Alert archive / Texas / Mesoscale Discussions in 2004
Mesoscale Discussion 655
The Storm Prediction Center issued this mesoscale discussion at May 11, 2004, 3:00 PM CDT for 4 counties in Texas. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- May 11, 2004, 3:00 PM CDT (20:00 UTC)
- Expired
- May 11, 2004, 4:00 PM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
Counties Brazoria County, TX, Fort Bend County, TX, Harris County, TX, Matagorda County, TX
The radar
The Houston radar (KHGX), 73 km from the middle of the area, began a volume at 20:02 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
Corpus Christi, TX (KCRP), launched 12:00Z, 8.0 hours before the alert went out and 226 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
- 2170 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 548 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 6.7
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 |
|---|---|---|---|---|
| May 10, 7:43 PM CDT | Mesoscale Discussion | SPC | Armstrong, Bailey, Borden, Briscoe, Carson, Castro and 38 more | 2 hr |
| May 11, 9:37 AM CDT | Mesoscale Discussion | SPC | Aransas, Austin, Bee, Brazoria, Chambers, Colorado and 17 more | 113 min |
| May 11, 10:05 AM CDT | Mesoscale Discussion | SPC | Bee, Duval, Goliad, Jim Wells, Live Oak, McMullen and 2 more | 115 min |
| May 11, 10:55 AM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Austin, Bastrop, Bee, Brazoria and 33 more | 5 hr |
| May 11, 2:00 PM CDT | Mesoscale Discussion | SPC | Dallam, Hansford, Hartley, Hutchinson, Moore, Oldham and 1 more | 2 hr |
| May 11, 2:33 PM CDT | Mesoscale Discussion | SPC | Crane, Crockett, Glasscock, Irion, Midland, Pecos and 3 more | 117 min |
| May 11, 2:58 PM CDT | Mesoscale Discussion | SPC | Brazoria, Fort Bend, Harris, Matagorda | 62 min |
| May 11, 3:50 PM CDT | Severe Thunderstorm Watch | SPC | Chambers, Hardin, Harris, Jefferson, Liberty, Orange | 3 hr |
| May 11, 4:05 PM CDT | Severe Thunderstorm Watch | SPC | Armstrong, Bailey, Briscoe, Carson, Castro, Childress and 38 more | 6 hr |
| May 11, 6:03 PM CDT | Mesoscale Discussion | SPC | Chambers, Hardin, Jefferson, Liberty, Orange | 57 min |
Nearby
Mesoscale Discussions in Texas, 2004Every mesoscale discussion in 2004
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.