Alert archive / Arkansas / Mesoscale Discussions in 2015

Mesoscale Discussion 1048

June 17, 20159 counties in Arkansas; 4 counties in Oklahoma; Bowie County, Cass County, Marion County, Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 17, 2015, 12:08 PM CDT for 9 counties in Arkansas; 4 counties in Oklahoma; Bowie County, Cass County, Marion County, Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 17, 2015, 12:08 PM CDT (17:08 UTC)
Expired: Jun 17, 2015, 2:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sevier County, AR, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, Pushmataha County, OK, Bowie County, TX, Cass County, TX, Marion County, TX

The radar

The Western Arkansas radar (KSRX), 149 km from the middle of the area, began a volume at 17:09 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

Shreveport, LA (KBAD), launched 12:00Z, 5.1 hours before the alert went out and 178 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: 343 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 745 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 17, 5:31 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, McCurtain, Pushmataha	89 min
Jun 16, 10:50 PM CDT	Mesoscale Discussion	SPC	Anderson, Austin, Bastrop, Bell, Brazoria, Brazos and 47 more	85 min
Jun 16, 11:41 PM CDT	Tornado Watch	SPC	Austin, Brazoria, Brazos, Burleson, Colorado, Fayette and 15 more	7 hr
Jun 17, 3:01 AM CDT	Mesoscale Discussion	SPC	Austin, Brazoria, Brazos, Burleson, Colorado, Fort Bend and 11 more	119 min
Jun 17, 7:47 AM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Brazoria, Brazos, Burleson and 50 more	2 hr
Jun 17, 5:14 PM CDT	Mesoscale Discussion	SPC	Delta, Franklin, Hopkins, Hunt, Lamar, Rains and 4 more	2 hr

Nearby

Mesoscale Discussions in Arkansas, 2015 Mesoscale Discussions in Oklahoma, 2015 Mesoscale Discussions in Texas, 2015 Every mesoscale discussion in 2015

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.