Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 69

January 29, 2013Love County, Oklahoma; 36 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jan 29, 2013, 10:37 AM CST for Love County, Oklahoma; 36 counties in Texas. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued
Jan 29, 2013, 10:37 AM CST (16:37 UTC)
Expired
Jan 29, 2013, 11:30 AM CST
In force
53 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 37 counties

Love County, OK, Bosque County, TX, Brown County, TX, Coleman County, TX, Collin County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Grayson County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mills County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, San Saba County, TX, Schleicher County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Wise County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 99 km from the middle of the area, began a volume at 16:40 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

Fort Worth, TX (KFWD), launched 12:00Z, 4.6 hours before the alert went out and 124 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, Fort Worth, TX at 12:00Z on 2013-01-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 965 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, Fort Worth, TX at 12:00Z on 2013-01-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 401 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
965 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
544 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
401 m²/s²
0-3 km storm-relative helicity
413 m²/s²
Significant tornado parameter
2.4
Supercell composite
10.6

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
Jan 28, 9:29 PM CSTMesoscale DiscussionSPCCleveland, Creek, Lincoln, Logan, Noble, Oklahoma and 4 more2 hr
Jan 29, 3:28 AM CSTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 16 more92 min
Jan 29, 4:57 AM CSTTornado WatchSPCAlfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 27 more7 hr
Jan 29, 7:26 AM CSTTornado WatchSPCAdair, Cherokee, Craig, Delaware, McIntosh, Mayes and 10 more10 hr
Jan 29, 9:46 AM CSTMesoscale DiscussionSPCAdair, Atoka, Bryan, Carter, Choctaw, Coal and 20 more119 min
Jan 29, 10:59 AM CSTTornado WatchSPCAtoka, Bryan, Carter, Choctaw, Coal, Haskell and 13 more8 hr
Jan 29, 11:05 AM CSTMesoscale DiscussionSPCAdair, Cherokee, Craig, Delaware, Mayes, Muskogee and 7 more55 min
Jan 29, 1:19 PM CSTMesoscale DiscussionSPCAdair, Cherokee, Delaware, Muskogee, Sequoyah, Wagoner56 min
Jan 29, 2:15 PM CSTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Haskell, Latimer and 5 more2 hr
Jan 29, 3:31 PM CSTMesoscale DiscussionSPCAdair, Sequoyah89 min
Jan 29, 4:58 PM CSTMesoscale DiscussionSPCMcCurtain92 min
Jan 29, 5:37 PM CSTTornado WatchSPCMcCurtain8 hr
Jan 29, 11:28 AM CSTSevere Thunderstorm WatchSPCBosque, Brown, Callahan, Coleman, Comanche, Concho and 30 more6 hr
Jan 29, 3:46 PM CSTMesoscale DiscussionSPCCoryell, Dallas, Ellis, Hill, McLennan119 min
Jan 29, 5:51 PM CSTMesoscale DiscussionSPCAnderson, Angelina, Brazos, Burleson, Camp, Cass and 25 more114 min

Nearby

Mesoscale Discussions in Texas, 2013Mesoscale Discussions in Oklahoma, 2013Every mesoscale discussion in 2013

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.