Alert archive / Texas / Mesoscale Discussions in 2011
Mesoscale Discussion 1336
The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2011, 3:15 AM CDT for 4 states. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- Jun 21, 2011, 3:15 AM CDT (08:15 UTC)
- Expired
- Jun 21, 2011, 4:15 AM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
All 78 counties
Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR, Barry County, MO, Christian County, MO, Dade County, MO, Greene County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Polk County, MO, Stone County, MO, Taney County, MO, Adair County, OK, Atoka County, OK, Bryan County, OK, Choctaw County, OK, Coal County, OK, Haskell County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, Pittsburg County, OK, Pushmataha County, OK, Sequoyah County, OK, Bosque County, TX, Brown County, TX, Callahan County, TX, Coleman County, TX, Collin County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Grayson County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Mills County, TX, Montague County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Runnels County, TX, San Saba County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Taylor County, TX, Van Zandt County, TX, Wise County, TX
The radar
The Norman radar (KTLX), 158 km from the middle of the area, began a volume at 07:59 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
Norman, OK (KOUN), launched 00:00Z, 8.3 hours before the alert went out and 153 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
- 1985 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 2113 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 226 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 17.0
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 |
|---|---|---|---|---|
| Jun 20, 9:46 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 9 hr |
| Jun 21, 6:21 PM CDT | Mesoscale Discussion | SPC | Franklin, Howard, Johnson, Logan, Montgomery, Perry and 6 more | 54 min |
| Jun 21, 6:43 PM CDT | Severe Thunderstorm Watch | SPC | Conway, Garland, Howard, Johnson, Little River, Logan and 10 more | 6 hr |
| Jun 20, 7:46 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Bates, Buchanan, Caldwell, Cass and 12 more | 59 min |
| Jun 20, 8:32 PM CDT | Tornado Watch | SPC | Adair, Andrew, Atchison, Barton, Bates, Benton and 40 more | 4 hr |
| Jun 20, 10:22 PM CDT | Mesoscale Discussion | SPC | Adair, Caldwell, Carroll, Chariton, Clay, Clinton and 14 more | 83 min |
| Jun 21, 12:56 PM CDT | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 22 more | 64 min |
| Jun 21, 1:22 PM CDT | Tornado Watch | SPC | Bollinger, Cape Girardeau, Carter, Crawford, Dent, Franklin and 15 more | 9 hr |
| Jun 21, 3:31 PM CDT | Mesoscale Discussion | SPC | Bollinger, Butler, Cape Girardeau, Carter, Iron, Jefferson and 15 more | 89 min |
| Jun 20, 7:56 PM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Cotton, Creek, Garvin, Grady and 17 more | 94 min |
| Jun 21, 3:43 PM CDT | Mesoscale Discussion | SPC | Anderson, Bosque, Camp, Cass, Cherokee, Coryell and 32 more | 62 min |
| Jun 21, 4:58 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Angelina, Bell, Bosque, Brewster, Brown and 84 more | 10 hr |
| Jun 21, 6:59 PM CDT | Mesoscale Discussion | SPC | Angelina, Cherokee, Hardin, Houston, Jasper, Liberty and 10 more | 61 min |
Nearby
Mesoscale Discussions in Texas, 2011Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Missouri, 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.