Alert archive / Georgia / Mesoscale Discussions in 2017
Mesoscale Discussion 445
The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2017, 2:12 PM CDT for 4 states. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Apr 5, 2017, 2:12 PM CDT (19:12 UTC)
- Expired
- Apr 5, 2017, 3:45 PM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 107 counties
Barbour County, AL, Bullock County, AL, Dale County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Macon County, AL, Russell County, AL, Bay County, FL, Calhoun County, FL, Gadsden County, FL, Jackson County, FL, Washington County, FL, Appling County, GA, Bacon County, GA, Baker County, GA, Baldwin County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Calhoun County, GA, Candler County, GA, Chattahoochee County, GA, Clay County, GA, Coffee County, GA, Colquitt County, GA, Columbia 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, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glascock County, GA, Grady County, GA, Greene County, GA, Hancock County, GA, Harris County, GA, Houston County, GA, Irwin County, GA, Jasper County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lee County, GA, Lincoln County, GA, Macon County, GA, Marion County, GA, McDuffie County, GA, Miller County, GA, Mitchell County, GA, Monroe County, GA, Montgomery County, GA, Muscogee County, GA, Peach County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Richmond County, GA, Schley County, GA, Screven County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Tattnall 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, Aiken County, SC, Allendale County, SC, Barnwell County, SC, Edgefield County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Saluda County, SC
The radar
The Robins AFB radar (KJGX), 68 km from the middle of the area, began a volume at 19:13 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.2 hours before the alert went out and 130 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
- 703 J/kg
- Mixed-layer CIN
- -129 J/kg
- Mixed-layer LCL
- 624 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 320 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.2
The text
As transmitted.
486 ACUS11 KWNS 051912 SWOMCD SPC MCD 051912 SCZ000-GAZ000-FLZ000-ALZ000-052045- Mesoscale Discussion 0445 NWS Storm Prediction Center Norman OK 0212 PM CDT Wed Apr 05 2017 Areas affected...Southeast AL...FL Panhandle...GA...SC Concerning...Tornado Watch 125... Valid 051912Z - 052045Z The severe weather threat for Tornado Watch 125 continues. SUMMARY...Tornado threat continues across ww125. DISCUSSION...Early-day MCS that developed over northern GA has progressed into central SC where embedded supercells remain active along the leading edge of thunderstorm complex. Low-level warm advection should encourage this activity to propagate into coastal portions of SC over the next few hours. Farther southwest...greatest buoyancy currently extends along a corridor from northern FL into southeast GA. Visible satellite imagery supports this with numerous open-cell CU observed across the warm sector where surface temperatures have warmed into the lower 80s. While an MCS appears to be slowly maturing over south-central GA, wind fields remain strong and supportive of supercells and tornadoes. Otherwise, large hail and damaging winds remain likely with the most robust convection. ..Darrow.. 04/05/2017 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...CHS...CAE...GSP...JAX...FFC...TAE...BMX... LAT...LON 32428575 34588118 32138119 29988576 32428575
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 11:54 PM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Clarke, Coffee, Conecuh, Covington and 8 more | 2 hr |
| Apr 5, 1:37 AM CDT | Severe Thunderstorm Watch | SPC | Autauga, Barbour, Bibb, Blount, Bullock, Butler and 42 more | 6 hr |
| Apr 5, 3:41 AM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Bullock, Butler, Chambers and 38 more | 2 hr |
| Apr 5, 6:15 AM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Bullock, Butler, Calhoun and 35 more | 90 min |
| Apr 5, 6:54 AM CDT | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 44 more | 8 hr |
| Apr 5, 9:43 AM CDT | Mesoscale Discussion | SPC | Barbour, Chambers, Lee, Macon, Russell, Tallapoosa | 2 hr |
| Apr 5, 11:54 AM CDT | Tornado Watch | SPC | Dale, Geneva, Henry, Houston | 10 hr |
| Apr 5, 1:02 PM CDT | Mesoscale Discussion | SPC | Blount, Cullman, DeKalb, Jackson, Jefferson, Lauderdale and 8 more | 2 hr |
| Apr 5, 1:50 PM CDT | Tornado Watch | SPC | Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 36 more | 8 hr |
| Apr 5, 3:29 PM CDT | Mesoscale Discussion | SPC | Baldwin, Clarke, Conecuh, Escambia, Marengo, Mobile and 3 more | 3 hr |
| Apr 5, 3:51 PM CDT | Mesoscale Discussion | SPC | Blount, Calhoun, Chambers, Cherokee, Chilton, Clay and 19 more | 84 min |
| Apr 5, 6:57 PM CDT | Mesoscale Discussion | SPC | Autauga, Blount, Bullock, Calhoun, Chambers, Cherokee and 20 more | 48 min |
| Apr 5, 10:38 AM CDT | Mesoscale Discussion | SPC | Leon | 97 min |
| Apr 5, 9:25 AM CDT | Mesoscale Discussion | SPC | Baldwin, Banks, Barrow, Bartow, Burke, Butts and 45 more | 95 min |
| Apr 5, 5:29 PM CDT | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Berrien, Brantley, Brooks and 22 more | 61 min |
| Apr 5, 1:02 PM CDT | Mesoscale Discussion | SPC | Darlington, Dillon, Florence, Lee, Marion, Williamsburg | 58 min |
| Apr 5, 1:45 PM CDT | Tornado Watch | SPC | Darlington, Dillon, Florence, Georgetown, Horry, Marion and 2 more | 5 hr |
| Apr 5, 3:23 PM CDT | Mesoscale Discussion | SPC | Berkeley, Darlington, Dillon, Florence, Georgetown, Horry and 2 more | 97 min |
Nearby
Mesoscale Discussions in Georgia, 2017Mesoscale Discussions in Alabama, 2017Mesoscale Discussions in South Carolina, 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.