Alert archive / Georgia / Mesoscale Discussions in 2017
Mesoscale Discussion 572
The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2017, 12:30 PM CDT for Barbour County, Russell County, Alabama; 51 counties in Georgia; Aiken County, Edgefield County, McCormick County, South Carolina. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2017, 12:30 PM CDT (17:30 UTC)
- Expired
- Apr 27, 2017, 2:00 PM CDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 56 counties
Barbour County, AL, Russell County, AL, Baldwin County, GA, Bibb County, GA, Bleckley County, GA, Burke County, GA, Butts County, GA, Chattahoochee County, GA, Columbia County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Emanuel County, GA, Glascock County, GA, Greene County, GA, Hancock County, GA, Harris County, GA, Houston County, GA, Jasper County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lincoln County, GA, Macon County, GA, Marion County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Muscogee County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Richmond County, GA, Schley County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Treutlen County, GA, Twiggs County, GA, Upson County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wilkinson County, GA, Aiken County, SC, Edgefield County, SC, McCormick County, SC
The radar
The Robins AFB radar (KJGX), 30 km from the middle of the area, began a volume at 17:32 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 5.5 hours before the alert went out and 108 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
- 45 J/kg
- Mixed-layer CIN
- -363 J/kg
- Mixed-layer LCL
- 703 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 351 m²/s²
- 0-3 km storm-relative helicity
- 395 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 |
|---|---|---|---|---|
| Apr 26, 11:02 PM CDT | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Chilton, Coosa, Dallas, Elmore and 16 more | 6 hr |
| Apr 27, 1:36 AM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Chilton, Choctaw, Clarke, Dallas and 11 more | 114 min |
| Apr 27, 9:42 AM CDT | Mesoscale Discussion | SPC | Barbour, Bullock, Coffee, Covington, Dale, Pike and 1 more | 2 hr |
| Apr 27, 3:23 PM CDT | Mesoscale Discussion | SPC | Barbour, Henry, Lee, Russell | 97 min |
| Apr 27, 6:26 PM CDT | Mesoscale Discussion | SPC | Barbour, Bullock, Crenshaw, Pike, Russell | 64 min |
| Apr 27, 12:47 PM CDT | Tornado Watch | SPC | Baldwin, Bibb, Bleckley, Burke, Butts, Chattahoochee and 44 more | 8 hr |
| Apr 27, 2:29 PM CDT | Mesoscale Discussion | SPC | Banks, Forsyth, Franklin, Habersham, Hall, Hart and 7 more | 91 min |
Nearby
Mesoscale Discussions in Georgia, 2017Mesoscale Discussions in South Carolina, 2017Mesoscale Discussions in Alabama, 2017Every mesoscale discussion in 2017
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.