Alert archive / Arkansas / Mesoscale Discussions in 2014

Mesoscale Discussion 885

June 7, 201412 counties in Arkansas

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2014, 6:32 PM CDT for 12 counties in Arkansas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Jun 7, 2014, 6:32 PM CDT (23:32 UTC)
Expired: Jun 7, 2014, 8:00 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center

Counties Arkansas County, AR, Grant County, AR, Hot Spring County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Monroe County, AR, Phillips County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR

The radar

The Little Rock radar (KLZK), 57 km from the middle of the area, began a volume at 23:33 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, 11.5 hours before the alert went out and 184 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1298 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 888 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!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 7, 1:54 AM CDT	Mesoscale Discussion	SPC	Benton, Crawford, Sebastian, Washington	2 hr
Jun 7, 12:25 PM CDT	Mesoscale Discussion	SPC	Baxter, Clay, Cleburne, Craighead, Fulton, Greene and 12 more	2 hr
Jun 7, 1:06 PM CDT	Mesoscale Discussion	SPC	Franklin, Logan, Montgomery, Polk, Scott, Sebastian and 1 more	2 hr
Jun 7, 2:44 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Cleburne, Conway, Craighead, Crittenden, Cross and 33 more	6 hr
Jun 7, 4:44 PM CDT	Tornado Watch	SPC	Craighead, Greene, Mississippi, Poinsett	7 hr

Nearby

Mesoscale Discussions in Arkansas, 2014 Every mesoscale discussion in 2014

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.