Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 112, NWS New Orleans, LA

October 21, 2017East Baton Rouge Parish, East Feliciana Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Oct 21, 2017, 10:24 PM CDT for East Baton Rouge Parish, East Feliciana Parish, Louisiana. It was in force for 16 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
Oct 21, 2017, 10:24 PM CDT (03:24 UTC)
Expired
Oct 21, 2017, 10:40 PM CDT
In force
16 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.4 hours before the alert went out and 153 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 2017-10-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1538 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 00:00Z on 2017-10-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
1538 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
684 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted.

010 
WFUS54 KLIX 220324
TORLIX
LAC033-037-220400-
/O.NEW.KLIX.TO.W.0112.171022T0324Z-171022T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
1024 PM CDT SAT OCT 21 2017

The National Weather Service in New Orleans has issued a

* Tornado Warning for...
  Southwestern East Feliciana Parish in southeastern Louisiana...
  Northwestern East Baton Rouge Parish in southeastern Louisiana...

* Until 1100 PM CDT
    
* At 1024 PM CDT, a severe thunderstorm capable of producing a
  tornado was located 7 miles west of Zachary, moving northeast at 15
  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 dangerous storm will be near...
  Zachary around 1055 PM CDT. 
  Slaughter around 1100 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

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

&&

LAT...LON 3083 9117 3071 9101 3061 9126 3062 9130
      3065 9130
TIME...MOT...LOC 0324Z 227DEG 13KT 3064 9127 

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

$$

24/RR
1 follow-up statement
866 
WWUS54 KLIX 220340
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
1040 PM CDT SAT OCT 21 2017

LAC033-037-220350-
/O.CAN.KLIX.TO.W.0112.000000T0000Z-171022T0400Z/
East Feliciana LA-East Baton Rouge LA-
1040 PM CDT SAT OCT 21 2017

...THE TORNADO WARNING FOR SOUTHWESTERN EAST FELICIANA AND
NORTHWESTERN EAST BATON ROUGE PARISHES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.  However heavy rain is
still possible with this thunderstorm.

LAT...LON 3083 9117 3071 9101 3061 9126 3062 9130
      3065 9130
TIME...MOT...LOC 0340Z 227DEG 13KT 3068 9122 

$$

24/RR

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 21, 8:05 PM CDTAreal Flood AdvisoryLIXIberville, Pointe Coupee, West Baton Rouge3 hr
Oct 21, 8:45 PM CDTFlash Flood WatchLIXEast Feliciana, Iberville, Pointe Coupee, West Baton Rouge, West Feliciana19 hr
Oct 21, 11:08 PM CDTSpecial Weather StatementLIXEast Feliciana37 min
Oct 21, 11:24 PM CDTAreal Flood AdvisoryLIXEast Feliciana, Pointe Coupee, West Feliciana2 hr
Oct 22, 1:26 AM CDTFlash Flood WarningLIXEast Feliciana, West Feliciana3 hr
Oct 22, 1:46 AM CDTSevere Thunderstorm WarningLIXEast Feliciana29 min
Oct 22, 2:33 AM CDTSevere Thunderstorm WarningLIXEast Feliciana42 min
Oct 22, 3:31 AM CDTAreal Flood AdvisoryLIXEast Feliciana, Saint Helena119 min
Oct 22, 4:00 AM CDTFlash Flood WarningLIXEast Feliciana3 hr
Oct 22, 4:24 AM CDTTornado WarningLIXSaint Helena51 min
Oct 22, 5:20 AM CDTFlash Flood WarningLIXEast Feliciana, Saint Helena115 min
Oct 22, 7:27 AM CDTAreal Flood WarningLIXEast Feliciana, West Feliciana6 hr
Oct 22, 7:31 AM CDTSpecial Weather StatementLIXSaint Tammany, Washington29 min
Oct 22, 7:40 AM CDTSpecial Marine WarningLIX35 min
Oct 22, 8:14 AM CDTSpecial Marine WarningLIX61 min
Oct 22, 8:26 AM CDTSpecial Weather StatementLIXOrleans34 min
Oct 22, 9:12 AM CDTSpecial Marine WarningLIX48 min
Oct 22, 9:38 AM CDTSpecial Weather StatementLIXEast Baton Rouge, East Feliciana, West Baton Rouge82 min
Oct 22, 9:55 AM CDTSpecial Marine WarningLIX65 min
Oct 22, 10:15 AM CDTSpecial Weather StatementLIXAscension, Iberville, Livingston, Saint Helena, Tangipahoa75 min
Oct 22, 10:44 AM CDTAreal Flood WarningLIXPointe Coupee3 hr
Oct 22, 10:48 AM CDTSpecial Marine WarningLIX87 min
Oct 22, 10:58 AM CDTSpecial Marine WarningLIX92 min
Oct 22, 11:07 AM CDTSpecial Weather StatementLIXOrleans, Saint Charles, Saint James, Saint John the Baptist, Saint Tammany, Washington23 min
Oct 22, 11:26 AM CDTSevere Thunderstorm WarningLIXJefferson, Saint Charles, Saint John the Baptist51 min
Oct 22, 11:57 AM CDTSevere Thunderstorm WarningLIXOrleans, Saint Tammany, Washington48 min
Oct 22, 12:02 PM CDTSevere Thunderstorm WarningLIXJefferson, Lafourche, Plaquemines, Saint Bernard, Saint Charles28 min
Oct 22, 12:11 PM CDTSevere Thunderstorm WarningLIXJefferson, Lafourche, Plaquemines, Terrebonne64 min
Oct 22, 12:16 PM CDTSpecial Marine WarningLIX89 min
Oct 22, 12:30 PM CDTSpecial Marine WarningLIX90 min
Oct 22, 12:37 PM CDTSevere Thunderstorm WarningLIXPlaquemines, Saint Bernard23 min
Oct 22, 12:47 PM CDTSpecial Marine WarningLIX88 min
Oct 22, 1:46 PM CDTSpecial Marine WarningLIX89 min
Oct 22, 2:11 PM CDTSpecial Marine WarningLIX2 hr
Oct 22, 2:48 PM CDTSpecial Marine WarningLIX117 min
Oct 22, 2:50 PM CDTSpecial Marine WarningLIX115 min
Oct 22, 3:20 PM CDTSpecial Marine WarningLIX85 min
Oct 22, 3:46 PM CDTSmall Craft AdvisoryLIX26 hr

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.