Alert archive / Louisiana / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 13, NWS New Orleans, LA

February 22, 2010Lafourche Parish, Terrebonne Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Feb 22, 2010, 2:25 AM CST for Lafourche Parish, Terrebonne Parish, Louisiana. It was in force for 65 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: Feb 22, 2010, 2:25 AM CST (08:25 UTC)
Expired: Feb 22, 2010, 3:30 AM CST
In force: 65 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

Counties Lafourche Parish, LA, Terrebonne Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 8.4 hours before the alert went out and 128 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: 344 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 524 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 188 m²/s²
0-3 km storm-relative helicity: 233 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

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 Feb 21, 11:56 PM CST, 2 hours 29 minutes earlier.

Area forecast discussion, Feb 21, 11:56 PM CST, 2 hours 29 minutes before

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Hazardous weather outlook, Feb 21, 11:49 PM CST, 2 hours 36 minutes before

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In the hours before

Special weather statement, Feb 21, 9:49 PM CST, 4 hours 36 minutes before

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Local storm report, Feb 21, 9:55 PM CST, 4 hours 30 minutes before

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Local storm report, Feb 21, 10:20 PM CST, 4 hours 5 minutes before

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Local storm report, Feb 21, 10:29 PM CST, 3 hours 56 minutes before

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Special weather statement, Feb 21, 10:45 PM CST, 3 hours 40 minutes before

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Special weather statement, Feb 21, 11:02 PM CST, 3 hours 23 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
Feb 21, 8:30 PM CST	Severe Thunderstorm Warning	LIX	East Feliciana, Saint Helena, West Feliciana	45 min
Feb 21, 8:38 PM CST	Special Marine Warning	LIX		22 min
Feb 21, 9:01 PM CST	Special Marine Warning	LIX		44 min
Feb 21, 9:38 PM CST	Marine Dense Fog Advisory	LIX		11 hr
Feb 21, 10:01 PM CST	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge	44 min
Feb 21, 11:11 PM CST	Special Marine Warning	LIX		49 min
Feb 21, 11:47 PM CST	Dense Fog Advisory	LIX	Assumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Bernard and 6 more	6 hr
Feb 22, 12:02 AM CST	Special Marine Warning	LIX		58 min
Feb 22, 12:15 AM CST	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche	23 min
Feb 22, 2:22 AM CST	Severe Thunderstorm Warning	LIX	Plaquemines, Saint Bernard	53 min
Feb 22, 2:33 AM CST	Special Marine Warning	LIX		57 min
Feb 22, 7:16 AM CST	Special Marine Warning	LIX		44 min
Feb 22, 11:36 AM CST	Dense Fog Advisory	LIX		3 hr
Feb 21, 9:14 PM CST	Severe Thunderstorm Warning	LIX	Amite, Pike	46 min
Feb 21, 9:56 PM CST	Severe Thunderstorm Warning	LIX	Pike, Walthall	64 min
Feb 21, 10:53 PM CST	Flash Flood Warning	LIX	Pike, Walthall	112 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2010 Every severe thunderstorm warning in 2010

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.