Alert archive / Tennessee / Mesoscale Discussions in 2003
Mesoscale Discussion 661
The Storm Prediction Center issued this mesoscale discussion at May 1, 2003, 11:23 AM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 1, 2003, 11:23 AM CDT (16:23 UTC)
- Expired
- May 1, 2003, 1:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 52 counties
Crittenden County, AR, Cross County, AR, Mississippi County, AR, St. Francis County, AR, Butler County, KY, Caldwell County, KY, Calloway County, KY, Christian County, KY, Hopkins County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McLean County, KY, Muhlenberg County, KY, Ohio County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Webster County, KY, Benton County, MS, DeSoto County, MS, Marshall County, MS, Tate County, MS, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Weakley County, TN
The radar
The Paducah radar (KPAH), 98 km from the middle of the area, began a volume at 16:23 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, 4.4 hours before the alert went out and 178 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
- 358 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 1214 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
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 |
|---|---|---|---|---|
| May 1, 7:51 AM CDT | Mesoscale Discussion | SPC | Baxter, Clay, Fulton, Izard, Randolph, Searcy and 1 more | 114 min |
| May 1, 9:35 AM CDT | Severe Thunderstorm Watch | SPC | Clay, Craighead, Greene | 5 hr |
| May 1, 2:13 PM CDT | Mesoscale Discussion | SPC | Howard, Little River, Polk, Scott, Sevier | 3 hr |
| May 1, 2:55 PM CDT | Tornado Watch | SPC | Little River | 5 hr |
| May 1, 3:45 PM CDT | Tornado Watch | SPC | Benton, Carroll, Crawford, Franklin, Howard, Johnson and 9 more | 5 hr |
| May 1, 6:10 PM CDT | Mesoscale Discussion | SPC | Arkansas, Dallas, Hempstead, Jefferson, Lee, Little River and 3 more | 95 min |
| May 1, 6:58 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Franklin, Hempstead, Howard and 10 more | 92 min |
| May 1, 12:15 PM CDT | Severe Thunderstorm Watch | SPC | Breckinridge, Bullitt, Butler, Caldwell, Calloway, Christian and 27 more | 5 hr |
| May 1, 2:35 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Anderson, Barren, Bath, Bourbon and 53 more | 5 hr |
| May 1, 5:11 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Boone and 52 more | 94 min |
| May 1, 3:16 PM CDT | Mesoscale Discussion | SPC | Calhoun, Chickasaw, Clay, Itawamba, Lee, Lowndes and 4 more | 119 min |
| May 1, 10:22 AM CDT | Mesoscale Discussion | SPC | Blount, Carter, Cocke, Greene, Hawkins, Jefferson and 7 more | 113 min |
Nearby
Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Kentucky, 2003Mesoscale Discussions in Arkansas, 2003Every mesoscale discussion in 2003
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.