Alert archive / Arkansas / Mesoscale Discussions in 2017
Mesoscale Discussion 1085
The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2017, 12:36 PM CDT for 26 counties in Arkansas. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Jun 18, 2017, 12:36 PM CDT (17:36 UTC)
- Expired
- Jun 18, 2017, 2:30 PM CDT
- In force
- 114 min
- Issued by
- the Storm Prediction Center
All 26 counties
Arkansas County, AR, Cleburne County, AR, Cleveland County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Faulkner County, AR, Grant County, AR, Independence County, AR, Jackson County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, St. Francis County, AR, Stone County, AR, White County, AR, Woodruff County, AR
The radar
The Little Rock radar (KLZK), 87 km from the middle of the area, began a volume at 17:37 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
Little Rock, AR (KBYH), launched 12:00Z, 5.6 hours before the alert went out and 133 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
- 2261 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 859 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
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 |
|---|---|---|---|---|
| Jun 18, 4:14 AM CDT | Severe Thunderstorm Watch | SPC | Crawford, Franklin, Madison, Sebastian, Washington | 6 hr |
| Jun 18, 8:05 AM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Cleburne, Conway, Crawford, Faulkner and 30 more | 115 min |
| Jun 18, 9:43 AM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Clark, Cleburne, Cleveland, Conway, Craighead and 37 more | 6 hr |
| Jun 18, 1:48 PM CDT | Mesoscale Discussion | SPC | Crittenden, Cross, Lee, Mississippi, Monroe, Phillips and 3 more | 117 min |
Nearby
Mesoscale Discussions in Arkansas, 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.