Alert archive / Texas / Tornado Warnings in 1996

Tornado Warning 51, NWS Norman, OK

September 17, 1996Knox County, Texas

NWS Norman, OK issued this tornado warning at Sep 17, 1996, 10:42 PM CDT for Knox County, Texas. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 17, 1996, 10:42 PM CDT (03:42 UTC)
Expired: Sep 17, 1996, 11:15 PM CDT
In force: 33 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Knox County, TX

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 3.7 hours before the alert went out and 255 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2692 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 976 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 203 m²/s²
0-3 km storm-relative helicity: 297 m²/s²
Significant tornado parameter: 3.6
Supercell composite: 18.6

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this tornado warning went out at Sep 17, 9:15 PM CDT, 1 hour 27 minutes earlier.

Area forecast discussion, Sep 17, 9:15 PM CDT, 1 hour 27 minutes before

<!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>

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 18, 7:13 AM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Woodward	47 min
Sep 18, 12:50 AM CDT	Severe Thunderstorm Warning	OUN	Knox	40 min
Sep 18, 2:41 AM CDT	Severe Thunderstorm Warning	OUN	Baylor	49 min
Sep 18, 5:17 AM CDT	Severe Thunderstorm Warning	OUN	Knox	58 min
Sep 18, 5:24 AM CDT	Flash Flood Warning	OUN	Knox	3 hr
Sep 18, 6:42 AM CDT	Severe Thunderstorm Warning	OUN	Baylor	48 min

Nearby

Tornado Warnings in Texas, 1996 Every tornado warning in 1996 Tornadoes in 1996

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.