Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 625

April 29, 201235 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2012, 10:04 PM CDT for 35 counties in Texas. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued
Apr 29, 2012, 10:04 PM CDT (03:04 UTC)
Expired
Apr 29, 2012, 11:30 PM CDT
In force
86 min
Issued by
the Storm Prediction Center
All 35 counties

Armstrong County, TX, Borden County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hemphill County, TX, Hockley County, TX, Hutchinson County, TX, Kent County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Moore County, TX, Motley County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Scurry County, TX, Swisher County, TX, Terry County, TX, Wheeler County, TX, Yoakum County, TX

The radar

The Lubbock radar (KLBB), 44 km from the middle of the area, began a volume at 03:05 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 00:00Z, 3.1 hours before the alert went out and 176 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 00:00Z on 2012-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 63 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 00:00Z on 2012-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 108 square meters per square second.1939587897Sfc1 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
63 J/kg
Mixed-layer CIN
-116 J/kg
Mixed-layer LCL
2070 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
108 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 29, 7:23 PM CDTSevere Thunderstorm WatchSPCAndrews, Bailey, Borden, Briscoe, Castro, Cochran and 14 more4 hr
Apr 29, 7:33 PM CDTMesoscale DiscussionSPCCarson, Dallam, Gray, Hansford, Hartley, Hemphill and 8 more87 min
Apr 29, 8:55 PM CDTSevere Thunderstorm WatchSPCArmstrong, Carson, Collingsworth, Donley, Gray, Hemphill and 6 more6 hr
Apr 29, 10:31 PM CDTMesoscale DiscussionSPCDallam, Hansford, Lipscomb, Ochiltree, Sherman119 min
Apr 29, 10:50 PM CDTSevere Thunderstorm WatchSPCBailey, Borden, Castro, Cochran, Dawson, Garza and 11 more4 hr
Apr 30, 12:38 AM CDTMesoscale DiscussionSPCArmstrong, Carson, Collingsworth, Donley, Gray, Hansford and 9 more37 min
Apr 30, 2:15 AM CDTMesoscale DiscussionSPCBriscoe, Castro, Crosby, Dickens, Floyd, Garza and 5 more30 min
Apr 30, 2:08 PM CDTMesoscale DiscussionSPCCrane, Ector, Midland, Pecos, Terrell, Upton97 min
Apr 30, 2:39 PM CDTSevere Thunderstorm WatchSPCBorden, Brewster, Crane, Dawson, Ector, Howard and 12 more7 hr
Apr 30, 2:58 PM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Carson, Castro, Cochran and 21 more62 min
Apr 30, 3:36 PM CDTSevere Thunderstorm WatchSPCArmstrong, Bailey, Briscoe, Carson, Castro, Childress and 35 more7 hr
Apr 30, 5:19 PM CDTMesoscale DiscussionSPCGray, Hemphill, Lipscomb, Ochiltree, Roberts, Wheeler56 min
Apr 30, 5:42 PM CDTTornado WatchSPCArmstrong, Briscoe, Carson, Childress, Collingsworth, Donley and 12 more7 hr
Apr 30, 6:11 PM CDTMesoscale DiscussionSPCBaylor, Borden, Callahan, Coke, Coleman, Concho and 48 more2 hr
Apr 30, 6:54 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Callahan, Coke, Coleman, Concho and 33 more6 hr

Nearby

Mesoscale Discussions in Texas, 2012Every mesoscale discussion in 2012

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.