Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS New Orleans, LA

July 15, 2021Iberville Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at Jul 15, 2021, 11:40 AM CDT for Iberville Parish, Louisiana. It was in force for 35 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: Jul 15, 2021, 11:40 AM CDT (16:40 UTC)
Expired: Jul 15, 2021, 12:15 PM CDT
In force: 35 min
Issued by: NWS New Orleans, LA

County Iberville Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.7 hours before the alert went out and 158 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: 2331 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 619 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: -34 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 Jul 15, 10:08 AM CDT, 1 hour 32 minutes earlier.

Area forecast discussion, Jul 15, 10:08 AM CDT, 1 hour 32 minutes before

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In the hours before

Special weather statement, Jul 15, 10:23 AM CDT, 1 hour 17 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">
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      </p>
      <p id="message2">
        Please try again in a few minutes.
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Special weather statement, Jul 15, 11:40 AM CDT, 0 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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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
Jul 15, 10:23 AM CDT	Special Weather Statement	LIX	Terrebonne	37 min
Jul 15, 11:42 AM CDT	Special Weather Statement	LIX	Jefferson	63 min
Jul 15, 11:48 AM CDT	Special Weather Statement	LIX	Saint James	57 min
Jul 15, 12:21 PM CDT	Special Weather Statement	LIX	Saint Charles	54 min
Jul 15, 12:31 PM CDT	Areal Flood Advisory	LIX	Jefferson	65 min
Jul 15, 12:45 PM CDT	Special Weather Statement	LIX	Washington	75 min
Jul 15, 12:48 PM CDT	Flash Flood Warning	LIX	Jefferson	49 min
Jul 15, 12:53 PM CDT	Special Weather Statement	LIX	Saint John the Baptist	82 min
Jul 15, 1:11 PM CDT	Special Weather Statement	LIX	Orleans	79 min
Jul 15, 1:33 PM CDT	Special Weather Statement	LIX	West Feliciana	57 min
Jul 15, 1:50 PM CDT	Special Weather Statement	LIX	Saint Tammany	55 min
Jul 15, 1:58 PM CDT	Special Weather Statement	LIX	East Baton Rouge	62 min
Jul 15, 2:35 PM CDT	Special Weather Statement	LIX	Tangipahoa	55 min
Jul 15, 2:47 PM CDT	Special Weather Statement	LIX	Saint James	58 min
Jul 15, 3:31 PM CDT	Special Weather Statement	LIX	East Feliciana	29 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.