Alert archive / Tennessee / Mesoscale Discussions in 2003
Mesoscale Discussion 1881
The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2003, 12:45 PM CDT for 5 states. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2003, 12:45 PM CDT (17:45 UTC)
- Expired
- Jul 18, 2003, 1:45 PM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
All 61 counties
Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lee County, AR, Mississippi County, AR, Poinsett County, AR, St. Francis County, AR, Ballard County, KY, Calloway County, KY, Carlisle County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Butler County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Stoddard County, MO, Alcorn County, MS, Benton County, MS, DeSoto County, MS, Itawamba County, MS, Lee County, MS, Marshall County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur 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, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Perry County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Wayne County, TN, Weakley 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, 5.8 hours before the alert went out and 151 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
- 2491 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 1286 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 5:16 PM CDT | Mesoscale Discussion | SPC | Arkansas, Baxter, Cleburne, Conway, Crittenden, Cross and 23 more | 89 min |
| Jul 18, 6:50 AM CDT | Severe Thunderstorm Watch | SPC | Ballard | 5 hr |
| Jul 18, 9:55 AM CDT | Severe Thunderstorm Watch | SPC | Ballard, Calloway, Carlisle, Crittenden, Fulton, Graves and 6 more | 5 hr |
| Jul 18, 4:30 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Clark, Knox, Lewis, Lincoln, Marion and 7 more | 6 hr |
| Jul 18, 6:15 AM CDT | Mesoscale Discussion | SPC | Adair, Audrain, Bollinger, Cape Girardeau, Clark, Jefferson and 22 more | 60 min |
| Jul 18, 9:06 AM CDT | Mesoscale Discussion | SPC | Bollinger, Cape Girardeau, Franklin, Jefferson, Lincoln, Marion and 12 more | 84 min |
| Jul 18, 3:23 PM CDT | Mesoscale Discussion | SPC | Adair, Audrain, Bollinger, Callaway, Cape Girardeau, Carter and 30 more | 97 min |
| Jul 18, 3:45 PM CDT | Severe Thunderstorm Watch | SPC | Audrain, Bollinger, Butler, Callaway, Cape Girardeau, Carter and 24 more | 5 hr |
Nearby
Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Mississippi, 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.