Alert archive / Mississippi / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 28, NWS Jackson, MS

March 20, 1989Rankin County, Simpson County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Mar 20, 1989, 2:50 PM CST for Rankin County, Simpson County, Mississippi. It was in force for 25 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 20, 1989, 2:50 PM CST (20:50 UTC)
Expired: Mar 20, 1989, 3:15 PM CST
In force: 25 min
Issued by: NWS Jackson, MS
Area: Whole counties

Counties Rankin County, MS, Simpson County, MS

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
Mar 20, 2:55 PM CST	Hail 0.75	Simpson, MS

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.8 hours before the alert went out and 206 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: 517 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 717 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.3

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, Mar 20, 12:15 PM CST, 2 hours 35 minutes before

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Special weather statement, Mar 20, 1:10 PM CST, 1 hour 40 minutes before

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Special weather statement, Mar 20, 1:12 PM CST, 1 hour 38 minutes before

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<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.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 20, 3:41 PM CST	Severe Thunderstorm Warning	JAN	Jefferson Davis, Marion	24 min
Mar 20, 4:02 PM CST	Severe Thunderstorm Warning	JAN	Lauderdale	43 min
Mar 20, 4:32 PM CST	Severe Thunderstorm Warning	JAN	Kemper	43 min
Mar 20, 4:44 PM CST	Severe Thunderstorm Warning	JAN	Clarke, Jasper	46 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1989 Every severe thunderstorm warning in 1989

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.