Alert archive / Mississippi / Mesoscale Discussions in 2011
Mesoscale Discussion 1243
The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2011, 12:02 PM CDT for 7 counties in Alabama; Escambia County, Santa Rosa County, Florida; 19 counties in Mississippi. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- Jun 16, 2011, 12:02 PM CDT (17:02 UTC)
- Expired
- Jun 16, 2011, 1:00 PM CDT
- In force
- 58 min
- Issued by
- the Storm Prediction Center
All 28 counties
Baldwin County, AL, Choctaw County, AL, Clarke County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Escambia County, FL, Santa Rosa County, FL, Clarke County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Jackson County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Newton County, MS, Perry County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Wayne County, MS
The radar
The Mobile radar (KMOB), 95 km from the middle of the area, began a volume at 17:01 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
Jackson, MS (KJAN), launched 12:00Z, 5.0 hours before the alert went out and 189 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
- 2865 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 913 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 39 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 |
|---|---|---|---|---|
| Jun 16, 3:13 PM CDT | Mesoscale Discussion | SPC | Choctaw, Clarke, Marengo, Monroe, Sumter, Washington | 62 min |
| Jun 16, 3:39 PM CDT | Severe Thunderstorm Watch | SPC | Choctaw, Washington | 5 hr |
| Jun 16, 4:41 PM CDT | Severe Thunderstorm Watch | SPC | Alcorn, Benton, Coahoma, DeSoto, Marshall, Panola and 6 more | 7 hr |
| Jun 16, 6:18 PM CDT | Mesoscale Discussion | SPC | Attala, Benton, Bolivar, Carroll, Clarke, Coahoma and 19 more | 87 min |
Nearby
Mesoscale Discussions in Mississippi, 2011Mesoscale Discussions in Alabama, 2011Mesoscale Discussions in Florida, 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.