Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 49, NWS Shreveport, LA

January 29, 1999Smith County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Jan 29, 1999, 7:23 PM CST for Smith County, Texas. It was in force for 62 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jan 29, 1999, 7:23 PM CST (01:23 UTC)
Expired: Jan 29, 1999, 8:25 PM CST
In force: 62 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Smith County, TX

The radar

The Shreveport radar (KSHV), 134 km from the middle of the area, began a volume at 01:24 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.

What was reported inside it

Time	Report	Where	Remark
Jan 29, 7:35 PM CST	Hail 0.75	Tyler, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 1.4 hours before the alert went out and 319 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: 1341 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 535 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 184 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 5.8

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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jan 29, 3:15 PM CST, 4 hours 8 minutes earlier.

Area forecast discussion, Jan 29, 3:15 PM CST, 4 hours 8 minutes before

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In the hours before

Local storm report, Jan 29, 5:01 PM CST, 2 hours 22 minutes before

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<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.
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The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 29, 8:05 PM CST	Severe Thunderstorm Warning	SHV	Cherokee	30 min
Jan 29, 8:27 PM CST	Severe Thunderstorm Warning	SHV	Smith	48 min
Jan 29, 8:35 PM CST	Severe Thunderstorm Warning	SHV	Gregg	65 min
Jan 29, 9:12 PM CST	Flash Flood Warning	SHV	Gregg, Smith	4 hr
Jan 29, 11:29 PM CST	Flash Flood Warning	SHV	Bowie, Cass	4 hr
Jan 29, 11:29 PM CST	Flash Flood Warning	SHV	Marion	4 hr
Jan 30, 5:07 AM CST	Severe Thunderstorm Warning	SHV	Panola	48 min
Jan 29, 9:34 PM CST	Flash Flood Warning	SHV	Bienville, Red River	4 hr
Jan 30, 6:00 AM CST	Severe Thunderstorm Warning	SHV	Bossier	45 min

Nearby

Severe Thunderstorm Warnings in Texas, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.