Alert archive / Texas / Mesoscale Discussions in 2019
Mesoscale Discussion 535
The Storm Prediction Center issued this mesoscale discussion at May 4, 2019, 2:31 PM MDT for 5 states. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- May 4, 2019, 2:31 PM MDT (20:31 UTC)
- Expired
- May 4, 2019, 4:30 PM MDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 31 counties
Baca County, CO, Prowers County, CO, Grant County, KS, Hamilton County, KS, Kearny County, KS, Morton County, KS, Stanton County, KS, Stevens County, KS, Chaves County, NM, Curry County, NM, De Baca County, NM, Guadalupe County, NM, Harding County, NM, Quay County, NM, Roosevelt County, NM, San Miguel County, NM, Union County, NM, Cimarron County, OK, Texas County, OK, Bailey County, TX, Castro County, TX, Cochran County, TX, Dallam County, TX, Deaf Smith County, TX, Hansford County, TX, Hartley County, TX, Moore County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Sherman County, TX
The radar
The Cannon AFB radar (KFDX), 45 km from the middle of the area, began a volume at 20:34 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 8.5 hours before the alert went out and 156 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 873 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 34 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 4, 12:58 PM MDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Rawlins | 2 hr |
| May 3, 7:32 PM MDT | Mesoscale Discussion | SPC | Austin, Bee, Calhoun, Colorado, Duval, Fort Bend and 9 more | 58 min |
| May 3, 7:58 PM MDT | Severe Thunderstorm Watch | SPC | Aransas, Austin, Bee, Brazoria, Brazos, Burleson and 26 more | 7 hr |
| May 3, 10:35 PM MDT | Mesoscale Discussion | SPC | Aransas, Brazoria, Calhoun, Duval, Fort Bend, Harris and 7 more | 85 min |
| May 4, 1:13 AM MDT | Mesoscale Discussion | SPC | Hardin, Jefferson, Newton, Orange | 62 min |
| May 4, 2:00 AM MDT | Severe Thunderstorm Watch | SPC | Hardin, Jasper, Jefferson, Newton, Orange | 7 hr |
| May 4, 1:25 PM MDT | Mesoscale Discussion | SPC | Brewster, Pecos, Reeves | 3 hr |
Nearby
Mesoscale Discussions in Texas, 2019Mesoscale Discussions in New Mexico, 2019Mesoscale Discussions in Kansas, 2019Every mesoscale discussion in 2019
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.