Alert archive / Alabama / Mesoscale Discussions in 2011
Mesoscale Discussion 783
The Storm Prediction Center issued this mesoscale discussion at May 14, 2011, 12:54 AM CDT for 20 counties in Alabama; Escambia County, Santa Rosa County, Florida; 11 counties in Mississippi. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- May 14, 2011, 12:54 AM CDT (05:54 UTC)
- Expired
- May 14, 2011, 2:30 AM CDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 33 counties
Autauga County, AL, Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dallas County, AL, Escambia County, AL, Lowndes County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Santa Rosa County, FL, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Lamar County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Wayne County, MS
The radar
The Mobile radar (KMOB), 73 km from the middle of the area, began a volume at 05:56 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 5.9 hours before the alert went out and 212 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
- 1147 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 1126 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
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 |
|---|---|---|---|---|
| May 13, 7:58 PM CDT | Mesoscale Discussion | SPC | Colbert, Fayette, Franklin, Greene, Lamar, Lauderdale and 6 more | 62 min |
| May 14, 1:31 PM CDT | Mesoscale Discussion | SPC | DeSoto, Glades, Hardee, Hendry, Highlands, Hillsborough and 8 more | 59 min |
| May 14, 5:05 PM CDT | Mesoscale Discussion | SPC | Baker, Columbia, Dixie, Gilchrist, Hamilton, Jefferson and 6 more | 55 min |
Nearby
Mesoscale Discussions in Alabama, 2011Mesoscale Discussions in Mississippi, 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.