign, Christian and 28 more88 min
Mar 12, 11:49 AM CSTTornado WatchSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 30 more10 hr
Mar 12, 1:02 PM CSTMesoscale DiscussionSPCEdwards, Gallatin, Hamilton, Hardin, Johnson, Pope and 5 more88 min
Mar 12, 2:33 PM CSTMesoscale DiscussionSPCBureau, Carroll, DeKalb, Grundy, Henderson, Henry and 13 more87 min
Mar 12, 3:02 PM CSTMesoscale DiscussionSPCAdams, Brown, Calhoun, Greene, Jersey, Macoupin and 6 more88 min
Mar 12, 4:22 PM CSTMesoscale DiscussionSPCBureau, Carroll, DeKalb, DuPage, Grundy, Henderson and 18 more53 min
Mar 12, 4:49 PM CSTTornado WatchSPCBureau, Ford, Grundy, Henderson, Henry, Iroquois and 11 more5 hr
Mar 12, 5:06 PM CSTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 26 more84 min
Mar 11, 6:11 PM CSTMesoscale DiscussionSPCBarry, Bollinger, Butler, Carter, Christian, Dent and 19 more2 hr
Mar 12, 7:09 AM CSTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Clay, Clinton, DeKalb and 6 more96 min
Mar 12, 7:47 AM CSTSevere Thunderstorm WatchSPCAndrew, Atchison, Bates, Buchanan, Cass, Clay and 8 more4 hr
Mar 12, 11:29 AM CSTMesoscale DiscussionSPCMcDonald, Newton2 hr
Mar 12, 12:46 PM CSTTornado WatchSPCBarry, Christian, Douglas, Howell, McDonald, Newton and 4 more9 hr
Mar 12, 1:29 PM CSTMesoscale DiscussionSPCAudrain, Barton, Bates, Benton, Boone, Buchanan and 44 more91 min
Mar 12, 3:38 PM CSTMesoscale DiscussionSPCMcDonald2 hr

Nearby

Mesoscale Discussions in Illinois, 2006Mesoscale Discussions in Missouri, 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.