Alert archive / Texas / Mesoscale Discussions in 2017
Mesoscale Discussion 684
The Storm Prediction Center issued this mesoscale discussion at May 10, 2017, 2:14 PM CDT for 14 counties in Oklahoma; 16 counties in Texas. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- May 10, 2017, 2:14 PM CDT (19:14 UTC)
- Expired
- May 10, 2017, 3:15 PM CDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 30 counties
Beckham County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Baylor County, TX, Briscoe County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Hall County, TX, Hardeman County, TX, King County, TX, Knox County, TX, Motley County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 51 km from the middle of the area, began a volume at 19:17 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
Norman, OK (KOUN), launched 12:00Z, 7.2 hours before the alert went out and 191 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
- 614 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 611 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.4
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 |
|---|---|---|---|---|
| May 9, 10:59 PM CDT | Severe Thunderstorm Watch | SPC | Beaver | 8 hr |
| May 10, 6:04 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Custer, Dewey, Ellis, Grant and 5 more | 116 min |
| May 10, 2:43 PM CDT | Tornado Watch | SPC | Caddo, Comanche, Cotton, Grady, Greer, Harmon and 5 more | 7 hr |
| May 10, 3:11 PM CDT | Mesoscale Discussion | SPC | Beaver, Texas | 94 min |
| May 10, 3:37 PM CDT | Mesoscale Discussion | SPC | Craig, Grant, Kay, Noble, Nowata, Osage and 3 more | 113 min |
| May 10, 5:27 PM CDT | Severe Thunderstorm Watch | SPC | Beaver, Texas | 3 hr |
| May 10, 5:58 PM CDT | Mesoscale Discussion | SPC | Beckham, Caddo, Comanche, Cotton, Grady, Greer and 5 more | 2 hr |
| May 9, 8:41 PM CDT | Mesoscale Discussion | SPC | Andrews, Bailey, Castro, Cochran, Deaf Smith, Ector and 10 more | 2 hr |
| May 9, 10:17 PM CDT | Mesoscale Discussion | SPC | Andrews, Armstrong, Bailey, Briscoe, Carson, Castro and 19 more | 28 min |
| May 10, 2:04 AM CDT | Mesoscale Discussion | SPC | Andrews, Armstrong, Bailey, Briscoe, Castro, Cochran and 21 more | 86 min |
| May 10, 2:25 PM CDT | Mesoscale Discussion | SPC | Menard, Schleicher, Sutton, Val Verde | 3 hr |
Nearby
Mesoscale Discussions in Texas, 2017Mesoscale Discussions in Oklahoma, 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.