Alert archive / Arkansas / Mesoscale Discussions in 2016
Mesoscale Discussion 574
The Storm Prediction Center issued this mesoscale discussion at May 9, 2016, 6:38 PM CDT for 19 counties in Arkansas; 12 counties in Missouri. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- May 9, 2016, 6:38 PM CDT (23:38 UTC)
- Expired
- May 9, 2016, 8:15 PM CDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 31 counties
Baxter County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Marion County, AR, Pope County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Yell County, AR, Bollinger County, MO, Butler County, MO, Carter County, MO, Dunklin County, MO, Howell County, MO, Madison County, MO, Oregon County, MO, Reynolds County, MO, Ripley County, MO, Shannon County, MO, Stoddard County, MO, Wayne County, MO
The radar
The Little Rock radar (KLZK), 146 km from the middle of the area, began a volume at 23:40 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
Shreveport, LA (KBAD), launched 12:00Z, 11.6 hours before the alert went out and 441 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
- 15 J/kg
- Mixed-layer CIN
- -201 J/kg
- Mixed-layer LCL
- 703 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 173 m²/s²
- 0-3 km storm-relative helicity
- 222 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 9, 1:39 PM CDT | Mesoscale Discussion | SPC | Howard, Little River, Montgomery, Polk, Scott, Sebastian and 1 more | 66 min |
| May 9, 2:36 PM CDT | Tornado Watch | SPC | Crawford, Hempstead, Howard, Little River, Miller, Montgomery and 5 more | 7 hr |
| May 9, 5:49 PM CDT | Mesoscale Discussion | SPC | Crawford, Hempstead, Howard, Little River, Montgomery, Pike and 4 more | 56 min |
| May 9, 1:46 PM CDT | Mesoscale Discussion | SPC | Atchison, Buchanan, Holt, Platte | 59 min |
| May 9, 4:52 PM CDT | Mesoscale Discussion | SPC | Atchison | 53 min |
| May 9, 5:13 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Holt, Nodaway | 6 hr |
Nearby
Mesoscale Discussions in Arkansas, 2016Mesoscale Discussions in Missouri, 2016Every mesoscale discussion in 2016
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.