Alert archive / Missouri / Mesoscale Discussions in 2011
Mesoscale Discussion 1893
The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2011, 8:27 PM CDT for 6 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2011, 8:27 PM CDT (01:27 UTC)
- Expired
- Aug 7, 2011, 10:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 72 counties
Baxter County, AR, Boone County, AR, Carroll County, AR, Clay County, AR, Craighead County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Lawrence County, AR, Marion County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, Stone County, AR, Alexander County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Pulaski County, IL, Randolph County, IL, Union County, IL, Ballard County, KY, Carlisle County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, McCracken County, KY, Barry County, MO, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Christian County, MO, Douglas County, MO, Dunklin County, MO, Howell County, MO, Iron County, MO, Jasper County, MO, Lawrence County, MO, Madison County, MO, McDonald County, MO, Mississippi County, MO, New Madrid County, MO, Newton County, MO, Oregon County, MO, Ozark County, MO, Pemiscot County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Stone County, MO, Taney County, MO, Washington County, MO, Wayne County, MO, Ottawa County, OK, Crockett County, TN, Dyer County, TN, Gibson County, TN, Haywood County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, Obion County, TN, Tipton County, TN, Weakley County, TN
The radar
The Springfield radar (KSGF), 194 km from the middle of the area, began a volume at 01:29 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
Springfield, MO (KSGF), launched 00:00Z, 1.5 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
- 1238 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 2423 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
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 |
|---|---|---|---|---|
| Aug 7, 9:18 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Craighead, Greene, Mississippi, Randolph | 4 hr |
| Aug 7, 10:54 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Fulton, Greene, Izard, Lawrence and 3 more | 96 min |
| Aug 8, 2:04 PM CDT | Mesoscale Discussion | SPC | Arkansas, Clark, Cleburne, Conway, Crawford, Cross and 29 more | 86 min |
| Aug 8, 1:06 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, Grundy, Henderson and 19 more | 84 min |
| Aug 8, 5:23 PM CDT | Mesoscale Discussion | SPC | Bureau, Cass, Champaign, Christian, DeWitt, Ford and 21 more | 67 min |
| Aug 8, 5:38 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Champaign, DeWitt, Ford, Fulton, Grundy and 19 more | 5 hr |
| Aug 8, 5:00 PM CDT | Mesoscale Discussion | SPC | Boone, Bracken, Campbell, Gallatin, Grant, Kenton and 3 more | 2 hr |
| Aug 8, 12:46 AM CDT | Mesoscale Discussion | SPC | Barton, Bates, Benton, Cass, Cedar, Dade and 7 more | 59 min |
| Aug 8, 1:09 AM CDT | Severe Thunderstorm Watch | SPC | Barton, Bates, Benton, Camden, Cedar, Christian and 13 more | 3 hr |
| Aug 7, 7:13 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Grant, Harper, Kay, Woods | 3 hr |
| Aug 8, 5:30 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 30 more | 2 hr |
| Aug 8, 6:01 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Craig and 29 more | 6 hr |
Nearby
Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Arkansas, 2011Mesoscale Discussions in Tennessee, 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.