Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 106, NWS Shreveport, LA

March 7, 1998Ouachita Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 7, 1998, 12:54 AM CST for Ouachita Parish, Louisiana. It was in force for 51 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: Mar 7, 1998, 12:54 AM CST (06:54 UTC)
Expired: Mar 7, 1998, 1:45 AM CST
In force: 51 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Ouachita Parish, LA

The radar

The Shreveport radar (KSHV), 158 km from the middle of the area, began a volume at 06:50 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
Mar 7, 1:15 AM CST	Hail 0.75	Monroe, LA

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

Jackson, MS (KJAN), launched 00:00Z, 6.9 hours before the alert went out and 196 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: 401 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 590 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

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 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 Mar 6, 10:41 PM CST, 2 hours 13 minutes earlier.

Area forecast discussion, Mar 6, 10:41 PM CST, 2 hours 13 minutes before

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In the hours before

Local storm report, Mar 6, 7:39 PM CST, 5 hours 15 minutes before

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Local storm report, Mar 6, 7:39 PM CST, 5 hours 15 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.
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      <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
Mar 6, 10:34 PM CST	Severe Thunderstorm Warning	SHV	San Augustine	31 min
Mar 7, 3:08 AM CST	Severe Thunderstorm Warning	SHV	Wood	32 min
Mar 7, 4:23 AM CST	Severe Thunderstorm Warning	SHV	Cass	47 min
Mar 7, 5:14 AM CST	Severe Thunderstorm Warning	SHV	Franklin	46 min
Mar 7, 7:48 AM CST	Severe Thunderstorm Warning	SHV	Angelina	47 min
Mar 7, 8:20 AM CST	Tornado Warning	SHV	Angelina	50 min
Mar 7, 8:44 AM CST	Severe Thunderstorm Warning	SHV	Sabine, San Augustine	46 min
Mar 7, 10:11 AM CST	Severe Thunderstorm Warning	SHV	Shelby	49 min
Mar 7, 1:43 PM CST	Severe Thunderstorm Warning	SHV	Marion	37 min
Mar 6, 6:56 PM CST	Severe Thunderstorm Warning	SHV	Natchitoches	49 min
Mar 7, 5:28 AM CST	Severe Thunderstorm Warning	SHV	LaSalle	62 min
Mar 7, 7:00 AM CST	Severe Thunderstorm Warning	SHV	Grant	50 min
Mar 7, 7:07 AM CST	Severe Thunderstorm Warning	SHV	LaSalle	48 min
Mar 7, 7:40 AM CST	Severe Thunderstorm Warning	SHV	Winn	35 min
Mar 7, 7:52 AM CST	Severe Thunderstorm Warning	SHV	Jackson	48 min
Mar 7, 8:47 AM CST	Severe Thunderstorm Warning	SHV	Bienville	63 min
Mar 7, 9:07 AM CST	Severe Thunderstorm Warning	SHV	Sabine	63 min
Mar 7, 9:45 AM CST	Severe Thunderstorm Warning	SHV	De Soto	50 min
Mar 7, 10:52 AM CST	Severe Thunderstorm Warning	SHV	Claiborne, Union	33 min
Mar 7, 11:17 AM CST	Severe Thunderstorm Warning	SHV	LaSalle	33 min
Mar 7, 5:46 PM CST	Severe Thunderstorm Warning	SHV	Sabine	49 min
Mar 7, 8:28 AM CST	Severe Thunderstorm Warning	SHV	Howard	32 min
Mar 7, 11:02 AM CST	Severe Thunderstorm Warning	SHV	Union	48 min
Mar 7, 11:33 AM CST	Severe Thunderstorm Warning	SHV	Little River, Sevier	62 min
Mar 7, 12:23 PM CST	Severe Thunderstorm Warning	SHV	Hempstead	32 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1998 Every severe thunderstorm warning in 1998

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.