Alert archive / Texas / Mesoscale Discussions in 2006

Mesoscale Discussion 676

April 28, 20069 counties in Oklahoma; 14 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2006, 10:23 AM CDT for 9 counties in Oklahoma; 14 counties in Texas. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Apr 28, 2006, 10:23 AM CDT (15:23 UTC)
Expired
Apr 28, 2006, 12:00 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 23 counties

Beckham County, OK, Custer County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Roger Mills County, OK, Washita County, OK, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Donley County, TX, Foard County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, King County, TX, Lipscomb County, TX, Roberts County, TX, Wheeler County, TX, Wilbarger County, TX

The radar

The Amarillo radar (KAMA), 128 km from the middle of the area, began a volume at 15:23 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 3.4 hours before the alert went out and 127 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, Amarillo Airport, TX at 12:00Z on 2006-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 434 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, Amarillo Airport, TX at 12:00Z on 2006-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 230 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
434 J/kg
Mixed-layer CIN
-251 J/kg
Mixed-layer LCL
719 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
230 m²/s²
0-3 km storm-relative helicity
219 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 28, 7:03 AM CDTMesoscale DiscussionSPCBeaver, Cimarron, Harper, Texas117 min
Apr 28, 11:36 AM CDTTornado WatchSPCComanche, Cotton, Greer, Harmon, Jackson, Kiowa and 1 more9 hr
Apr 28, 1:04 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Jefferson and 5 more86 min
Apr 28, 6:07 PM CDTMesoscale DiscussionSPCCaddo, Carter, Comanche, Cotton, Garvin, Grady and 11 more53 min
Apr 28, 6:42 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Coal, Comanche, Cotton and 11 more7 hr
Apr 28, 10:43 AM CDTMesoscale DiscussionSPCBorden, Crosby, Dawson, Garza, Glasscock, Howard and 8 more92 min
Apr 28, 1:13 PM CDTMesoscale DiscussionSPCBandera, Crockett, Edwards, Gillespie, Kerr, Kimble and 10 more62 min
Apr 28, 1:20 PM CDTMesoscale DiscussionSPCBriscoe, Cottle, Dickens, Floyd, Foard, Hall and 7 more85 min
Apr 28, 1:28 PM CDTTornado WatchSPCBandera, Blanco, Crockett, Edwards, Gillespie, Kendall and 13 more6 hr
Apr 28, 3:38 PM CDTMesoscale DiscussionSPCChildress, Coke, Cottle, Dickens, Fisher, Foard and 17 more2 hr
Apr 28, 3:42 PM CDTMesoscale DiscussionSPCBandera, Crockett, Edwards, Gillespie, Kendall, Kerr and 11 more2 hr
Apr 28, 6:18 PM CDTMesoscale DiscussionSPCBell, Bosque, Brazos, Brown, Burnet, Callahan and 42 more87 min

Nearby

Mesoscale Discussions in Texas, 2006Mesoscale Discussions in Oklahoma, 2006Every mesoscale discussion in 2006

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.