Alert archive / Alabama / Mesoscale Discussions in 2013
Mesoscale Discussion 450
The Storm Prediction Center issued this mesoscale discussion at Apr 11, 2013, 5:35 PM CDT for 8 counties in Alabama; Escambia County, Okaloosa County, Santa Rosa County, Florida. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Apr 11, 2013, 5:35 PM CDT (22:35 UTC)
- Expired
- Apr 11, 2013, 7:30 PM CDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
Counties Baldwin County, AL, Butler County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Escambia County, AL, Monroe County, AL, Wilcox County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL
The radar
The Mobile radar (KMOB), 109 km from the middle of the area, began a volume at 22:35 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
Birmingham, AL (KBMX), launched 12:00Z, 10.6 hours before the alert went out and 253 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
- 35 J/kg
- Mixed-layer CIN
- -291 J/kg
- Mixed-layer LCL
- 635 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 143 m²/s²
- 0-3 km storm-relative helicity
- 169 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 |
|---|---|---|---|---|
| Apr 11, 10:41 AM CDT | Mesoscale Discussion | SPC | Colbert, Cullman, Fayette, Franklin, Greene, Hale and 12 more | 2 hr |
| Apr 11, 11:56 AM CDT | Tornado Watch | SPC | Autauga, Bibb, Blount, Chilton, Colbert, Coosa and 31 more | 7 hr |
| Apr 11, 12:59 PM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 5 more | 91 min |
| Apr 11, 1:30 PM CDT | Tornado Watch | SPC | Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more | 8 hr |
| Apr 11, 2:21 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Chilton, Coosa, Cullman and 12 more | 84 min |
| Apr 11, 3:26 PM CDT | Mesoscale Discussion | SPC | Chambers, Cleburne, Lee, Randolph, Russell | 94 min |
| Apr 11, 3:45 PM CDT | Tornado Watch | SPC | Barbour, Bullock, Calhoun, Chambers, Cherokee, Clay and 9 more | 6 hr |
| Apr 11, 5:03 PM CDT | Mesoscale Discussion | SPC | Coffee, Dale, Geneva, Henry, Houston | 2 hr |
| Apr 11, 5:54 PM CDT | Mesoscale Discussion | SPC | Autauga, Bullock, Calhoun, Chambers, Cherokee, Clay and 11 more | 96 min |
Nearby
Mesoscale Discussions in Alabama, 2013Mesoscale Discussions in Florida, 2013Every mesoscale discussion in 2013
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.