Alert archive / Louisiana / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 142, NWS New Orleans, LA

June 15, 2008Washington Parish, Louisiana; Pearl River County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Jun 15, 2008, 4:50 PM CDT for Washington Parish, Louisiana; Pearl River County, Mississippi. It was in force for 25 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: Jun 15, 2008, 4:50 PM CDT (21:50 UTC)
Expired: Jun 15, 2008, 5:15 PM CDT
In force: 25 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

Counties Washington Parish, LA, Pearl River County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.8 hours before the alert went out and 63 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: 2589 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 523 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

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 Jun 15, 3:31 PM CDT, 1 hour 19 minutes earlier.

Area forecast discussion, Jun 15, 3:31 PM CDT, 1 hour 19 minutes before

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In the hours before

Special weather statement, Jun 15, 2:26 PM CDT, 2 hours 24 minutes before

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Special weather statement, Jun 15, 2:32 PM CDT, 2 hours 18 minutes before

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Special weather statement, Jun 15, 2:57 PM CDT, 1 hour 53 minutes before

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Special weather statement, Jun 15, 3:14 PM CDT, 1 hour 36 minutes before

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Special weather statement, Jun 15, 3:43 PM CDT, 1 hour 7 minutes before

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Special weather statement, Jun 15, 4:00 PM CDT, 50 minutes before

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      <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
Jun 15, 4:14 AM CDT	Special Marine Warning	LIX		61 min
Jun 15, 4:23 AM CDT	Special Marine Warning	LIX		67 min
Jun 15, 5:07 AM CDT	Special Marine Warning	LIX		53 min
Jun 15, 7:32 AM CDT	Areal Flood Advisory	LIX	Orleans, Plaquemines, Saint Bernard	3 hr
Jun 15, 9:28 AM CDT	Flash Flood Warning	LIX	Jefferson, Orleans	3 hr
Jun 15, 3:04 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Livingston, Saint Helena	41 min
Jun 15, 4:19 PM CDT	Areal Flood Advisory	LIX	East Baton Rouge, East Feliciana	116 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2008 Severe Thunderstorm Warnings in Mississippi, 2008 Every severe thunderstorm warning in 2008

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.