Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS New Orleans, LA

January 6, 2021East Baton Rouge Parish, Iberville Parish, West Baton Rouge Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at Jan 6, 2021, 11:11 PM CST for East Baton Rouge Parish, Iberville Parish, 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: Jan 6, 2021, 11:11 PM CST (05:11 UTC)
Expired: Jan 7, 2021, 12:00 AM CST
In force: 49 min
Issued by: NWS New Orleans, LA

Counties East Baton Rouge Parish, LA, Iberville Parish, LA, West Baton Rouge Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 5.2 hours before the alert went out and 141 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 807 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 317 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 Jan 6, 5:39 PM CST, 5 hours 32 minutes earlier.

Area forecast discussion, Jan 6, 5:39 PM CST, 5 hours 32 minutes before

Area Forecast Discussion
National Weather Service New Orleans LA
539 PM CST Wed Jan 6 2021

.AVIATION...

.Valid 00z 1/7 thru 06z 1/8...

VFR conditions will remain in place through around 06z. Between
06z and 14z, a band of showers will pass over the rterminals.
The heaviest showers will occur with a frontal passage and will
bring gusty winds, IFR visibilities and MVFR ceilings to the
terminals for an hour or so. After the band of convection moves
through, winds will shift to the west and remain gusty at 15 to 20
knots through tomorrow afternoon. A 925mb thermal trough axis will
also keep a low stratus deck in place through tomorrow evening
resulting in prevailing ceilings around 1000 feet.  PG

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  46  55  37  48 /  90  20   0   0
BTR  46  54  40  49 /  90   0   0   0
ASD  48  60  40  52 /  80  20   0   0
MSY  50  58  42  51 /  90  10   0   0
GPT  51  62  40  53 /  90  80   0   0
PQL  51  63  41  53 /  80  80   0   0

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...None.
GM...Small Craft Advisory from 9 PM this evening to 6 PM CST Friday
     for GMZ530-532-534-536-538-550-552-555-557-570-572-575-577.

MS...None.
GM...Small Craft Advisory from 9 PM this evening to 6 PM CST Friday
     for GMZ532-534-536-538-550-552-555-557-570-572-575-577.

&&

In the hours before

Special weather statement, Jan 6, 11:11 PM CST, 0 minutes before

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</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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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 6, 11:32 PM CST	Special Weather Statement	LIX	Terrebonne	43 min
Jan 6, 11:58 PM CST	Special Marine Warning	LIX		62 min
Jan 7, 12:31 AM CST	Special Weather Statement	LIX	Lafourche, Terrebonne	59 min
Jan 7, 12:51 AM CST	Special Weather Statement	LIX	Orleans, Saint Charles	54 min
Jan 7, 12:57 AM CST	Tornado Warning	LIX	Saint Helena	18 min
Jan 7, 1:01 AM CST	Special Marine Warning	LIX		59 min
Jan 7, 1:30 AM CST	Special Weather Statement	LIX	Orleans	60 min
Jan 7, 1:31 AM CST	Special Weather Statement	LIX	Jefferson, Plaquemines	59 min
Jan 7, 1:33 AM CST	Special Marine Warning	LIX		57 min
Jan 7, 2:00 AM CST	Special Marine Warning	LIX		60 min
Jan 7, 2:05 AM CST	Special Marine Warning	LIX		55 min
Jan 7, 3:02 AM CST	Special Marine Warning	LIX		58 min
Jan 7, 3:04 AM CST	Special Marine Warning	LIX		56 min
Jan 7, 3:57 AM CST	Special Marine Warning	LIX		63 min
Jan 7, 4:31 AM CST	Special Marine Warning	LIX		29 min
Jan 7, 4:56 AM CST	Special Marine Warning	LIX		34 min
Jan 7, 5:44 AM CST	Special Marine Warning	LIX		31 min
Jan 7, 4:07 AM CST	Special Weather Statement	LIX	Harrison, Jackson	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.