Alert archive / Illinois / Mesoscale Discussions in 2006
Mesoscale Discussion 227
The Storm Prediction Center issued this mesoscale discussion at Mar 11, 2006, 1:29 AM CST for 6 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 11, 2006, 1:29 AM CST (07:29 UTC)
- Expired
- Mar 11, 2006, 3:30 AM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 74 counties
Clay County, AR, Craighead County, AR, Greene County, AR, Lawrence County, AR, Mississippi County, AR, Randolph County, AR, Alexander County, IL, Bond County, IL, Clay County, IL, Clinton County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Madison County, IL, Marion County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Posey County, IN, Ballard County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Union County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, City of Saint Louis, MO, Dunklin County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Crockett County, TN, Dyer County, TN, Gibson County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Weakley County, TN
The radar
The Paducah radar (KPAH), 95 km from the middle of the area, began a volume at 07:31 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
Little Rock, AR (KLZK), launched 00:00Z, 7.5 hours before the alert went out and 275 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2466 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 340 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 10, 8:19 PM CST | Severe Thunderstorm Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 18 hr |
| Mar 10, 10:12 PM CST | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Conway, Crawford and 17 more | 93 min |
| Mar 10, 10:59 PM CST | Severe Thunderstorm Watch | SPC | Baxter, Boone, Cleburne, Conway, Faulkner, Fulton and 20 more | 6 hr |
| Mar 11, 1:51 AM CST | Severe Thunderstorm Watch | SPC | Clay, Craighead, Greene, Lawrence, Mississippi, Randolph | 6 hr |
| Mar 11, 4:25 AM CST | Mesoscale Discussion | SPC | Baxter, Boone, Carroll, Clark, Cleburne, Conway and 26 more | 65 min |
| Mar 11, 5:53 AM CST | Mesoscale Discussion | SPC | Baxter, Clay, Craighead, Fulton, Greene, Independence and 6 more | 97 min |
| Mar 11, 9:36 AM CST | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Clark, Clay and 52 more | 54 min |
| Mar 11, 11:59 AM CST | Mesoscale Discussion | SPC | Benton, Carroll, Washington | 2 hr |
| Mar 11, 12:47 PM CST | Tornado Watch | SPC | Benton, Boone, Carroll, Crawford, Franklin, Johnson and 8 more | 7 hr |
| Mar 11, 3:30 PM CST | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Crawford, Franklin, Madison and 4 more | 90 min |
| Mar 11, 3:34 AM CST | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Champaign and 38 more | 86 min |
| Mar 11, 1:25 PM CST | Mesoscale Discussion | SPC | Adams, Brown, Bureau, Calhoun, Cass, Christian and 37 more | 95 min |
| Mar 11, 2:22 PM CST | Tornado Watch | SPC | Adams, Bond, Brown, Bureau, Calhoun, Cass and 53 more | 8 hr |
| Mar 11, 3:52 PM CST | Mesoscale Discussion | SPC | Adams, Bond, Brown, Bureau, Calhoun, Cass and 41 more | 83 min |
| Mar 11, 5:46 PM CST | Mesoscale Discussion | SPC | Boone, Carroll, DeKalb, Kane, McHenry, Ogle and 2 more | 89 min |
| Mar 11, 3:08 AM CST | Mesoscale Discussion | SPC | Perry, Spencer, Vanderburgh, Warrick | 97 min |
| Mar 11, 3:30 AM CST | Severe Thunderstorm Watch | SPC | Crawford, Dubois, Gibson, Harrison, Orange, Perry and 6 more | 6 hr |
Nearby
Mesoscale Discussions in Illinois, 2006Mesoscale Discussions in Missouri, 2006Mesoscale Discussions in Kentucky, 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.