Alert archive / Iowa / Mesoscale Discussions in 2014
Mesoscale Discussion 453
The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2014, 12:54 PM CDT for 5 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 28, 2014, 12:54 PM CDT (17:54 UTC)
- Expired
- Apr 28, 2014, 3:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 90 counties
Adair County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Calhoun County, IA, Carroll County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Des Moines County, IA, Greene County, IA, Guthrie County, IA, Henry County, IA, Ida County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monona County, IA, Monroe County, IA, Plymouth County, IA, Polk County, IA, Poweshiek County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Woodbury County, IA, Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Henderson County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Monroe County, IL, Morgan County, IL, Pike County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Warren County, IL, Audrain County, MO, Callaway County, MO, City of Saint Louis, MO, Clark County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Warren County, MO, Washington County, MO, Dakota County, NE, Dixon County, NE, Clay County, SD, Union County, SD
The radar
The Des Moines radar (KDMX), 172 km from the middle of the area, began a volume at 17:53 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
Davenport, (KDVN), launched 12:00Z, 5.9 hours before the alert went out and 226 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, 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, 3:38 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Bureau, Calhoun, Cass and 42 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 Iowa, 2014Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Illinois, 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.