Alert archive / Georgia / Mesoscale Discussions in 2013
Mesoscale Discussion 531
The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2013, 10:42 AM CDT for Henry County, Houston County, Alabama; 15 counties in Florida; 86 counties in Georgia. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2013, 10:42 AM CDT (15:42 UTC)
- Expired
- Apr 19, 2013, 1:15 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 103 counties
Henry County, AL, Houston County, AL, Bay County, FL, Calhoun 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, Taylor County, FL, Wakulla County, FL, Washington County, FL, Atkinson County, GA, Bacon County, GA, Baker County, GA, Baldwin County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Brooks County, GA, Butts County, GA, Calhoun County, GA, Chattahoochee County, GA, Clarke County, GA, Clay County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Elbert County, GA, Emanuel County, GA, Glascock County, GA, Grady County, GA, Greene County, GA, Hancock County, GA, Hart County, GA, Houston County, GA, Irwin County, GA, Jasper County, GA, Jeff Davis County, GA, Jefferson County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Lowndes County, GA, Macon County, GA, Madison County, GA, Marion County, GA, McDuffie County, GA, Miller County, GA, Mitchell County, GA, Monroe County, GA, Montgomery County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Peach County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkes County, GA, Wilkinson County, GA, Worth County, GA
The radar
The Tallahassee radar (KTLH), 48 km from the middle of the area, began a volume at 15:45 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, 3.7 hours before the alert went out and 47 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
- 58 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 627 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 233 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 18, 8:46 PM CDT | Mesoscale Discussion | SPC | Colbert, Fayette, Franklin, Greene, Lamar, Lauderdale and 6 more | 59 min |
| Apr 19, 1:52 AM CDT | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Clay, Cleburne, DeKalb and 8 more | 83 min |
| Apr 19, 11:37 AM CDT | Severe Thunderstorm Watch | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Jackson and 6 more | 6 hr |
| Apr 19, 12:57 PM CDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Calhoun, Clay, Columbia and 17 more | 2 hr |
| Apr 19, 3:29 PM CDT | Mesoscale Discussion | SPC | Hamilton, Jefferson, Lafayette, Madison, Taylor, Wakulla | 2 hr |
| Apr 19, 5:37 PM CDT | Mesoscale Discussion | SPC | Hamilton, Madison, Taylor | 113 min |
| Apr 19, 1:00 PM CDT | Tornado Watch | SPC | Elbert, Hart | 7 hr |
| Apr 19, 1:36 PM CDT | Severe Thunderstorm Watch | SPC | Appling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 20 more | 7 hr |
Nearby
Mesoscale Discussions in Georgia, 2013Mesoscale Discussions in Florida, 2013Mesoscale Discussions in Alabama, 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.