Alert archive / Texas / Mesoscale Discussions in 2020
Mesoscale Discussion 645
The Storm Prediction Center issued this mesoscale discussion at May 20, 2020, 3:21 PM CDT for 53 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 2020, 3:21 PM CDT (20:21 UTC)
- Expired
- May 20, 2020, 5:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch likely
- Chance of a watch
- 95%
All 53 counties
Armstrong County, TX, Bailey County, TX, Borden County, TX, Briscoe County, TX, Callahan County, TX, Carson County, TX, Castro County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Cottle County, TX, Crosby County, TX, Dawson County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Floyd County, TX, Garza County, TX, Glasscock County, TX, Hale County, TX, Hall County, TX, Hartley County, TX, Haskell County, TX, Hockley County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Moore County, TX, Motley County, TX, Nolan County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Reagan County, TX, Runnels County, TX, Scurry County, TX, Shackelford County, TX, Sterling County, TX, Stonewall County, TX, Swisher County, TX, Taylor County, TX, Terry County, TX, Tom Green County, TX
The radar
The Lubbock radar (KLBB), 72 km from the middle of the area, began a volume at 20:25 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
Midland Regional, TX (KMAF), launched 12:00Z, 8.4 hours before the alert went out and 201 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
- 551 J/kg
- Mixed-layer CIN
- -315 J/kg
- Mixed-layer LCL
- 2077 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 20, 3:47 PM CDT | Severe Thunderstorm Watch | SPC | Armstrong, Bailey, Borden, Briscoe, Callahan, Castro and 58 more | 8 hr |
| May 20, 6:19 PM CDT | Mesoscale Discussion | SPC | Kinney, Maverick, Val Verde | 116 min |
Nearby
Mesoscale Discussions in Texas, 2020Every mesoscale discussion in 2020
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.