Alert archive / Georgia / Mesoscale Discussions in 2020
Mesoscale Discussion 230
The Storm Prediction Center issued this mesoscale discussion at Mar 24, 2020, 7:05 PM CDT for 11 counties in Alabama; 16 counties in Georgia; 5 counties in Tennessee. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Mar 24, 2020, 7:05 PM CDT (00:05 UTC)
- Expired
- Mar 24, 2020, 8:00 PM CDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 32 counties
Cherokee County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Jackson County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Winston County, AL, Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Dade County, GA, Dawson County, GA, Fannin County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Walker County, GA, Whitfield County, GA, Bradley County, TN, Franklin County, TN, Hamilton County, TN, Marion County, TN, Polk County, TN
The radar
The Northeast Alabama radar (KHTX), 46 km from the middle of the area, began a volume at 00:06 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
Nashville Metro, TN (KBNA), launched 00:00Z, 0.1 hours before the alert went out and 180 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
- 16 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 627 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 24, 7:44 PM CDT | Tornado Watch | SPC | Blount, Cherokee, Etowah, Fayette, Walker | 3 hr |
| Mar 24, 9:45 PM CDT | Mesoscale Discussion | SPC | Calhoun, Cherokee | 60 min |
Nearby
Mesoscale Discussions in Georgia, 2020Mesoscale Discussions in Alabama, 2020Mesoscale Discussions in Tennessee, 2020Every mesoscale discussion in 2020
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.