Alert archive / Arkansas / Mesoscale Discussions in 2011

Mesoscale Discussion 916

May 24, 201127 counties in Arkansas; 11 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 24, 2011, 2:08 AM CDT for 27 counties in Arkansas; 11 counties in Oklahoma. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
May 24, 2011, 2:08 AM CDT (07:08 UTC)
Expired
May 24, 2011, 3:45 AM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 38 counties

Arkansas County, AR, Clark County, AR, Cleveland County, AR, Crawford County, AR, Dallas County, AR, Franklin County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Howard County, AR, Jefferson County, AR, Lincoln County, AR, Logan County, AR, Lonoke County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Sebastian County, AR, Woodruff County, AR, Yell County, AR, Cherokee County, OK, Creek County, OK, Haskell County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Okmulgee County, OK, Pawnee County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Western Arkansas radar (KSRX), 96 km from the middle of the area, began a volume at 07:08 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

Springfield, MO (KSGF), launched 00:00Z, 7.1 hours before the alert went out and 207 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-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2011-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2011-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -138 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
23 J/kg
Mixed-layer CIN
-417 J/kg
Mixed-layer LCL
1542 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-138 m²/s²
0-3 km storm-relative helicity
-19 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.

IssuedProductOfficeCountiesLasted
May 23, 8:55 PM CDTMesoscale DiscussionSPCConway, Faulkner, Garland, Johnson, Logan, Lonoke and 10 more95 min
May 23, 9:42 PM CDTSevere Thunderstorm WatchSPCArkansas, Cleburne, Conway, Crawford, Faulkner, Franklin and 21 more6 hr
May 23, 7:50 PM CDTMesoscale DiscussionSPCComanche, Cotton, Jackson, Jefferson, Stephens, Tillman55 min
May 23, 9:22 PM CDTMesoscale DiscussionSPCAdair, Blaine, Canadian, Cherokee, Creek, Haskell and 15 more23 min
May 24, 12:18 PM CDTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Carter, Cleveland, Comanche and 21 more87 min
May 24, 12:47 PM CDTTornado Watch PDSSPCAlfalfa, Atoka, Blaine, Bryan, Caddo, Canadian and 51 more11 hr
May 24, 2:35 PM CDTMesoscale DiscussionSPCAlfalfa, Grant, Kay, Woods85 min
May 24, 4:48 PM CDTMesoscale DiscussionSPCCaddo, Canadian, Carter, Cleveland, Cotton, Creek and 21 more87 min
May 24, 6:43 PM CDTMesoscale DiscussionSPCBryan, Carter, Cleveland, Coal, Creek, Garvin and 17 more62 min

Nearby

Mesoscale Discussions in Arkansas, 2011Mesoscale Discussions in Oklahoma, 2011Every mesoscale discussion in 2011

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.