Alert archive / Louisiana / Tornado Warnings in 2021

Tornado Warning 63, NWS New Orleans, LA

September 15, 2021Orleans Parish, Saint Bernard Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Sep 15, 2021, 4:09 AM CDT for Orleans Parish, Saint Bernard Parish, Louisiana. It was in force for 13 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: Sep 15, 2021, 4:09 AM CDT (09:09 UTC)
Expired: Sep 15, 2021, 4:22 AM CDT
In force: 13 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Orleans Parish, LA, Saint Bernard Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 9.2 hours before the alert went out and 40 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: 136 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 589 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

691 
WFUS54 KLIX 150909
TORLIX
LAC071-087-150945-
/O.NEW.KLIX.TO.W.0063.210915T0909Z-210915T0945Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
409 AM CDT Wed Sep 15 2021

The National Weather Service in New Orleans has issued a

* Tornado Warning for...
  Northwestern St. Bernard Parish in southeastern Louisiana...
  Central Orleans Parish in southeastern Louisiana...

* Until 445 AM CDT.
    
* At 408 AM CDT, a severe thunderstorm capable of producing a tornado
  was located near Poydras, or 10 miles east of Belle Chasse, moving
  north at 20 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.

* Locations impacted include...
  New Orleans, Chalmette, Violet, Meraux and Poydras. 

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 242 and 244.
 Interstate 510 between mile markers 2 and 3.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or 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!

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
New Orleans.

&&

LAT...LON 2978 8979 2980 8981 2979 8985 2980 8987
      3003 9002 3008 8980 3005 8980 3004 8982
      3002 8984 2998 8985 2994 8984 2993 8978
      2977 8976 2976 8979
TIME...MOT...LOC 0908Z 166DEG 19KT 2983 8983 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

PG

1 follow-up statement

436 
WWUS54 KLIX 150922
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
422 AM CDT Wed Sep 15 2021

LAC071-087-150931-
/O.CAN.KLIX.TO.W.0063.000000T0000Z-210915T0945Z/
St. Bernard LA-Orleans LA-
422 AM CDT Wed Sep 15 2021

...THE TORNADO WARNING FOR NORTHWESTERN ST. BERNARD AND CENTRAL
ORLEANS 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.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
New Orleans.

LAT...LON 2978 8979 2980 8981 2979 8985 2980 8987
      3003 9002 3008 8980 3005 8980 3004 8982
      3002 8984 2998 8985 2994 8984 2993 8978
      2977 8976 2976 8979
TIME...MOT...LOC 0920Z 166DEG 19KT 2990 8985 

$$

PG

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 14, 10:20 PM CDT	Special Weather Statement	LIX	Terrebonne	55 min
Sep 14, 10:38 PM CDT	Tornado Warning	LIX	Terrebonne	37 min
Sep 15, 2:33 AM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	117 min
Sep 15, 3:12 AM CDT	Areal Flood Advisory	LIX	Tangipahoa	2 hr
Sep 15, 3:29 AM CDT	Tornado Warning	LIX	Plaquemines, Saint Bernard	31 min
Sep 15, 4:32 AM CDT	Special Marine Warning	LIX		58 min
Sep 15, 5:21 AM CDT	Flash Flood Warning	LIX	Saint Tammany, Tangipahoa, Washington	3 hr
Sep 15, 6:22 AM CDT	Tornado Warning	LIX	Saint Tammany	23 min
Sep 15, 7:14 AM CDT	Special Marine Warning	LIX		91 min
Sep 15, 7:45 AM CDT	Flash Flood Warning	LIX	Washington	3 hr
Sep 15, 7:55 AM CDT	River Flood Warning	LIX	Saint Tammany	4 days
Sep 15, 7:55 AM CDT	River Flood Warning	LIX	Saint Tammany	49 hr
Sep 15, 8:18 AM CDT	Flash Flood Warning	LIX	Orleans, Saint Tammany, Washington	5 hr
Sep 15, 8:28 AM CDT	Special Marine Warning	LIX		62 min
Sep 15, 8:37 AM CDT	River Flood Warning	LIX	Tangipahoa	28 hr
Sep 15, 8:50 AM CDT	Special Marine Warning	LIX		55 min
Sep 15, 8:59 AM CDT	River Flood Warning	LIX	East Baton Rouge	28 hr
Sep 15, 9:02 AM CDT	River Flood Warning	LIX	Saint Tammany	6 days
Sep 15, 9:04 AM CDT	River Flood Warning	LIX	Saint Helena	4 days
Sep 15, 9:08 AM CDT	River Flood Warning	LIX	Saint Tammany, Washington	5 days
Sep 15, 9:08 AM CDT	River Flood Warning	LIX	Saint Tammany	7 days
Sep 15, 9:59 AM CDT	Special Marine Warning	LIX		61 min
Sep 15, 3:39 PM CDT	River Flood Warning	LIX	Livingston	42 hr
Sep 15, 3:39 PM CDT	River Flood Warning	LIX	Washington	21 hr
Sep 15, 6:13 PM CDT	Areal Flood Advisory	LIX	Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge	3 hr

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; the sounding from the Mesonet's radiosonde archive.