Alert archive / Mississippi / Special Weather Statements in 2021

Special Weather Statement, NWS New Orleans, LA

May 4, 2021Wilkinson County, Mississippi

NWS New Orleans, LA issued this special weather statement at May 4, 2021, 2:15 PM CDT for Wilkinson County, Mississippi. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 4, 2021, 2:15 PM CDT (19:15 UTC)
Expired: May 4, 2021, 2:45 PM CDT
In force: 30 min
Issued by: NWS New Orleans, LA

County Wilkinson County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 7.3 hours before the alert went out and 164 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: 2428 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 646 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 170 m²/s²
0-3 km storm-relative helicity: 235 m²/s²
Significant tornado parameter: 2.8
Supercell composite: 13.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before this special weather statement went out at May 4, 12:53 PM CDT, 1 hour 22 minutes earlier.

Area forecast discussion, May 4, 12:53 PM CDT, 1 hour 22 minutes before

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<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>
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In the hours before

Special weather statement, May 4, 2:15 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service New Orleans LA
215 PM CDT Tue May 4 2021

MSZ068-041945-
Wilkinson-
215 PM CDT Tue May 4 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN WILKINSON COUNTY...

At 214 PM CDT, a strong thunderstorm was located near Dolorosa, or 24
miles south of Natchez, moving northeast at 40 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Dolorosa.

LAT...LON 3135 9121 3134 9115 3132 9111 3110 9127
      3123 9149 3126 9148 3128 9150 3129 9147
      3132 9146 3132 9140 3136 9130 3137 9123
TIME...MOT...LOC 1914Z 205DEG 35KT 3122 9133

MSW

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 4, 4:11 AM CDT	Flash Flood Watch	LIX	Assumption, East Baton Rouge, East Feliciana, Iberville, Orleans, Pointe Coupee and 9 more	33 hr
May 4, 9:54 AM CDT	River Flood Warning	LIX	Tangipahoa	21 days
May 4, 2:26 PM CDT	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	64 min
May 4, 2:58 PM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, Pointe Coupee, West Feliciana	47 min
May 4, 3:33 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Saint Helena, Tangipahoa, Washington, West Feliciana	42 min
May 4, 4:10 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Saint Helena, Saint Tammany, Tangipahoa, Washington	65 min
May 4, 4:24 PM CDT	Areal Flood Advisory	LIX	East Baton Rouge, East Feliciana, Livingston, Pointe Coupee, Saint Helena, West Baton Rouge and 1 more	97 min
May 4, 4:37 PM CDT	Areal Flood Advisory	LIX	East Baton Rouge, East Feliciana, Livingston, Saint Helena, Tangipahoa, Washington	106 min
May 4, 4:56 PM CDT	Special Weather Statement	LIX	Tangipahoa, Washington	34 min
May 4, 5:32 PM CDT	Special Weather Statement	LIX	Tangipahoa, Washington	43 min

Nearby

Special Weather Statements in Mississippi, 2021 Every special weather statement in 2021

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.