Alert archive / Louisiana / Tornado Warnings in 2021

Tornado Warning 18, NWS New Orleans, LA

April 16, 2021Plaquemines Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Apr 16, 2021, 9:34 AM CDT for Plaquemines Parish, Louisiana. It was in force for 11 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 16, 2021, 9:34 AM CDT (14:34 UTC)
Expired: Apr 16, 2021, 9:45 AM CDT
In force: 11 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Plaquemines Parish, LA

What was reported inside it

Time	Report	Where	Remark
Apr 16, 9:43 AM CDT	FUNNEL CLOUD	Venice, LA	TRAINED SPOTTER REPORTS FUNNEL CLOUD IN VENICE PASSING HWY 23.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 2.6 hours before the alert went out and 126 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 822 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 152 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

049 
WFUS54 KLIX 161434
TORLIX
LAC075-161445-
/O.NEW.KLIX.TO.W.0018.210416T1434Z-210416T1445Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
934 AM CDT Fri Apr 16 2021

The National Weather Service in New Orleans has issued a

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

* Until 945 AM CDT.
    
* At 934 AM CDT, a severe thunderstorm capable of producing a tornado
  was located over Venice, or 27 miles southeast of Port Sulphur,
  moving east at 35 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 Plaquemines Parish, including the following
  locations... Boothville Asos.

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.

&&

LAT...LON 2914 8922 2910 8924 2913 8930 2919 8934
      2914 8933 2920 8946 2937 8941 2931 8926
      2934 8920 2929 8914 2930 8918 2927 8921
      2922 8911 2917 8916 2915 8913 2915 8924
      2912 8914 2911 8918 2907 8916
TIME...MOT...LOC 1434Z 286DEG 31KT 2927 8936 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

PG

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 9:06 PM CDT	River Flood Advisory	LIX	Tangipahoa	39 hr
Apr 16, 4:21 AM CDT	Special Weather Statement	LIX	Iberville, Pointe Coupee, West Baton Rouge	39 min
Apr 16, 4:56 AM CDT	Special Weather Statement	LIX	East Baton Rouge, Iberville, Pointe Coupee, West Baton Rouge	64 min
Apr 16, 5:23 AM CDT	Special Weather Statement	LIX	Ascension, East Baton Rouge, Iberville, Livingston, Saint James, West Baton Rouge	37 min
Apr 16, 5:45 AM CDT	Special Weather Statement	LIX	Ascension, Livingston, Saint James, Saint John the Baptist	30 min
Apr 16, 5:49 AM CDT	Special Marine Warning	LIX		56 min
Apr 16, 6:12 AM CDT	Special Weather Statement	LIX	Ascension, Assumption, Saint James	48 min
Apr 16, 6:16 AM CDT	Special Weather Statement	LIX	Orleans, Saint John the Baptist, Saint Tammany	44 min
Apr 16, 6:39 AM CDT	Special Marine Warning	LIX		51 min
Apr 16, 6:59 AM CDT	Special Weather Statement	LIX	Orleans	46 min
Apr 16, 7:19 AM CDT	Special Marine Warning	LIX		56 min
Apr 16, 7:51 AM CDT	Special Weather Statement	LIX	Jefferson	24 min
Apr 16, 9:23 AM CDT	Special Weather Statement	LIX	Plaquemines	37 min
Apr 16, 9:50 AM CDT	Special Weather Statement	LIX	Terrebonne	55 min
Apr 16, 9:51 AM CDT	Special Marine Warning	LIX		54 min
Apr 16, 9:54 AM CDT	Special Marine Warning	LIX		66 min
Apr 16, 10:28 AM CDT	Special Marine Warning	LIX		62 min
Apr 16, 10:39 AM CDT	Special Marine Warning	LIX		66 min
Apr 16, 11:24 AM CDT	Special Marine Warning	LIX		66 min
Apr 16, 11:33 AM CDT	Special Marine Warning	LIX		57 min
Apr 16, 12:02 PM CDT	Special Marine Warning	LIX		58 min
Apr 16, 12:25 PM CDT	Special Marine Warning	LIX		65 min
Apr 16, 12:47 PM CDT	Special Marine Warning	LIX		28 min
Apr 16, 1:12 PM CDT	Special Marine Warning	LIX		33 min
Apr 16, 1:25 PM CDT	Special Marine Warning	LIX		50 min

Nearby

Tornado Warnings in Louisiana, 2021 Every tornado warning in 2021 Tornadoes in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.