Alert archive / Louisiana / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 168, NWS New Orleans, LA

August 4, 2005Plaquemines Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Aug 4, 2005, 12:22 PM CDT for Plaquemines Parish, Louisiana. It was in force for 38 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 4, 2005, 12:22 PM CDT (17:22 UTC)
Expired: Aug 4, 2005, 1:00 PM CDT
In force: 38 min
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

County Plaquemines Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.4 hours before the alert went out and 79 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: 1008 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 845 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 10 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 4, 4:03 AM CDT, 8 hours 19 minutes earlier.

Area forecast discussion, Aug 4, 4:03 AM CDT, 8 hours 19 minutes before

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Hazardous weather outlook, Aug 4, 10:30 AM CDT, 1 hour 52 minutes before

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In the hours before

Special weather statement, Aug 4, 7:25 AM CDT, 4 hours 57 minutes before

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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 3, 8:46 PM CDT	Special Marine Warning	LIX		59 min
Aug 3, 9:51 PM CDT	Special Marine Warning	LIX		54 min
Aug 4, 4:25 PM CDT	Flash Flood Warning	LIX	Jackson	35 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2005 Every severe thunderstorm warning in 2005

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.