Alert archive / Louisiana / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 157, NWS New Orleans, LA

August 16, 2024Jefferson Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Aug 16, 2024, 2:18 PM CDT for Jefferson Parish, Louisiana. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 16, 2024, 2:18 PM CDT (19:18 UTC)
Expired: Aug 16, 2024, 3:00 PM CDT
In force: 42 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Jefferson Parish, LA

The radar

The Hammond radar (KHDC), 98 km from the middle of the area, began a volume at 19:22 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 7.3 hours before the alert went out and 293 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: 583 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 1341 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 16, 12:49 PM CDT, 1 hour 29 minutes earlier.

Area forecast discussion, Aug 16, 12:49 PM CDT, 1 hour 29 minutes before

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In the hours before

Local storm report, Aug 16, 11:28 AM CDT, 2 hours 50 minutes before

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Special weather statement, Aug 16, 1:34 PM CDT, 44 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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Special weather statement, Aug 16, 2:11 PM CDT, 7 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.
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      <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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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 1:34 PM CDT	Special Weather Statement	LIX	Saint Charles	41 min
Aug 16, 2:19 PM CDT	Heat Advisory	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 13 more	29 hr
Aug 16, 2:20 PM CDT	Special Weather Statement	LIX	Saint Charles	25 min
Aug 16, 2:34 PM CDT	Special Weather Statement	LIX	Saint Charles	41 min
Aug 16, 2:44 PM CDT	Areal Flood Advisory	LIX	Jefferson	2 hr
Aug 16, 2:58 PM CDT	Special Weather Statement	LIX	Saint Charles	32 min
Aug 16, 3:01 PM CDT	Special Weather Statement	LIX	Saint Charles	29 min
Aug 16, 4:26 PM CDT	Special Weather Statement	LIX	Washington	34 min
Aug 16, 4:49 PM CDT	Severe Thunderstorm Warning	LIX	Washington	41 min
Aug 16, 5:15 PM CDT	Severe Thunderstorm Warning	LIX	Washington	14 min
Aug 16, 5:19 PM CDT	Special Weather Statement	LIX	West Feliciana	26 min
Aug 16, 5:27 PM CDT	Special Weather Statement	LIX	Washington	33 min
Aug 16, 6:03 PM CDT	Special Weather Statement	LIX	East Feliciana	27 min
Aug 16, 6:12 PM CDT	Special Weather Statement	LIX	West Feliciana	33 min
Aug 16, 6:37 PM CDT	Special Weather Statement	LIX	Saint Helena	38 min
Aug 16, 2:11 PM CDT	Special Weather Statement	LIX	Jackson	34 min
Aug 16, 3:24 PM CDT	Special Weather Statement	LIX	Hancock	36 min
Aug 16, 5:41 PM CDT	Special Weather Statement	LIX	Pike	34 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2024 Every severe thunderstorm warning in 2024

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; radar from the NEXRAD Level II archive.