Alert archive / Alabama / Mesoscale Discussions in 2018
Mesoscale Discussion 143
The Storm Prediction Center issued this mesoscale discussion at Mar 19, 2018, 9:52 AM CDT for 20 counties in Alabama; 5 counties in Georgia. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- Mar 19, 2018, 9:52 AM CDT (14:52 UTC)
- Expired
- Mar 19, 2018, 11:15 AM CDT
- In force
- 83 min
- Issued by
- the Storm Prediction Center
All 25 counties
Blount County, AL, Calhoun County, AL, Cherokee County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Franklin County, AL, Jackson County, AL, Jefferson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, St. Clair County, AL, Walker County, AL, Winston County, AL, Chattooga County, GA, Dade County, GA, Floyd County, GA, Polk County, GA, Walker County, GA
The radar
The Northeast Alabama radar (KHTX), 88 km from the middle of the area, began a volume at 14:56 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
Birmingham, AL (KBMX), launched 12:00Z, 2.9 hours before the alert went out and 126 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
- 563 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 505 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 19, 11:18 AM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Lauderdale | 87 min |
| Mar 19, 2:06 PM CDT | Mesoscale Discussion | SPC | Blount, Colbert, Cullman, DeKalb, Etowah, Fayette and 14 more | 84 min |
| Mar 19, 3:28 PM CDT | Tornado Watch | SPC | Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 30 more | 9 hr |
| Mar 19, 5:06 PM CDT | Mesoscale Discussion | SPC | Colbert, Cullman, Franklin, Lawrence, Marion, Morgan and 1 more | 114 min |
| Mar 19, 6:59 PM CDT | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Cleburne, Cullman, Etowah and 2 more | 91 min |
Nearby
Mesoscale Discussions in Alabama, 2018Mesoscale Discussions in Georgia, 2018Every mesoscale discussion in 2018
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.