Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS New Orleans, LA

June 25, 2021Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at Jun 25, 2021, 12:23 PM CDT for Saint Tammany Parish, Louisiana. It was in force for 52 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: Jun 25, 2021, 12:23 PM CDT (17:23 UTC)
Expired: Jun 25, 2021, 1:15 PM CDT
In force: 52 min
Issued by: NWS New Orleans, LA

County Saint Tammany Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 5.4 hours before the alert went out and 315 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: 2875 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 616 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jun 25, 3:38 AM CDT, 8 hours 45 minutes earlier.

Area forecast discussion, Jun 25, 3:38 AM CDT, 8 hours 45 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <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.
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      <p id="message2">
        Please try again in a few minutes.
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In the hours before

Special weather statement, Jun 25, 12:23 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service New Orleans LA
1223 PM CDT Fri Jun 25 2021

LAZ039-075-251815-
Washington-Northwest St. Tammany-
1223 PM CDT Fri Jun 25 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL ST. TAMMANY AND
SOUTH CENTRAL WASHINGTON PARISHES...

At 1222 PM CDT, a strong thunderstorm was located near Bush, or 10
miles east of Covington, moving north at 10 mph.

Wind gusts of 30-35 mph are possible with this storm, along with
heavy rainfall and frequent lightning.

Locations impacted include...
Abita Springs, Sun and Bush.

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is also occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 3041 8987 3040 8998 3071 9016 3076 8989
TIME...MOT...LOC 1722Z 165DEG 10KT 3054 8994

95/DM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 5:22 AM CDT	Special Marine Warning	LIX		83 min
Jun 25, 7:13 AM CDT	Special Marine Warning	LIX		2 hr
Jun 25, 9:11 AM CDT	Special Marine Warning	LIX		64 min
Jun 25, 12:42 PM CDT	Areal Flood Advisory	LIX	Saint Tammany	2 hr
Jun 25, 1:44 PM CDT	Flash Flood Warning	LIX	Saint Tammany	2 hr
Jun 25, 1:54 PM CDT	Areal Flood Advisory	LIX	East Baton Rouge, Livingston	70 min
Jun 25, 2:15 PM CDT	Areal Flood Advisory	LIX	Washington	2 hr
Jun 25, 2:24 PM CDT	Areal Flood Advisory	LIX	Terrebonne	111 min
Jun 25, 2:42 PM CDT	Areal Flood Advisory	LIX	East Feliciana	111 min
Jun 25, 2:58 PM CDT	Areal Flood Advisory	LIX	Saint Charles, Saint John the Baptist	104 min
Jun 25, 3:32 PM CDT	Areal Flood Advisory	LIX	East Feliciana	72 min
Jun 25, 5:59 AM CDT	River Flood Warning	LIX	Harrison	25 hr
Jun 25, 3:45 PM CDT	Areal Flood Advisory	LIX	Wilkinson	2 hr

Nearby

Special Weather Statements in Louisiana, 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.