Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 688

May 2, 200336 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 2, 2003, 4:28 PM CDT for 36 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 2, 2003, 4:28 PM CDT (21:28 UTC)
Expired
May 2, 2003, 6:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 36 counties

Anderson County, TX, Bell County, TX, Bosque County, TX, Cherokee County, TX, Coryell County, TX, Dallas County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Freestone County, TX, Gregg County, TX, Hamilton County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Houston County, TX, Johnson County, TX, Kaufman County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, Marion County, TX, McLennan County, TX, Milam County, TX, Nacogdoches County, TX, Navarro County, TX, Panola County, TX, Robertson County, TX, Rusk County, TX, Shelby County, TX, Smith County, TX, Somervell County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 84 km from the middle of the area, began a volume at 21:29 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, 9.5 hours before the alert went out and 107 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 2003-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1274 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 2003-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
1274 J/kg
Mixed-layer CIN
-175 J/kg
Mixed-layer LCL
718 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
-1.3

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
May 1, 7:25 PM CDTSevere Thunderstorm WatchSPCBell, Blanco, Bosque, Brown, Burnet, Comanche and 29 more5 hr
May 1, 9:00 PM CDTSevere Thunderstorm WatchSPCBowie, Cass, Morris, Titus4 hr
May 1, 10:10 PM CDTMesoscale DiscussionSPCAnderson, Bell, Blanco, Bosque, Brown, Burnet and 30 more95 min
May 1, 11:19 PM CDTMesoscale DiscussionSPCAustin, Brazoria, Brazos, Burleson, Colorado, Fort Bend and 14 more86 min
May 1, 11:20 PM CDTSevere Thunderstorm WatchSPCAustin, Brazoria, Chambers, Fort Bend, Galveston, Harris and 4 more4 hr
May 1, 11:53 PM CDTMesoscale DiscussionSPCBowie, Cass, Morris, Titus67 min
May 2, 2:21 PM CDTMesoscale DiscussionSPCAnderson, Angelina, Cherokee, Gregg, Hardin, Harrison and 15 more114 min
May 2, 2:25 PM CDTMesoscale DiscussionSPCBosque, Brown, Callahan, Coke, Coleman, Comanche and 21 more2 hr
May 2, 2:45 PM CDTTornado WatchSPCBrown, Callahan, Coke, Coleman, Concho, Crockett and 20 more6 hr
May 2, 4:45 PM CDTSevere Thunderstorm WatchSPCAnderson, Bell, Bosque, Brown, Burnet, Cass and 32 more5 hr
May 2, 5:57 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Comanche, Concho and 12 more2 hr

Nearby

Mesoscale Discussions in Texas, 2003Every mesoscale discussion in 2003

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.