Alert archive / Mississippi / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 498, NWS Jackson, MS

July 12, 1998Warren County, Mississippi; Madison Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at Jul 12, 1998, 4:08 PM CDT for Warren County, Mississippi; Madison Parish, Louisiana. It was in force for 47 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: Jul 12, 1998, 4:08 PM CDT (21:08 UTC)
Expired: Jul 12, 1998, 4:55 PM CDT
In force: 47 min
Issued by: NWS Jackson, MS
Area: Whole counties

Counties Madison Parish, LA, Warren County, MS

What was reported inside it

Time	Report	Where	Remark
Jul 12, 4:45 PM CDT	Thunderstorm Wind	Vicksburg, MS	Numerous trees were blown down.

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 12:00Z, 9.1 hours before the alert went out and 91 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: 173 J/kg
Mixed-layer CIN: -212 J/kg
Mixed-layer LCL: 1001 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

In the hours before

Special weather statement, Jul 12, 10:25 AM CDT, 5 hours 43 minutes before

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Special weather statement, Jul 12, 10:25 AM CDT, 5 hours 43 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.
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The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 11, 7:28 PM CDT	Severe Thunderstorm Warning	JAN	Washington	32 min
Jul 11, 7:46 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena	34 min
Jul 12, 4:35 PM CDT	Severe Thunderstorm Warning	JAN	Hinds	35 min
Jul 12, 4:46 PM CDT	Severe Thunderstorm Warning	JAN	Rankin, Scott	49 min
Jul 12, 5:26 PM CDT	Severe Thunderstorm Warning	JAN	Smith	49 min
Jul 12, 5:35 PM CDT	Severe Thunderstorm Warning	JAN	Hinds	35 min
Jul 12, 6:05 PM CDT	Severe Thunderstorm Warning	JAN	Hinds	35 min
Jul 12, 6:26 PM CDT	Flash Flood Warning	JAN	Hinds	2 hr
Jul 11, 8:07 PM CDT	Severe Thunderstorm Warning	JAN	East Carroll	33 min
Jul 11, 8:15 PM CDT	Severe Thunderstorm Warning	JAN	Morehouse	50 min
Jul 12, 3:02 PM CDT	Severe Thunderstorm Warning	JAN	Franklin	48 min
Jul 12, 4:02 PM CDT	Severe Thunderstorm Warning	JAN	Tensas	33 min
Jul 12, 4:49 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Richland	36 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1998 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.