Alert archive / Mississippi / Mesoscale Discussions in 2011
Mesoscale Discussion 1254
The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2011, 6:18 PM CDT for 5 states. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jun 16, 2011, 6:18 PM CDT (23:18 UTC)
- Expired
- Jun 16, 2011, 7:45 PM CDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 57 counties
Arkansas County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Lee County, AR, Lincoln County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Fulton County, KY, Dunklin County, MO, New Madrid County, MO, Pemiscot County, MO, Attala County, MS, Benton County, MS, Bolivar County, MS, Carroll County, MS, Clarke County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Jasper County, MS, Lafayette County, MS, Leake County, MS, Leflore County, MS, Marshall County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Panola County, MS, Quitman County, MS, Scott County, MS, Smith County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Wayne County, MS, Yalobusha County, MS, Carroll County, TN, Chester County, TN, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Haywood County, TN, Henderson County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN
The radar
The Columbus AFB radar (KGWX), 129 km from the middle of the area, began a volume at 23:21 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
Little Rock, AR (KLZK), launched 12:00Z, 11.3 hours before the alert went out and 87 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
- 808 J/kg
- Mixed-layer CIN
- -190 J/kg
- Mixed-layer LCL
- 1856 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
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 |
|---|---|---|---|---|
| Jun 16, 12:26 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Washington | 7 hr |
| Jun 16, 3:41 PM CDT | Mesoscale Discussion | SPC | Arkansas, Bradley, Calhoun, Clark, Cleveland, Dallas and 23 more | 64 min |
| Jun 16, 4:41 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Clark, Clay, Cleveland, Craighead, Crittenden and 24 more | 7 hr |
| Jun 16, 5:17 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 58 min |
| Jun 15, 7:16 PM CDT | Mesoscale Discussion | SPC | Allen, Barren, Breckinridge, Bullitt, Butler, Edmonson and 13 more | 59 min |
| Jun 16, 12:02 PM CDT | Mesoscale Discussion | SPC | Clarke, Covington, Forrest, George, Greene, Jackson and 13 more | 58 min |
| Jun 16, 3:13 PM CDT | Mesoscale Discussion | SPC | Attala, Calhoun, Carroll, Chickasaw, Choctaw, Clarke and 32 more | 62 min |
| Jun 16, 3:39 PM CDT | Severe Thunderstorm Watch | SPC | Attala, Bolivar, Carroll, Choctaw, Clarke, Clay and 34 more | 5 hr |
Nearby
Mesoscale Discussions in Mississippi, 2011Mesoscale Discussions in Tennessee, 2011Mesoscale Discussions in Arkansas, 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.