Alert archive / Illinois / Mesoscale Discussions in 2014
Mesoscale Discussion 458
The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2014, 3:38 PM CDT for 48 counties in Illinois; 24 counties in Iowa; 7 counties in Missouri. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 28, 2014, 3:38 PM CDT (20:38 UTC)
- Expired
- Apr 28, 2014, 5:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 79 counties
Carroll County, IA, Cedar County, IA, Dallas County, IA, Davis County, IA, Des Moines County, IA, Greene County, IA, Guthrie County, IA, Henry County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Mahaska County, IA, Marion County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Scott County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Adams County, IL, Bond County, IL, Brown County, IL, Bureau County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Clinton County, IL, DeWitt County, IL, Fayette County, IL, Ford County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jersey County, IL, Knox County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marshall County, IL, Mason 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, Piatt County, IL, Pike County, IL, Putnam County, IL, Rock Island County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Woodford County, IL, City of Saint Louis, MO, Clark County, MO, Jefferson County, MO, Lincoln County, MO, Pike County, MO, Saint Charles County, MO, Saint Louis County, MO
The radar
The Quad Cities radar (KDVN), 133 km from the middle of the area, began a volume at 20:39 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, 8.6 hours before the alert went out and 137 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
- 497 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 276 m²/s²
- 0-3 km storm-relative helicity
- 295 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 |
|---|---|---|---|---|
| Apr 27, 7:53 PM CDT | Tornado Watch | SPC | Alexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more | 6 hr |
| Apr 27, 11:41 PM CDT | Mesoscale Discussion | SPC | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more | 94 min |
| Apr 28, 1:43 AM CDT | Mesoscale Discussion | SPC | Bond, Clinton, Franklin, Jackson, Jefferson, Madison and 8 more | 92 min |
| Apr 28, 12:54 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Fulton, Greene and 16 more | 2 hr |
| Apr 28, 1:11 PM CDT | Tornado Watch | SPC | Adams, Bond, Brown, Calhoun, Cass, Christian and 39 more | 7 hr |
| Apr 28, 3:13 PM CDT | Mesoscale Discussion | SPC | Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 9 more | 2 hr |
| Apr 28, 6:10 PM CDT | Mesoscale Discussion | SPC | Bond, Bureau, Christian, Clay, Clinton, Coles and 51 more | 95 min |
| Apr 27, 7:29 PM CDT | Mesoscale Discussion | SPC | Butler, Dunklin, Mississippi, New Madrid, Pemiscot, Ripley and 2 more | 91 min |
| Apr 27, 8:40 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Camden, Carroll and 35 more | 65 min |
| Apr 27, 8:43 PM CDT | Mesoscale Discussion | SPC | Butler, Dunklin, Pemiscot | 62 min |
| Apr 27, 11:21 PM CDT | Mesoscale Discussion | SPC | Barry, Camden, Christian, Dallas, Douglas, Greene and 13 more | 84 min |
| Apr 28, 1:43 AM CDT | Tornado Watch | SPC | Dunklin, Pemiscot | 8 hr |
Nearby
Mesoscale Discussions in Illinois, 2014Mesoscale Discussions in Iowa, 2014Mesoscale Discussions in Missouri, 2014Every mesoscale discussion in 2014
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.