Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 561

April 24, 200344 counties in Arkansas

The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2003, 12:47 PM CDT for 44 counties in Arkansas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Apr 24, 2003, 12:47 PM CDT (17:47 UTC)
Expired
Apr 24, 2003, 3:45 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center
All 44 counties

Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lafayette County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Monroe County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Union County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR

The radar

The Little Rock radar (KLZK), 46 km from the middle of the area, began a volume at 17:47 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

Little Rock, AR (KLZK), launched 12:00Z, 5.8 hours before the alert went out and 240 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, Little Rock, AR at 12:00Z on 2003-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 29 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, Little Rock, AR at 12:00Z on 2003-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 300 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
29 J/kg
Mixed-layer CIN
-291 J/kg
Mixed-layer LCL
788 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
300 m²/s²
0-3 km storm-relative helicity
346 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

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
Apr 23, 11:43 PM CDTMesoscale DiscussionSPCHoward, Lafayette, Little River, Miller, Polk, Sevier2 hr
Apr 24, 2:41 AM CDTMesoscale DiscussionSPCColumbia, Lafayette, Miller, Nevada, Ouachita2 hr
Apr 24, 10:12 AM CDTMesoscale DiscussionSPCArkansas, Cleburne, Conway, Craighead, Crittenden, Cross and 20 more2 hr
Apr 24, 1:00 PM CDTTornado WatchSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 25 more7 hr
Apr 24, 2:05 PM CDTTornado WatchSPCAshley, Chicot6 hr
Apr 24, 2:46 PM CDTMesoscale DiscussionSPCChicot119 min
Apr 24, 3:25 PM CDTTornado WatchSPCBaxter, Boone, Cleburne, Conway, Faulkner, Fulton and 19 more5 hr
Apr 24, 3:28 PM CDTMesoscale DiscussionSPCArkansas, Clark, Cleburne, Cleveland, Conway, Craighead and 32 more2 hr
Apr 24, 5:52 PM CDTMesoscale DiscussionSPCArkansas, Baxter, Boone, Clay, Cleburne, Cleveland and 36 more113 min
Apr 24, 6:35 PM CDTTornado WatchSPCArkansas, Baxter, Clay, Cleburne, Cleveland, Conway and 33 more5 hr
Apr 24, 6:49 PM CDTMesoscale DiscussionSPCChicot56 min

Nearby

Mesoscale Discussions in Arkansas, 2003Every mesoscale discussion in 2003

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.