Alert archive / Illinois / Mesoscale Discussions in 2003
Mesoscale Discussion 2519
The Storm Prediction Center issued this mesoscale discussion at Nov 18, 2003, 7:35 AM CST for 4 states. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Nov 18, 2003, 7:35 AM CST (13:35 UTC)
- Expired
- Nov 18, 2003, 9:30 AM CST
- In force
- 115 min
- Issued by
- the Storm Prediction Center
All 52 counties
Alexander County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Lawrence County, IL, Marion County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Richland County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Gibson County, IN, Knox County, IN, Parke County, IN, Posey County, IN, Sullivan County, IN, Vanderburgh County, IN, Vermillion County, IN, Vigo County, IN, Warrick County, IN, Ballard County, KY, Carlisle County, KY, Crittenden County, KY, Henderson County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Union County, KY, Webster County, KY, Cape Girardeau County, MO, Mississippi County, MO, Scott County, MO
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 1.6 hours before the alert went out and 273 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
- 1000 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 325 m²/s²
- 0-3 km storm-relative helicity
- 386 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Nov 18, 1:29 AM CST | Mesoscale Discussion | SPC | Alexander, Pulaski | 3 hr |
| Nov 18, 1:33 PM CST | Mesoscale Discussion | SPC | Adair, Allen, Barren, Boyle, Casey, Clinton and 15 more | 57 min |
| Nov 18, 1:55 AM CST | Tornado Watch | SPC | Dunklin, Pemiscot | 6 hr |
| Nov 18, 9:55 AM CST | Mesoscale Discussion | SPC | Barry, Barton, Christian, Dade, Douglas, Greene and 7 more | 65 min |
| Nov 18, 2:50 PM CST | Severe Thunderstorm Watch | SPC | Barry, Christian, Douglas, Howell, Oregon, Ozark and 2 more | 5 hr |
| Nov 18, 4:44 PM CST | Mesoscale Discussion | SPC | Howell, Oregon, Ozark, Taney | 2 hr |
Nearby
Mesoscale Discussions in Illinois, 2003Mesoscale Discussions in Kentucky, 2003Mesoscale Discussions in Indiana, 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.