Alert archive / Florida / Mesoscale Discussions in 2017
Mesoscale Discussion 1104
The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2017, 8:15 PM CDT for Baldwin County, Mobile County, Alabama; 10 counties in Florida; Harrison County, Jackson County, Mississippi. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 20, 2017, 8:15 PM CDT (01:15 UTC)
- Expired
- Jun 20, 2017, 10:45 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
Counties Baldwin County, AL, Mobile County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gulf County, FL, Holmes County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Harrison County, MS, Jackson County, MS
The radar
The Eglin Afb radar (KEVX), 101 km from the middle of the area, began a volume at 01:16 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 1.3 hours before the alert went out and 264 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
- 18 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 541 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- -21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
<!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 |
|---|---|---|---|---|
| Jun 20, 9:48 PM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 57 min |
| Jun 20, 10:24 PM CDT | Tornado Watch | SPC | Baldwin, Mobile | 12 hr |
| Jun 21, 2:08 AM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 2 hr |
| Jun 21, 7:47 AM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 118 min |
| Jun 21, 10:01 AM CDT | Tornado Watch | SPC | Baldwin, Covington, Escambia, Mobile | 9 hr |
| Jun 21, 3:42 PM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 93 min |
| Jun 21, 6:29 PM CDT | Mesoscale Discussion | SPC | Baldwin, Conecuh, Covington, Escambia, Mobile, Washington | 61 min |
| Jun 21, 6:45 PM CDT | Tornado Watch | SPC | Baldwin, Butler, Clarke, Conecuh, Covington, Crenshaw and 5 more | 8 hr |
Nearby
Mesoscale Discussions in Florida, 2017Mesoscale Discussions in Alabama, 2017Mesoscale Discussions in Mississippi, 2017Every mesoscale discussion in 2017
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.