Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 613, NWS Jackson, MS

September 8, 1999Kemper County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Sep 8, 1999, 4:04 PM CDT for Kemper County, Mississippi. It was in force for 31 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 8, 1999, 4:04 PM CDT (21:04 UTC)
Expired: Sep 8, 1999, 4:35 PM CDT
In force: 31 min
Issued by: NWS Jackson, MS
Area: Whole counties

County Kemper County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.1 hours before the alert went out and 143 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: 1096 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 1020 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 4 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, Sep 8, 10:30 AM CDT, 5 hours 34 minutes before

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
090400-

AREA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
1030 AM CDT WED SEP 8 1999

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHEAST
ARKANSAS...NORTHEAST LOUISIANA AND WEST MISSISSIPPI TODAY. AN UPPER
LEVEL DISTURBANCE WILL APPROACH THE AREA FROM THE WEST. THE AIRMASS
OVER THE REGION IS VERY MOST AND UNSTABLE. AS A RESULT A FEW OF THE
STORMS MAY BECOME SEVERE THROUGH THIS EVENING. THE MAIN THREAT FROM
THESE STORMS WILL BE STRONG TO DAMAGING WINDS AND SOME HAIL.
SCATTERED THUNDERSTORMS ARE ALSO EXPECTED ACROSS THE EASTERN HALF OF
MISSISSIPPI TODAY...HEAVY RAINFALL AND GUSTY WINDS CAN BE EXPECTED
WITH THOSE STORMS.

STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT
PERSONNEL SHOULD STAY ALERT AS THIS SITUATION DEVELOPS. ACTIVATION
MAY BE REQUIRED LATER THIS AFTERNOON INTO TONIGHT.

FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEB SITE AT:
HTTP://WWW.JANNWS.STATE.MS.US

Special weather statement, Sep 8, 10:30 AM CDT, 5 hours 34 minutes before

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
090400-

AREA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
1030 AM CDT WED SEP 8 1999

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHEAST
ARKANSAS...NORTHEAST LOUISIANA AND WEST MISSISSIPPI TODAY. AN UPPER
LEVEL DISTURBANCE WILL APPROACH THE AREA FROM THE WEST. THE AIRMASS
OVER THE REGION IS VERY MOST AND UNSTABLE. AS A RESULT A FEW OF THE
STORMS MAY BECOME SEVERE THROUGH THIS EVENING. THE MAIN THREAT FROM
THESE STORMS WILL BE STRONG TO DAMAGING WINDS AND SOME HAIL.
SCATTERED THUNDERSTORMS ARE ALSO EXPECTED ACROSS THE EASTERN HALF OF
MISSISSIPPI TODAY...HEAVY RAINFALL AND GUSTY WINDS CAN BE EXPECTED
WITH THOSE STORMS.

STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT
PERSONNEL SHOULD STAY ALERT AS THIS SITUATION DEVELOPS. ACTIVATION
MAY BE REQUIRED LATER THIS AFTERNOON INTO TONIGHT.

FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEB SITE AT:
HTTP://WWW.JANNWS.STATE.MS.US

Local storm report, Sep 8, 2:54 PM CDT, 1 hour 10 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, Sep 8, 2:54 PM CDT, 1 hour 10 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 Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 8, 12:43 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Hinds	32 min
Sep 8, 12:48 PM CDT	Severe Thunderstorm Warning	JAN	Copiah	32 min
Sep 8, 1:14 PM CDT	Severe Thunderstorm Warning	JAN	Hinds	36 min
Sep 8, 1:25 PM CDT	Severe Thunderstorm Warning	JAN	Yazoo	35 min
Sep 8, 1:57 PM CDT	Severe Thunderstorm Warning	JAN	Hinds	33 min
Sep 8, 4:13 PM CDT	Severe Thunderstorm Warning	JAN	Clarke	32 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 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; the sounding from the Mesonet's radiosonde archive.