Alert archive / Texas / Mesoscale Discussions in 2011
Mesoscale Discussion 756
The Storm Prediction Center issued this mesoscale discussion at May 12, 2011, 11:43 AM CDT for 39 counties in Texas. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- May 12, 2011, 11:43 AM CDT (16:43 UTC)
- Expired
- May 12, 2011, 1:15 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 39 counties
Anderson County, TX, Aransas County, TX, Austin County, TX, Bee County, TX, Brazos County, TX, Burleson County, TX, Calhoun County, TX, Colorado County, TX, DeWitt County, TX, Duval County, TX, Fayette County, TX, Fort Bend County, TX, Freestone County, TX, Goliad County, TX, Grimes County, TX, Harris County, TX, Henderson County, TX, Houston County, TX, Jackson County, TX, Jim Hogg County, TX, Jim Wells County, TX, Lavaca County, TX, Leon County, TX, Liberty County, TX, Limestone County, TX, Live Oak County, TX, Madison County, TX, Montgomery County, TX, Navarro County, TX, Nueces County, TX, Refugio County, TX, Robertson County, TX, San Jacinto County, TX, San Patricio County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Austin/San Antonio radar (KEWX), 70 km from the middle of the area, began a volume at 16:46 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 nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 4.7 hours before the alert went out and 186 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
- 2980 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 458 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 2.9
- Supercell composite
- 13.7
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 11, 7:43 PM CDT | Mesoscale Discussion | SPC | Anderson, Bell, Blanco, Bowie, Burnet, Camp and 20 more | 62 min |
| May 11, 11:25 PM CDT | Mesoscale Discussion | SPC | Austin, Bandera, Bastrop, Bexar, Brazos, Burleson and 27 more | 65 min |
| May 12, 2:57 AM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Caldwell and 25 more | 33 min |
| May 12, 3:18 AM CDT | Severe Thunderstorm Watch | SPC | Bandera, Dimmit, Edwards, Frio, Kerr, Kinney and 7 more | 5 hr |
| May 12, 7:27 AM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bee, Bexar, Brooks, Dimmit and 26 more | 33 min |
| May 12, 7:52 AM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Bandera, Bee, Bexar, Brooks and 33 more | 9 hr |
| May 12, 8:46 AM CDT | Mesoscale Discussion | SPC | Bastrop, Bell, Bosque, Brazos, Burleson, Caldwell and 22 more | 59 min |
| May 12, 9:02 AM CDT | Severe Thunderstorm Watch | SPC | Anderson, Austin, Bastrop, Bell, Blanco, Bosque and 53 more | 6 hr |
| May 12, 1:46 PM CDT | Mesoscale Discussion | SPC | Fannin, Grayson, Lamar | 119 min |
| May 12, 3:17 PM CDT | Severe Thunderstorm Watch | SPC | Cooke, Fannin, Grayson, Lamar, Montague, Red River | 7 hr |
| May 12, 6:30 PM CDT | Mesoscale Discussion | SPC | Cooke, Fannin, Grayson, Lamar | 90 min |
Nearby
Mesoscale Discussions in Texas, 2011Every mesoscale discussion in 2011
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.