Alert archive / Georgia / Mesoscale Discussions in 2007
Mesoscale Discussion 499
The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2007, 3:57 AM EDT for 45 counties in Georgia; 18 counties in South Carolina. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Apr 15, 2007, 3:57 AM EDT (07:57 UTC)
- Expired
- Apr 15, 2007, 5:30 AM EDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 63 counties
Appling County, GA, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Berrien County, GA, Bleckley County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Chatham County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Dodge County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, Mitchell County, GA, Montgomery County, GA, Pulaski County, GA, Richmond County, GA, Screven County, GA, Tattnall County, GA, Telfair County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Washington County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Clarendon County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC, Jasper County, SC, Lexington County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Charleston,SC radar (KCLX), 79 km from the middle of the area, began a volume at 07:58 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
Charleston AFB, SC (KCHS), launched 00:00Z, 8.0 hours before the alert went out and 179 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
- 329 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 638 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 186 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.6
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 14, 8:09 PM EDT | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 93 more | 2 hr |
| Apr 14, 10:10 PM EDT | Mesoscale Discussion | SPC | Burke, Columbia, Jenkins, Lincoln, Richmond, Screven | 95 min |
| Apr 14, 11:45 PM EDT | Tornado Watch | SPC | Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 57 more | 6 hr |
| Apr 15, 2:01 AM EDT | Tornado Watch | SPC | Burke | 7 hr |
| Apr 15, 5:57 AM EDT | Tornado Watch | SPC | Appling, Atkinson, Bacon, Bryan, Bulloch, Candler and 14 more | 5 hr |
| Apr 15, 10:20 AM EDT | Mesoscale Discussion | SPC | Chatham | 55 min |
| Apr 15, 3:33 AM EDT | Mesoscale Discussion | SPC | Chesterfield, Darlington, Fairfield, Kershaw, Lancaster, Lee and 3 more | 87 min |
| Apr 15, 7:39 AM EDT | Mesoscale Discussion | SPC | Bamberg, Berkeley, Calhoun, Charleston, Chesterfield, Clarendon and 13 more | 66 min |
| Apr 15, 8:08 AM EDT | Tornado Watch | SPC | Allendale, Bamberg, Barnwell, Beaufort, Berkeley, Calhoun and 17 more | 7 hr |
| Apr 15, 11:15 AM EDT | Mesoscale Discussion | SPC | Berkeley, Charleston, Dillon, Dorchester, Florence, Georgetown and 3 more | 2 hr |
| Apr 15, 12:19 PM EDT | Mesoscale Discussion | SPC | Chester, Lancaster, York | 86 min |
Nearby
Mesoscale Discussions in Georgia, 2007Mesoscale Discussions in South Carolina, 2007Every mesoscale discussion in 2007
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.