Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 271, NWS Shreveport, LA

June 5, 1998Grant Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Jun 5, 1998, 6:57 PM CDT for Grant Parish, Louisiana. It was in force for 63 min. 5 reports 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
Jun 5, 1998, 6:57 PM CDT (23:57 UTC)
Expired
Jun 5, 1998, 8:00 PM CDT
In force
63 min
Issued by
NWS Shreveport, LA
Area
Whole counties

County Grant Parish, LA

The radar

The Ft Polk radar (KPOE), 63 km from the middle of the area, began a volume at 23:57 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

TimeReportWhereRemark
Jun 5, 7:17 PM CDTThunderstorm Wind 52Williana, LA
Jun 5, 7:25 PM CDTThunderstorm Wind 57Montgomery, LATrees down across Hwy 122.
Jun 5, 7:31 PM CDTThunderstorm Wind 52Dry Prong, LA
Jun 5, 7:31 PM CDTThunderstorm Wind 61Dry Prong, LANumerous trees down.
Jun 5, 7:49 PM CDTThunderstorm Wind 52Williana, LATrees down along Hwy 165.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 5, 6:15 PM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 12.0 hours before the alert went out and 149 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, Shreveport, LA at 12:00Z on 1998-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1882 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, Shreveport, LA at 12:00Z on 1998-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 295 square meters per square second.19395878Sfc1 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
1882 J/kg
Mixed-layer CIN
-196 J/kg
Mixed-layer LCL
661 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
295 m²/s²
0-3 km storm-relative helicity
259 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.4

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 Jun 5, 3:45 PM CDT, 3 hours 12 minutes earlier.

Area forecast discussion, Jun 5, 3:45 PM CDT, 3 hours 12 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>

In the hours before

Local storm report, Jun 5, 2:24 PM CDT, 4 hours 33 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>
Local storm report, Jun 5, 2:24 PM CDT, 4 hours 33 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 Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 4, 9:28 PM CDTSevere Thunderstorm WarningSHVRed River62 min
Jun 4, 10:00 PM CDTSevere Thunderstorm WarningSHVCamp, Franklin, Wood60 min
Jun 4, 10:00 PM CDTSevere Thunderstorm WarningSHVTitus60 min
Jun 4, 10:08 PM CDTSevere Thunderstorm WarningSHVBowie62 min
Jun 4, 10:17 PM CDTSevere Thunderstorm WarningSHVMorris48 min
Jun 4, 10:34 PM CDTTornado WarningSHVWood61 min
Jun 4, 10:48 PM CDTSevere Thunderstorm WarningSHVSmith, Upshur67 min
Jun 4, 11:03 PM CDTSevere Thunderstorm WarningSHVCass, Harrison, Marion, Morris32 min
Jun 4, 11:03 PM CDTSevere Thunderstorm WarningSHVGregg32 min
Jun 4, 11:33 PM CDTSevere Thunderstorm WarningSHVGregg, Harrison62 min
Jun 4, 11:33 PM CDTSevere Thunderstorm WarningSHVCass, Marion62 min
Jun 4, 11:57 PM CDTSevere Thunderstorm WarningSHVRusk58 min
Jun 5, 12:28 AM CDTSevere Thunderstorm WarningSHVPanola47 min
Jun 5, 6:59 AM CDTSevere Thunderstorm WarningSHVCamp31 min
Jun 5, 7:42 AM CDTSevere Thunderstorm WarningSHVRusk48 min
Jun 5, 7:48 AM CDTSevere Thunderstorm WarningSHVGregg32 min
Jun 5, 7:57 AM CDTSevere Thunderstorm WarningSHVHarrison, Panola63 min
Jun 5, 1:58 PM CDTSevere Thunderstorm WarningSHVSan Augustine47 min
Jun 5, 4:43 PM CDTSevere Thunderstorm WarningSHVAngelina47 min
Jun 5, 5:09 PM CDTSevere Thunderstorm WarningSHVNacogdoches46 min
Jun 5, 5:35 PM CDTSevere Thunderstorm WarningSHVSan Augustine55 min
Jun 5, 5:59 PM CDTSevere Thunderstorm WarningSHVSabine61 min
Jun 4, 11:45 PM CDTSevere Thunderstorm WarningSHVBossier, Caddo60 min
Jun 5, 12:20 AM CDTSevere Thunderstorm WarningSHVWebster60 min
Jun 5, 12:40 AM CDTSevere Thunderstorm WarningSHVBossier, Caddo45 min
Jun 5, 12:49 AM CDTSevere Thunderstorm WarningSHVClaiborne61 min
Jun 5, 8:29 AM CDTSevere Thunderstorm WarningSHVCaddo46 min
Jun 5, 8:45 AM CDTSevere Thunderstorm WarningSHVDe Soto45 min
Jun 5, 8:45 AM CDTSevere Thunderstorm WarningSHVBossier45 min
Jun 5, 9:06 AM CDTSevere Thunderstorm WarningSHVWebster44 min
Jun 5, 9:11 AM CDTSevere Thunderstorm WarningSHVBienville, Red River49 min
Jun 5, 9:24 AM CDTSevere Thunderstorm WarningSHVClaiborne51 min
Jun 5, 9:28 AM CDTSevere Thunderstorm WarningSHVNatchitoches47 min
Jun 5, 9:54 AM CDTSevere Thunderstorm WarningSHVJackson, Winn46 min
Jun 5, 9:54 AM CDTSevere Thunderstorm WarningSHVLincoln46 min
Jun 5, 10:20 AM CDTSevere Thunderstorm WarningSHVOuachita, Union60 min
Jun 5, 10:20 AM CDTSevere Thunderstorm WarningSHVCaldwell60 min
Jun 5, 10:48 AM CDTSevere Thunderstorm WarningSHVLaSalle47 min
Jun 5, 6:08 PM CDTSevere Thunderstorm WarningSHVSabine62 min
Jun 5, 6:36 PM CDTSevere Thunderstorm WarningSHVNatchitoches64 min
Jun 4, 9:54 PM CDTSevere Thunderstorm WarningSHVHoward, Sevier61 min
Jun 4, 11:05 PM CDTSevere Thunderstorm WarningSHVHempstead, Miller65 min
Jun 4, 11:28 PM CDTSevere Thunderstorm WarningSHVLafayette, Nevada62 min
Jun 5, 12:03 AM CDTSevere Thunderstorm WarningSHVColumbia47 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1998Every 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.