Alert archive / Texas / Mesoscale Discussions in 2009
Mesoscale Discussion 86
The Storm Prediction Center issued this mesoscale discussion at Feb 10, 2009, 3:45 PM CST for 22 counties in Texas. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Feb 10, 2009, 3:45 PM CST (21:45 UTC)
- Expired
- Feb 10, 2009, 5:15 PM CST
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 22 counties
Brown County, TX, Callahan County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Eastland County, TX, Kimble County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mills County, TX, Palo Pinto County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Shackelford County, TX, Stephens County, TX, Sutton County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Young County, TX
The radar
The Dyess AFB radar (KDYX), 48 km from the middle of the area, began a volume at 21:46 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
Fort Worth, TX (KFWD), launched 12:00Z, 9.8 hours before the alert went out and 212 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
- 235 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 680 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 148 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.6
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 |
|---|---|---|---|---|
| Feb 10, 12:17 PM CST | Mesoscale Discussion | SPC | Archer, Baylor, Bosque, Brown, Callahan, Clay and 32 more | 118 min |
| Feb 10, 12:49 PM CST | Tornado Watch | SPC | Archer, Baylor, Brown, Callahan, Clay, Coleman and 26 more | 9 hr |
| Feb 10, 2:16 PM CST | Mesoscale Discussion | SPC | Camp, Collin, Dallas, Delta, Denton, Ellis and 19 more | 119 min |
| Feb 10, 2:33 PM CST | Mesoscale Discussion | SPC | Archer, Baylor, Callahan, Clay, Eastland, Erath and 13 more | 87 min |
| Feb 10, 3:37 PM CST | Tornado Watch | SPC | Anderson, Bosque, Bowie, Camp, Cass, Cherokee and 42 more | 6 hr |
| Feb 10, 5:25 PM CST | Mesoscale Discussion | SPC | Anderson, Bosque, Bowie, Camp, Cass, Cherokee and 40 more | 65 min |
Nearby
Mesoscale Discussions in Texas, 2009Every mesoscale discussion in 2009
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.