Alert archive / Georgia / Mesoscale Discussions in 2019
Mesoscale Discussion 618
The Storm Prediction Center issued this mesoscale discussion at May 12, 2019, 11:11 AM CDT for Henry County, Alabama; 18 counties in Florida; 49 counties in Georgia. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- May 12, 2019, 11:11 AM CDT (16:11 UTC)
- Expired
- May 12, 2019, 12:15 PM CDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 68 counties
Henry County, AL, Baker County, FL, Bay County, FL, Calhoun County, FL, Columbia County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Hamilton County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Nassau County, FL, Suwannee County, FL, Taylor County, FL, Wakulla County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Calhoun County, GA, Camden County, GA, Charlton County, GA, Clay County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Lee County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Pierce County, GA, Seminole County, GA, Tattnall County, GA, Telfair County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA
The radar
The Tallahassee radar (KTLH), 45 km from the middle of the area, began a volume at 16:10 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
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 4.2 hours before the alert went out and 44 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
- 659 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 847 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.6
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 |
|---|---|---|---|---|
| May 12, 8:39 AM CDT | Mesoscale Discussion | SPC | Geneva, Houston | 2 hr |
| May 12, 8:59 AM CDT | Severe Thunderstorm Watch | SPC | Geneva, Henry, Houston | 5 hr |
| May 12, 11:41 AM CDT | Severe Thunderstorm Watch | SPC | Hamilton, Jefferson, Madison | 6 hr |
| May 12, 2:04 PM CDT | Mesoscale Discussion | SPC | Baker, Columbia, Hamilton, Jefferson, Lafayette, Madison and 3 more | 56 min |
| May 12, 3:23 PM CDT | Mesoscale Discussion | SPC | Baker, Columbia, Hamilton, Nassau | 2 hr |
| May 12, 10:50 AM CDT | Mesoscale Discussion | SPC | Bryan, Chatham, Effingham, Evans, Liberty, Tattnall | 85 min |
Nearby
Mesoscale Discussions in Georgia, 2019Mesoscale Discussions in Florida, 2019Mesoscale Discussions in Alabama, 2019Every mesoscale discussion in 2019
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.