Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS New Orleans, LA

August 25, 2021West Baton Rouge Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at Aug 25, 2021, 2:56 PM CDT for West Baton Rouge Parish, Louisiana. It was in force for 49 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: Aug 25, 2021, 2:56 PM CDT (19:56 UTC)
Expired: Aug 25, 2021, 3:45 PM CDT
In force: 49 min
Issued by: NWS New Orleans, LA
Hail: 0.00 in
Wind: 40

County West Baton Rouge Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.9 hours before the alert went out and 139 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: 1248 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 1239 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 11 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 Aug 25, 10:11 AM CDT, 4 hours 45 minutes earlier.

Area forecast discussion, Aug 25, 10:11 AM CDT, 4 hours 45 minutes before

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<head>
  <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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In the hours before

Special weather statement, Aug 25, 2:56 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service New Orleans LA
256 PM CDT Wed Aug 25 2021

LAZ046>049-252045-
Iberville LA-Ascension LA-West Baton Rouge LA-East Baton Rouge LA-
256 PM CDT Wed Aug 25 2021

...A strong thunderstorm will impact portions of northwestern
Ascension, southeastern West Baton Rouge, southeastern Iberville and
south central East Baton Rouge Parishes through 345 PM CDT...

At 255 PM CDT, Doppler radar was tracking a strong thunderstorm over
Gardere, or near Oak Hills Place, moving southwest at 15 mph.

HAZARD...Winds in excess of 30 to 40 mph and frequent lightning.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Baton Rouge, Plaquemine, Port Allen, Oak Hills Place, St. Gabriel,
Addis, Brusly, White Castle, Westminster, Merrydale, Inniswold,
Prairieville, Village St. George, Gardere, Carville, Old Jefferson,
Shenandoah and Brownfields.

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 144 and 175.
 Interstate 12 between mile markers 1 and 6.
 Interstate 110 in Louisiana between mile markers 1 and 6.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 3055 9105 3038 9101 3027 9090 3012 9123
      3025 9136 3046 9138
TIME...MOT...LOC 1955Z 062DEG 11KT 3033 9111

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

KLG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 3:35 PM CDT	Special Weather Statement	LIX	Tangipahoa	40 min
Aug 25, 4:03 PM CDT	Special Weather Statement	LIX	Saint Tammany	27 min
Aug 25, 4:22 PM CDT	Special Marine Warning	LIX		38 min
Aug 25, 5:00 PM CDT	Special Weather Statement	LIX	Saint Tammany	45 min
Aug 25, 5:31 PM CDT	Special Weather Statement	LIX	Saint Charles	44 min
Aug 25, 5:52 PM CDT	Special Weather Statement	LIX	Saint Charles	23 min
Aug 25, 6:18 PM CDT	Special Weather Statement	LIX	Saint Charles	27 min
Aug 25, 6:38 PM CDT	Special Weather Statement	LIX	Jefferson	37 min
Aug 25, 3:37 PM CDT	Special Weather Statement	LIX	Hancock	38 min

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.