Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 2075

December 26, 201517 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Dec 26, 2015, 11:48 PM CST for 17 counties in Texas. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Dec 26, 2015, 11:48 PM CST (05:48 UTC)
Expired
Dec 27, 2015, 1:15 AM CST
In force
87 min
Issued by
the Storm Prediction Center

Counties Concho County, TX, Edwards County, TX, Gillespie County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Real County, TX, San Saba County, TX, Schleicher County, TX, Sutton County, TX, Tom Green County, TX, Uvalde County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 109 km from the middle of the area, began a volume at 05:49 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

Del Rio, TX (KDLF), launched 00:00Z, 5.8 hours before the alert went out and 130 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, Del Rio, TX at 00:00Z on 2015-12-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 689 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, Del Rio, TX at 00:00Z on 2015-12-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 346 square meters per square second.1939587897117136Sfc1 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
689 J/kg
Mixed-layer CIN
-183 J/kg
Mixed-layer LCL
1529 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
346 m²/s²
0-3 km storm-relative helicity
473 m²/s²
Significant tornado parameter
0.1
Supercell composite
4.8

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
Dec 26, 7:32 PM CSTMesoscale DiscussionSPCBosque, Collin, Coryell, Dallas, Delta, Denton and 25 more88 min
Dec 26, 8:09 PM CSTMesoscale DiscussionSPCBorden, Callahan, Coke, Coleman, Concho, Crockett and 21 more2 hr
Dec 26, 8:58 PM CSTSevere Thunderstorm WatchSPCBandera, Crockett, Edwards, Gillespie, Kerr, Kimble and 11 more7 hr
Dec 26, 11:21 PM CSTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Carson, Castro, Cochran and 17 more5 hr
Dec 26, 11:27 PM CSTMesoscale DiscussionSPCLamar, Red River2 hr
Dec 27, 3:38 AM CSTMesoscale DiscussionSPCHardeman6 hr
Dec 27, 4:36 AM CSTMesoscale DiscussionSPCCarson, Dallam, Deaf Smith, Gray, Hansford, Hartley and 11 more6 hr
Dec 27, 5:15 AM CSTMesoscale DiscussionSPCAndrews, Cochran, Crane, Culberson, Ector, Gaines and 10 more5 hr
Dec 27, 5:44 AM CSTMesoscale DiscussionSPCAnderson, Angelina, Austin, Bastrop, Bowie, Brazos and 44 more3 hr
Dec 27, 8:56 AM CSTTornado WatchSPCAnderson, Angelina, Austin, Bowie, Brazos, Burleson and 42 more10 hr
Dec 27, 9:50 AM CSTMesoscale DiscussionSPCBaylor, Childress, Coke, Cottle, Crockett, Dickens and 25 more6 hr
Dec 27, 11:24 AM CSTMesoscale DiscussionSPCAndrews, Bailey, Borden, Castro, Cochran, Crane and 24 more6 hr
Dec 27, 12:04 PM CSTMesoscale DiscussionSPCArcher, Bosque, Clay, Collin, Comanche, Cooke and 24 more2 hr
Dec 27, 12:45 PM CSTMesoscale DiscussionSPCAnderson, Angelina, Austin, Bowie, Brazos, Burleson and 42 more2 hr
Dec 27, 2:27 PM CSTMesoscale DiscussionSPCBowie, Cass, Harrison, Jasper, Jefferson, Marion and 8 more63 min
Dec 27, 2:47 PM CSTTornado WatchSPCAngelina, Bowie, Camp, Cass, Cherokee, Franklin and 18 more7 hr
Dec 27, 3:19 PM CSTMesoscale DiscussionSPCBrazoria, Chambers, Fort Bend, Galveston, Harris, Houston and 7 more116 min
Dec 27, 3:55 PM CSTMesoscale DiscussionSPCArcher, Baylor, Callahan, Childress, Coke, Coleman and 31 more4 hr
Dec 27, 4:55 PM CSTMesoscale DiscussionSPCCass, Harrison, Marion, Nacogdoches, Panola, Rusk and 3 more2 hr

Nearby

Mesoscale Discussions in Texas, 2015Every mesoscale discussion in 2015

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.