Alert archive / Alabama / Mesoscale Discussions in 2015
Mesoscale Discussion 378
The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2015, 1:14 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2015, 1:14 PM CDT (18:14 UTC)
- Expired
- Apr 19, 2015, 3:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 98 counties
Autauga County, AL, Bibb County, AL, Blount County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Colbert County, AL, Coosa County, AL, Cullman County, AL, Dallas County, AL, DeKalb County, AL, Elmore County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marengo County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Perry County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Dade County, GA, Douglas County, GA, Floyd County, GA, Gordon County, GA, Haralson County, GA, Heard County, GA, Paulding County, GA, Polk County, GA, Walker County, GA, Whitfield County, GA, Itawamba County, MS, Monroe County, MS, Tishomingo County, MS, Bedford County, TN, Bledsoe County, TN, Cannon County, TN, Cheatham County, TN, Coffee County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Hardin County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, Moore County, TN, Perry County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Sequatchie County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Birmingham radar (KBMX), 82 km from the middle of the area, began a volume at 18:17 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, 6.2 hours before the alert went out and 81 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
- 170 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 713 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 203 m²/s²
- 0-3 km storm-relative helicity
- 291 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.8
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 19, 2:06 AM CDT | Mesoscale Discussion | SPC | Choctaw, Clarke, Marengo, Washington | 84 min |
| Apr 19, 5:51 AM CDT | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Coffee and 17 more | 114 min |
| Apr 19, 6:57 AM CDT | Tornado Watch | SPC | Barbour, Bullock, Butler, Chambers, Clay, Coffee and 16 more | 7 hr |
| Apr 19, 5:25 PM CDT | Mesoscale Discussion | SPC | Calhoun, Cherokee, Cleburne, DeKalb, Etowah | 95 min |
| Apr 19, 9:40 AM CDT | Mesoscale Discussion | SPC | Bleckley, Calhoun, Crisp, Dodge, Dooly, Dougherty and 11 more | 2 hr |
| Apr 19, 11:24 AM CDT | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 46 more | 2 hr |
| Apr 19, 12:04 PM CDT | Tornado Watch | SPC | Appling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 33 more | 7 hr |
| Apr 19, 2:56 AM CDT | Mesoscale Discussion | SPC | Adams, Claiborne, Franklin, Jefferson, Warren, Wilkinson | 94 min |
| Apr 19, 4:45 PM CDT | Mesoscale Discussion | SPC | Bolivar, Coahoma, Tunica, Washington | 2 hr |
Nearby
Mesoscale Discussions in Alabama, 2015Mesoscale Discussions in Tennessee, 2015Mesoscale Discussions in Georgia, 2015Every mesoscale discussion in 2015
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.