Alert archive / Louisiana / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 60, NWS New Orleans, LA

May 13, 2007Saint Tammany Parish, Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at May 13, 2007, 6:20 PM CDT for Saint Tammany Parish, Tangipahoa Parish, Louisiana. 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: May 13, 2007, 6:20 PM CDT (23:20 UTC)
Expired: May 13, 2007, 6:45 PM CDT
In force: 25 min
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

Counties Saint Tammany Parish, LA, Tangipahoa Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.3 hours before the alert went out and 55 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: 542 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1397 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 2 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 May 13, 4:13 PM CDT, 2 hours 7 minutes earlier.

Area forecast discussion, May 13, 4:13 PM CDT, 2 hours 7 minutes before

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Hazardous weather outlook, May 13, 11:40 AM CDT, 6 hours 40 minutes before

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In the hours before

Local storm report, May 13, 4:48 PM CDT, 1 hour 32 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
May 13, 2:41 PM CDT	Special Marine Warning	LIX		28 min
May 13, 3:34 PM CDT	Special Marine Warning	LIX		86 min
May 13, 4:58 PM CDT	Special Marine Warning	LIX		47 min
May 13, 6:39 PM CDT	Severe Thunderstorm Warning	LIX	Assumption, Terrebonne	66 min
May 13, 6:43 PM CDT	Special Marine Warning	LIX		62 min
May 13, 3:54 PM CDT	Severe Thunderstorm Warning	LIX	Harrison	36 min
May 13, 4:55 PM CDT	Severe Thunderstorm Warning	LIX	Hancock	35 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2007 Every severe thunderstorm warning in 2007

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.