Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 104, NWS New Orleans, LA

August 29, 2017Lafourche Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Aug 29, 2017, 6:00 AM CDT for Lafourche Parish, Louisiana. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 29, 2017, 6:00 AM CDT (11:00 UTC)
Expired
Aug 29, 2017, 6:30 AM CDT
In force
30 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

County Lafourche Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 11.0 hours before the alert went out and 118 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 00:00Z on 2017-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 2017-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.193958Sfc1 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
10 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
809 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
236 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted.

316 
WFUS54 KLIX 291100
TORLIX
LAC057-291130-
/O.NEW.KLIX.TO.W.0104.170829T1100Z-170829T1130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
600 AM CDT TUE AUG 29 2017

The National Weather Service in New Orleans has issued a

* Tornado Warning for...
  Southeastern Lafourche Parish in southeastern Louisiana...

* Until 630 AM CDT
    
* At 600 AM CDT, a severe thunderstorm capable of producing a tornado
  was located 8 miles southeast of Leeville, or 22 miles southeast of
  Galliano, moving north at 25 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This tornadic thunderstorm will remain over mainly rural areas of
  southeastern Lafourche Parish.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 2938 9024 2940 9010 2915 9006 2913 9009
      2912 9014
TIME...MOT...LOC 1100Z 167DEG 21KT 2916 9011 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 28, 7:18 PM CDTSpecial Marine WarningLIX57 min
Aug 28, 8:16 PM CDTSpecial Marine WarningLIX59 min
Aug 28, 9:14 PM CDTSpecial Marine WarningLIX61 min
Aug 28, 10:31 PM CDTSpecial Marine WarningLIX59 min
Aug 28, 10:54 PM CDTSpecial Marine WarningLIX66 min
Aug 29, 12:40 AM CDTSpecial Marine WarningLIX50 min
Aug 29, 1:30 AM CDTSpecial Marine WarningLIX45 min
Aug 29, 2:16 AM CDTSpecial Marine WarningLIX44 min
Aug 29, 2:20 AM CDTSpecial Marine WarningLIX40 min
Aug 29, 3:08 AM CDTSpecial Marine WarningLIX52 min
Aug 29, 3:39 AM CDTCoastal Flood AdvisoryLIXSaint Bernard, Saint John the Baptist59 hr
Aug 29, 3:45 AM CDTSpecial Marine WarningLIX2 hr
Aug 29, 4:04 AM CDTSpecial Marine WarningLIX56 min
Aug 29, 4:36 AM CDTSpecial Weather StatementLIXLafourche24 min
Aug 29, 4:59 AM CDTSpecial Marine WarningLIX46 min
Aug 29, 5:24 AM CDTSpecial Weather StatementLIXJefferson36 min
Aug 29, 5:28 AM CDTTornado WarningLIXLafourche32 min
Aug 29, 6:08 AM CDTSpecial Marine WarningLIX2 hr
Aug 29, 7:03 AM CDTSpecial Weather StatementLIXLafourche, Saint Charles42 min
Aug 29, 8:00 AM CDTAreal Flood AdvisoryLIXAssumption, Lafourche, Saint James, Saint John the Baptist4 hr
Aug 29, 8:08 AM CDTAreal Flood AdvisoryLIXJefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 1 more5 hr
Aug 29, 8:13 AM CDTAreal Flood AdvisoryLIXTerrebonne62 min
Aug 29, 8:27 AM CDTFlash Flood WarningLIXJefferson, Lafourche, Saint Charles, Saint John the Baptist2 hr
Aug 29, 8:32 AM CDTFlash Flood WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard118 min
Aug 29, 8:54 AM CDTSpecial Marine WarningLIX2 hr
Aug 29, 9:14 AM CDTAreal Flood AdvisoryLIXAscension, Livingston5 hr
Aug 29, 9:50 AM CDTSpecial Marine WarningLIX85 min
Aug 29, 9:52 AM CDTSpecial Marine WarningLIX113 min
Aug 29, 10:27 AM CDTTropical Storm WatchLIXAssumption12 hr
Aug 29, 10:30 AM CDTRiver Flood WarningLIXTangipahoa4 days
Aug 29, 11:22 AM CDTSpecial Weather StatementLIXAssumption, Saint James53 min
Aug 29, 11:30 AM CDTFlash Flood WarningLIXAssumption, Lafourche, Saint Charles, Saint James, Saint John the Baptist, Terrebonne2 hr
Aug 29, 11:47 AM CDTAreal Flood AdvisoryLIXAssumption, Lafourche, Saint James, Saint John the Baptist, Terrebonne3 hr
Aug 29, 12:00 PM CDTSpecial Weather StatementLIXLafourche45 min
Aug 29, 12:47 PM CDTAreal Flood AdvisoryLIXLafourche, Saint Charles, Saint John the Baptist118 min
Aug 29, 1:53 PM CDTSpecial Marine WarningLIX67 min
Aug 29, 2:00 PM CDTTornado WarningLIXAscension, Assumption, Saint James45 min
Aug 29, 2:10 PM CDTSpecial Weather StatementLIXSaint Charles65 min
Aug 29, 2:43 PM CDTAreal Flood AdvisoryLIXAscension, Livingston, Saint James, Saint John the Baptist62 min
Aug 29, 2:53 PM CDTFlash Flood WarningLIXAscension, Saint James97 min
Aug 29, 3:24 PM CDTSpecial Marine WarningLIX96 min
Aug 29, 3:29 PM CDTSpecial Marine WarningLIX61 min
Aug 29, 4:31 PM CDTWind AdvisoryLIXAssumption, East Baton Rouge, Iberville, Pointe Coupee, Saint Bernard, Saint James and 3 more31 hr
Aug 29, 5:02 PM CDTSpecial Marine WarningLIX58 min
Aug 29, 5:06 PM CDTSpecial Marine WarningLIX54 min
Aug 29, 5:22 PM CDTTornado WarningLIXJefferson, Plaquemines22 min
Aug 29, 5:31 PM CDTAreal Flood AdvisoryLIXJefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles3 hr
Aug 29, 5:45 PM CDTSpecial Marine WarningLIX60 min
Aug 29, 5:48 PM CDTSpecial Weather StatementLIXOrleans42 min
Aug 29, 6:27 PM CDTSpecial Weather StatementLIXOrleans48 min
Aug 29, 6:38 PM CDTSpecial Marine WarningLIX97 min
Aug 29, 6:45 PM CDTSpecial Marine WarningLIX90 min

Nearby

Tornado Warnings in Louisiana, 2017Every tornado warning in 2017Tornadoes in 2017

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.