Alert archive / Alabama / Mesoscale Discussions in 2004
Mesoscale Discussion 2329
The Storm Prediction Center issued this mesoscale discussion at Oct 18, 2004, 6:02 PM CDT for 8 counties in Alabama; 6 counties in Tennessee. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Oct 18, 2004, 6:02 PM CDT (23:02 UTC)
- Expired
- Oct 18, 2004, 7:30 PM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
Counties Colbert County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Morgan County, AL, Franklin County, TN, Giles County, TN, Lawrence County, TN, Lincoln County, TN, Moore County, TN, Wayne County, TN
The radar
The Northeast Alabama radar (KHTX), 62 km from the middle of the area, began a volume at 23:03 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
Nashville Metro, TN (KBNA), launched 12:00Z, 11.0 hours before the alert went out and 149 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 920 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| Oct 18, 3:20 PM CDT | Tornado Watch | SPC | Colbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more | 5 hr |
| Oct 17, 11:30 PM CDT | Severe Thunderstorm Watch | SPC | Lake, Obion | 6 hr |
| Oct 18, 2:19 AM CDT | Mesoscale Discussion | SPC | Dyer, Lake, Obion | 56 min |
| Oct 18, 4:40 AM CDT | Mesoscale Discussion | SPC | Lake, Obion | 35 min |
| Oct 18, 7:44 AM CDT | Mesoscale Discussion | SPC | Carroll, Chester, Crockett, Dyer, Fayette, Gibson and 10 more | 61 min |
| Oct 18, 9:45 AM CDT | Tornado Watch | SPC | Fayette, Hardeman, McNairy, Shelby | 5 hr |
| Oct 18, 11:29 AM CDT | Mesoscale Discussion | SPC | Fayette, Hardeman, McNairy, Shelby | 91 min |
| Oct 18, 1:55 PM CDT | Mesoscale Discussion | SPC | Stewart | 95 min |
| Oct 18, 2:18 PM CDT | Mesoscale Discussion | SPC | Fayette, Hardeman, McNairy, Shelby | 57 min |
| Oct 18, 4:05 PM CDT | Tornado Watch | SPC | Carroll, Chester, Crockett, Dyer, Fayette, Gibson and 12 more | 5 hr |
Nearby
Mesoscale Discussions in Alabama, 2004Mesoscale Discussions in Tennessee, 2004Every mesoscale discussion in 2004
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.