Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS New Orleans, LA

June 6, 2021Saint Bernard Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at Jun 6, 2021, 11:32 AM CDT for Saint Bernard Parish, Louisiana. It was in force for 43 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 6, 2021, 11:32 AM CDT (16:32 UTC)
Expired
Jun 6, 2021, 12:15 PM CDT
In force
43 min
Issued by
NWS New Orleans, LA

County Saint Bernard Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.5 hours before the alert went out and 59 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2021-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1791 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2021-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 181 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1791 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
571 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
181 m²/s²
0-3 km storm-relative helicity
240 m²/s²
Significant tornado parameter
1.4
Supercell composite
9.7

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 6, 4:57 AM CDT, 6 hours 35 minutes earlier.

Area forecast discussion, Jun 6, 4:57 AM CDT, 6 hours 35 minutes before
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<html lang="en">
<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>
      <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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In the hours before

Special weather statement, Jun 6, 9:57 AM CDT, 1 hour 35 minutes before
Special Weather Statement
National Weather Service New Orleans LA
957 AM CDT Sun Jun 6 2021

LAZ068-069-061530-
Lower Plaquemines-Lower Jefferson-
957 AM CDT Sun Jun 6 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL PLAQUEMINES
PARISH...

At 956 AM CDT, radar indicated strong thunderstorms were located
along a line extending from 17 miles southwest of Port Sulphur to 9
miles south of Empire. Movement was northeast at 35 mph.

Winds in excess of 40 mph are possible with these storms.

Locations impacted include...
Buras, Empire and Buras-triumph.

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

LAT...LON 2929 8967 2933 8964 2932 8983 2934 8978
      2934 8982 2928 8998 2929 8997 2934 8984
      2939 8986 2937 8979 2943 8982 2941 8987
      2948 8985 2934 9002 2944 8990 2951 8994
      2938 8946 2924 8958
TIME...MOT...LOC 1456Z 208DEG 40KT 2934 8994 2928 8966

ABS
Special weather statement, Jun 6, 10:38 AM CDT, 54 minutes before
Special Weather Statement
National Weather Service New Orleans LA
1038 AM CDT Sun Jun 6 2021

LAZ069-061630-
Lower Plaquemines-
1038 AM CDT Sun Jun 6 2021

...A STRONG THUNDERSTORM WILL AFFECT WEST CENTRAL PLAQUEMINES
PARISH...

At 1038 AM CDT, a strong thunderstorm was located near Port Sulphur,
moving north at 30 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Port Sulphur and Empire.

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

LAT...LON 2932 8983 2934 8978 2934 8982 2931 8986
      2932 8991 2935 8983 2939 8986 2936 8982
      2940 8978 2939 8983 2943 8982 2941 8987
      2945 8982 2948 8984 2944 8989 2958 8988
      2946 8959 2929 8969 2931 8969
TIME...MOT...LOC 1538Z 184DEG 25KT 2943 8980

ABS
Special weather statement, Jun 6, 11:32 AM CDT, 0 minutes before
Special Weather Statement
National Weather Service New Orleans LA
1132 AM CDT Sun Jun 6 2021

LAZ069-070-061715-
Lower Plaquemines-Lower St. Bernard-
1132 AM CDT Sun Jun 6 2021

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL ST. BERNARD AND NORTH
CENTRAL PLAQUEMINES PARISHES...

At 1131 AM CDT, a strong thunderstorm was located 9 miles northeast
of Pointe A La Hache, or 10 miles northeast of Port Sulphur, moving
north at 20 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Shell Beach.

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

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 2965 8974 2987 8971 2988 8945 2973 8955
      2976 8958 2972 8960 2976 8963 2975 8965
      2973 8965 2970 8956 2969 8963 2968 8958
      2966 8959 2968 8966 2966 8967 2965 8965
TIME...MOT...LOC 1631Z 197DEG 19KT 2964 8965

ABS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 8:25 AM CDTSpecial Marine WarningLIX95 min
Jun 6, 8:27 AM CDTSpecial Marine WarningLIX34 min
Jun 6, 9:07 AM CDTTornado WarningLIXAscension, Livingston, Saint James, Tangipahoa14 min
Jun 6, 9:23 AM CDTTornado Warning Tornado observedLIXPlaquemines23 min
Jun 6, 9:57 AM CDTSpecial Weather StatementLIXPlaquemines33 min
Jun 6, 10:01 AM CDTTornado WarningLIXPlaquemines32 min
Jun 6, 10:14 AM CDTSpecial Marine WarningLIX91 min
Jun 6, 10:26 AM CDTSpecial Marine WarningLIX64 min
Jun 6, 10:38 AM CDTSpecial Weather StatementLIXPlaquemines52 min
Jun 6, 10:46 AM CDTAreal Flood AdvisoryLIXAscension, East Baton Rouge, Iberville, West Baton Rouge4 hr
Jun 6, 11:28 AM CDTSpecial Marine WarningLIX32 min
Jun 6, 11:44 AM CDTSpecial Marine WarningLIX61 min
Jun 6, 11:51 AM CDTAreal Flood AdvisoryLIXAscension, East Baton Rouge, Iberville, Livingston, Tangipahoa3 hr
Jun 6, 11:58 AM CDTFlash Flood WarningLIXTangipahoa, Washington3 hr
Jun 6, 12:22 PM CDTSpecial Marine WarningLIX23 min
Jun 6, 12:46 PM CDTSpecial Weather StatementLIXLafourche29 min
Jun 6, 12:53 PM CDTSpecial Weather StatementLIXTangipahoa52 min
Jun 6, 12:57 PM CDTSpecial Marine WarningLIX63 min
Jun 6, 1:52 PM CDTSpecial Marine WarningLIX23 min
Jun 6, 1:59 PM CDTSpecial Marine WarningLIX61 min
Jun 6, 2:15 PM CDTSpecial Marine WarningLIX45 min
Jun 6, 3:01 PM CDTSpecial Marine WarningLIX59 min
Jun 6, 3:07 PM CDTSpecial Marine WarningLIX53 min
Jun 6, 3:22 PM CDTSpecial Marine WarningLIX38 min
Jun 6, 3:41 PM CDTSpecial Marine WarningLIX19 min
Jun 6, 3:59 PM CDTSpecial Marine WarningLIX61 min
Jun 6, 4:39 PM CDTSpecial Marine WarningLIX31 min
Jun 6, 4:52 PM CDTSpecial Marine WarningLIX83 min
Jun 6, 5:36 PM CDTSpecial Marine WarningLIX39 min
Jun 6, 10:23 AM CDTRiver Flood WarningLIXHarrison47 hr
Jun 6, 10:26 AM CDTRiver Flood WarningLIXHarrison39 hr
Jun 6, 10:52 AM CDTRiver Flood WarningLIXHarrison30 hr
Jun 6, 2:48 PM CDTRiver Flood WarningLIXPike41 hr
Jun 6, 4:30 PM CDTSpecial Weather StatementLIXHarrison30 min

Nearby

Special Weather Statements in Louisiana, 2021Every 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.