Alert archive / Mississippi / Mesoscale Discussions in 2011
Mesoscale Discussion 1910
The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2011, 11:27 PM CDT for 6 counties in Arkansas; 11 counties in Mississippi. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2011, 11:27 PM CDT (04:27 UTC)
- Expired
- Aug 9, 2011, 1:00 AM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
Counties Arkansas County, AR, Desha County, AR, Lee County, AR, Lincoln County, AR, Monroe County, AR, Phillips County, AR, Bolivar County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Marshall County, MS, Panola County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Yalobusha County, MS
The radar
The Little Rock radar (KLZK), 139 km from the middle of the area, began a volume at 04:27 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 00:00Z, 4.5 hours before the alert went out and 102 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
- 4035 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1436 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 12.0
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 |
|---|---|---|---|---|
| Aug 8, 7:34 PM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Cleburne, Conway and 30 more | 116 min |
| Aug 8, 7:53 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Boone, Carroll, Crawford, Franklin, Johnson and 12 more | 7 hr |
| Aug 8, 8:39 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Desha, Jefferson, Lee, Lincoln, Monroe and 2 more | 6 hr |
| Aug 8, 11:00 PM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Carroll, Clark, Cleburne, Cleveland and 32 more | 2 hr |
| Aug 9, 2:21 AM CDT | Mesoscale Discussion | SPC | Arkansas, Benton, Carroll, Conway, Crawford, Faulkner and 26 more | 84 min |
| Aug 9, 1:20 PM CDT | Mesoscale Discussion | SPC | Clarke, Hinds, Jasper, Kemper, Lauderdale, Leake and 9 more | 115 min |
| Aug 9, 4:46 PM CDT | Severe Thunderstorm Watch | SPC | George, Greene, Perry, Stone, Wayne | 4 hr |
Nearby
Mesoscale Discussions in Mississippi, 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.