Alert archive / Louisiana / Mesoscale Discussions in 2007
Mesoscale Discussion 423
The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2007, 11:29 AM CDT for 20 parishes in Louisiana; 16 counties in Mississippi; 4 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 3, 2007, 11:29 AM CDT (16:29 UTC)
- Expired
- Apr 3, 2007, 1:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 40 counties
Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jefferson Davis Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Richland Parish, LA, Tensas Parish, LA, Vernon Parish, LA, Winn Parish, LA, Adams County, MS, Claiborne County, MS, Copiah County, MS, Franklin County, MS, Hinds County, MS, Holmes County, MS, Issaquena County, MS, Jefferson County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Warren County, MS, Yazoo County, MS, Hardin County, TX, Jasper County, TX, Newton County, TX, Orange County, TX
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 4.5 hours before the alert went out and 194 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
- 724 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 733 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 0.7
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 |
|---|---|---|---|---|
| Apr 3, 3:12 PM CDT | Tornado Watch | SPC | Alcorn, Benton, DeSoto, Marshall, Prentiss, Tate and 3 more | 7 hr |
| Apr 3, 6:15 PM CDT | Mesoscale Discussion | SPC | DeSoto, Tunica | 60 min |
| Apr 3, 2:17 PM CDT | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Collin, Dallas, Delta and 19 more | 118 min |
| Apr 3, 4:23 PM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Comanche, Erath, Hamilton, Hood and 5 more | 3 hr |
| Apr 3, 5:10 PM CDT | Mesoscale Discussion | SPC | Bandera, Blanco, Gillespie, Kendall, Kerr, Llano and 1 more | 3 hr |
| Apr 3, 5:47 PM CDT | Severe Thunderstorm Watch | SPC | Bandera, Bell, Blanco, Bosque, Bowie, Burnet and 49 more | 7 hr |
Nearby
Mesoscale Discussions in Louisiana, 2007Mesoscale Discussions in Mississippi, 2007Mesoscale Discussions in Texas, 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.