Alert archive / Arkansas / Mesoscale Discussions in 2008

Mesoscale Discussion 161

February 5, 200825 counties in Arkansas; 5 parishes in Louisiana

The Storm Prediction Center issued this mesoscale discussion at Feb 5, 2008, 3:36 PM CST for 25 counties in Arkansas; 5 parishes in Louisiana. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Feb 5, 2008, 3:36 PM CST (21:36 UTC)
Expired
Feb 5, 2008, 5:00 PM CST
In force
84 min
Issued by
the Storm Prediction Center
All 30 counties

Ashley County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Dallas County, AR, Drew County, AR, Faulkner County, AR, Grant County, AR, Hot Spring County, AR, Independence County, AR, Jefferson County, AR, Lincoln County, AR, Lonoke County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Union County, AR, White County, AR, Claiborne Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Union Parish, LA

The radar

The Little Rock radar (KLZK), 115 km from the middle of the area, began a volume at 21:36 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 (KSHV), launched 12:00Z, 9.6 hours before the alert went out and 191 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, Shreveport, LA at 12:00Z on 2008-02-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 544 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, Shreveport, LA at 12:00Z on 2008-02-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 279 square meters per square second.1939587897117Sfc1 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
544 J/kg
Mixed-layer CIN
-205 J/kg
Mixed-layer LCL
617 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
279 m²/s²
0-3 km storm-relative helicity
354 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

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
Feb 4, 9:21 PM CSTMesoscale DiscussionSPCClay, Fulton, Greene, Randolph, Sharp84 min
Feb 5, 6:39 AM CSTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 32 more3 hr
Feb 5, 9:47 AM CSTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Jackson and 5 more88 min
Feb 5, 10:18 AM CSTMesoscale DiscussionSPCBenton, Boone, Carroll, Crawford, Franklin, Johnson and 7 more87 min
Feb 5, 11:16 AM CSTMesoscale DiscussionSPCArkansas, Ashley, Baxter, Bradley, Calhoun, Clark and 53 more89 min
Feb 5, 11:56 AM CSTTornado WatchSPCHoward, Little River, Miller, Sevier7 hr
Feb 5, 12:11 PM CSTMesoscale DiscussionSPCArkansas, Ashley, Chicot, Crittenden, Cross, Desha and 7 more94 min
Feb 5, 12:39 PM CSTTornado WatchSPCBaxter, Benton, Boone, Carroll, Crawford, Franklin and 14 more7 hr
Feb 5, 2:08 PM CSTTornado Watch PDSSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 33 more10 hr
Feb 5, 3:09 PM CSTTornado Watch PDSSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more9 hr
Feb 5, 3:17 PM CSTMesoscale DiscussionSPCBaxter, Boone, Carroll, Crawford, Franklin, Johnson and 9 more88 min
Feb 5, 5:39 PM CSTMesoscale DiscussionSPCArkansas, Baxter, Bradley, Calhoun, Clark, Clay and 42 more96 min

Nearby

Mesoscale Discussions in Arkansas, 2008Mesoscale Discussions in Louisiana, 2008Every mesoscale discussion in 2008

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.