Alert archive / Louisiana / Tornado Watches in 2008

Tornado Watch 321

May 14, 200837 parishes in Louisiana; 12 counties in Mississippi

The Storm Prediction Center issued this tornado watch at May 14, 2008, 2:04 PM CDT for 37 parishes in Louisiana; 12 counties in Mississippi. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
May 14, 2008, 2:04 PM CDT (19:04 UTC)
Expired
May 14, 2008, 9:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
All 49 counties

Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Jefferson Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Pointe Coupee Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Terrebonne Parish, LA, Vermilion Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Franklin County, MS, Hancock County, MS, Jefferson Davis County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS

Warnings issued inside it

18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 14, 2:41 PM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, Iberville, Pointe Coupee, West Baton Rouge49 min
May 14, 2:54 PM CDTSevere Thunderstorm WarningLCHBeauregard36 min
May 14, 3:23 PM CDTSevere Thunderstorm WarningLIXEast Baton Rouge52 min
May 14, 3:57 PM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, East Feliciana, Livingston, Saint Helena48 min
May 14, 4:21 PM CDTSevere Thunderstorm WarningLIXAscension, East Baton Rouge, East Feliciana, Livingston, Saint Helena39 min
May 14, 4:32 PM CDTTornado WarningLIXLivingston, Tangipahoa28 min
May 14, 4:53 PM CDTTornado WarningLIXLivingston, Tangipahoa52 min
May 14, 4:57 PM CDTSevere Thunderstorm WarningLIXLivingston, Tangipahoa48 min
May 14, 5:38 PM CDTTornado WarningLIXSaint Tammany, Tangipahoa52 min
May 14, 5:40 PM CDTFlash Flood WarningLIXEast Baton Rouge, Iberville, Livingston, Pointe Coupee, Tangipahoa, West Baton Rouge3 hr
May 14, 5:55 PM CDTSevere Thunderstorm WarningLIXSaint Tammany, Tangipahoa65 min
May 14, 6:08 PM CDTTornado WarningLIXSaint Tammany, Tangipahoa52 min
May 14, 7:00 PM CDTSevere Thunderstorm WarningLIXSaint Tammany45 min
May 14, 7:40 PM CDTSevere Thunderstorm WarningLIXSaint Tammany50 min
May 14, 7:41 PM CDTSevere Thunderstorm WarningLIXJefferson, Orleans, Saint Bernard49 min
May 14, 7:53 PM CDTFlash Flood WarningLIXSaint Tammany2 hr
May 14, 8:30 PM CDTSevere Thunderstorm WarningLIXHancock, Harrison45 min
May 14, 8:39 PM CDTFlash Flood WarningLIXEast Baton Rouge, Iberville, Livingston, Pointe Coupee, Tangipahoa, West Baton Rouge2 hr

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.1 hours before the alert went out and 166 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2008-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 583 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2008-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
-90 J/kg
Mixed-layer LCL
608 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
187 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 13, 7:11 PM CDTMesoscale DiscussionSPCAcadia, Ascension, Assumption, Avoyelles, Bienville, Bossier and 45 more2 hr
May 14, 2:28 AM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Claiborne, De Soto, Natchitoches and 3 more92 min
May 14, 7:31 AM CDTMesoscale DiscussionSPCBeauregard, Bienville, De Soto, Grant, Jackson, LaSalle and 7 more119 min
May 14, 7:50 AM CDTTornado WatchSPCBeauregard, Caldwell, De Soto, Grant, LaSalle, Natchitoches and 5 more7 hr
May 14, 10:23 AM CDTMesoscale DiscussionSPCBeauregard, Bienville, De Soto, Grant, Jackson, LaSalle and 7 more97 min
May 14, 1:55 PM CDTMesoscale DiscussionSPCAscension, Avoyelles, Catahoula, Concordia, East Baton Rouge, East Feliciana and 10 more65 min
May 14, 5:12 PM CDTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 34 more63 min

Nearby

Tornado Watches in Louisiana, 2008Tornado Watches in Mississippi, 2008Every tornado watch 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.