Alert archive / Georgia / Mesoscale Discussions in 2007
Mesoscale Discussion 462
The Storm Prediction Center issued this mesoscale discussion at Apr 11, 2007, 9:39 PM EDT for 19 counties in Georgia; 6 counties in South Carolina. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Apr 11, 2007, 9:39 PM EDT (01:39 UTC)
- Expired
- Apr 11, 2007, 11:15 PM EDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 25 counties
Appling County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Chatham County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Jenkins County, GA, Johnson County, GA, Liberty County, GA, Long County, GA, Montgomery County, GA, Screven County, GA, Tattnall County, GA, Toombs County, GA, Treutlen County, GA, Wheeler County, GA, Allendale County, SC, Bamberg County, SC, Beaufort County, SC, Colleton County, SC, Hampton County, SC, Jasper County, SC
The radar
The Charleston,SC radar (KCLX), 70 km from the middle of the area, began a volume at 01:41 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, 1.7 hours before the alert went out and 171 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
- 289 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 740 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 125 m²/s²
- 0-3 km storm-relative helicity
- 209 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.4
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 11, 10:43 PM EDT | Mesoscale Discussion | SPC | Baldwin, Burke, Clarke, Columbia, Elbert, Glascock and 16 more | 62 min |
| Apr 11, 11:01 PM EDT | Severe Thunderstorm Watch | SPC | Baldwin, Bleckley, Bulloch, Burke, Candler, Columbia and 30 more | 6 hr |
| Apr 12, 4:01 AM EDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 4 more | 89 min |
| Apr 12, 12:16 AM EDT | Mesoscale Discussion | SPC | Dillon, Marlboro | 89 min |
| Apr 12, 12:55 AM EDT | Severe Thunderstorm Watch | SPC | Darlington, Dillon, Florence, Marion, Marlboro | 3 hr |
| Apr 12, 2:39 AM EDT | Mesoscale Discussion | SPC | Dillon | 66 min |
| Apr 12, 3:25 AM EDT | Tornado Watch | SPC | Dillon, Florence, Georgetown, Horry, Marion, Williamsburg | 8 hr |
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.