Alert archive / Mississippi / Mesoscale Discussions in 2003
Mesoscale Discussion 1806
The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2003, 11:30 AM CDT for 17 counties in Arkansas; 18 counties in Mississippi; Fayette County, Shelby County, Tennessee. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 13, 2003, 11:30 AM CDT (16:30 UTC)
- Expired
- Jul 13, 2003, 1:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 37 counties
Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Cleveland County, AR, Columbia County, AR, Crittenden County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Monroe County, AR, Nevada County, AR, Ouachita County, AR, Phillips County, AR, St. Francis County, AR, Alcorn County, MS, Benton County, MS, Bolivar County, MS, Coahoma County, MS, DeSoto County, MS, Lafayette County, MS, Marshall County, MS, Panola County, MS, Prentiss County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS, Fayette County, TN, Shelby County, TN
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Little Rock, AR (KLZK), launched 12:00Z, 4.5 hours before the alert went out and 170 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
- 2438 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1048 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
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 |
|---|---|---|---|---|
| Jul 13, 11:55 AM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 11 more | 6 hr |
| Jul 13, 1:30 PM CDT | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Crawford, Franklin, Johnson and 6 more | 60 min |
| Jul 13, 3:53 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Chicot, Crittenden, Desha, Lee and 3 more | 67 min |
| Jul 13, 4:44 PM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Clay, Cleburne, Craighead, Fulton and 12 more | 61 min |
| Jul 13, 5:10 PM CDT | Severe Thunderstorm Watch | SPC | Baxter, Boone, Carroll, Cleburne, Craighead, Crittenden and 18 more | 5 hr |
| Jul 13, 5:55 PM CDT | Severe Thunderstorm Watch | SPC | Chicot | 4 hr |
| Jul 13, 6:54 PM CDT | Mesoscale Discussion | SPC | Crittenden, Cross, Jackson, Lee, Monroe, Poinsett and 4 more | 96 min |
| Jul 13, 11:02 AM CDT | Mesoscale Discussion | SPC | Adams, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 45 more | 118 min |
| Jul 13, 1:55 PM CDT | Severe Thunderstorm Watch | SPC | Adams | 5 hr |
| Jul 13, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | Lowndes | 5 hr |
| Jul 13, 4:33 PM CDT | Mesoscale Discussion | SPC | Adams | 87 min |
| Jul 13, 12:16 PM CDT | Mesoscale Discussion | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 39 more | 119 min |
| Jul 13, 5:26 PM CDT | Mesoscale Discussion | SPC | Anderson, Bledsoe, Blount, Bradley, Cumberland, Grundy and 11 more | 94 min |
Nearby
Mesoscale Discussions in Mississippi, 2003Mesoscale Discussions in Arkansas, 2003Mesoscale Discussions in Tennessee, 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.