Alert archive / Illinois / Mesoscale Discussions in 2011
Mesoscale Discussion 128
The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2011, 5:20 PM CST for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 24, 2011, 5:20 PM CST (23:20 UTC)
- Expired
- Feb 24, 2011, 11:15 PM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 88 counties
Appanoose County, IA, Davis County, IA, Des Moines County, IA, Henry County, IA, Jefferson County, IA, Lee County, IA, Louisa County, IA, Monroe County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Adams County, IL, Brown County, IL, Bureau County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, DeWitt County, IL, Douglas County, IL, Ford County, IL, Fulton County, IL, Greene County, IL, Grundy County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Iroquois County, IL, Kankakee County, IL, Knox County, IL, LaSalle County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Mercer County, IL, Morgan County, IL, Moultrie County, IL, Peoria County, IL, Piatt County, IL, Pike County, IL, Putnam County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Warren County, IL, Woodford County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Fountain County, IN, Howard County, IN, Jasper County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Pulaski County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Warren County, IN, White County, IN, Adair County, MO, Audrain County, MO, Chariton County, MO, Clark County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Macon County, MO, Marion County, MO, Monroe County, MO, Pike County, MO, Putnam County, MO, Ralls County, MO, Randolph County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO
The radar
The Lincoln radar (KILX), 27 km from the middle of the area, began a volume at 23:22 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
Davenport, (KDVN), launched 12:00Z, 11.3 hours before the alert went out and 165 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
- 873 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- -165 m²/s²
- 0-3 km storm-relative helicity
- -57 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 |
|---|---|---|---|---|
| Feb 24, 11:13 AM CST | Mesoscale Discussion | SPC | Adams, Appanoose, Decatur, Fremont, Page, Ringgold and 2 more | 6 hr |
| Feb 23, 8:43 PM CST | Mesoscale Discussion | SPC | Barton, Cedar, Dade, Jasper, Newton, Vernon | 62 min |
| Feb 24, 2:34 PM CST | Tornado Watch | SPC | Dunklin, Pemiscot | 7 hr |
| Feb 24, 5:26 PM CST | Mesoscale Discussion | SPC | Dunklin, Mississippi, New Madrid, Pemiscot | 94 min |
| Feb 24, 5:54 PM CST | Tornado Watch | SPC | Mississippi, New Madrid | 4 hr |
Nearby
Mesoscale Discussions in Illinois, 2011Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Indiana, 2011Every mesoscale discussion in 2011
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.