Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 12, NWS New Orleans, LA

March 23, 20215 parishes in Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 23, 2021, 9:42 AM CDT for 5 parishes in Louisiana. It was in force for 34 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: Mar 23, 2021, 9:42 AM CDT (14:42 UTC)
Expired: Mar 23, 2021, 10:16 AM CDT
In force: 34 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties East Baton Rouge Parish, LA, Iberville Parish, LA, Livingston Parish, LA, Pointe Coupee Parish, LA, West Baton Rouge Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 2.7 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-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: 13 J/kg
Mixed-layer CIN: -246 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 0 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 0 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

270 
WUUS54 KLIX 231442
SVRLIX
LAC033-047-063-077-121-231530-
/O.NEW.KLIX.SV.W.0012.210323T1442Z-210323T1530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New Orleans LA
942 AM CDT Tue Mar 23 2021

The National Weather Service in New Orleans has issued a

* Severe Thunderstorm Warning for...
  West Baton Rouge Parish in southeastern Louisiana...
  Southeastern Pointe Coupee Parish in southeastern Louisiana...
  West central Livingston Parish in southeastern Louisiana...
  North central Iberville Parish in southeastern Louisiana...
  East Baton Rouge Parish in southeastern Louisiana...

* Until 1030 AM CDT.

* At 939 AM CDT, a severe thunderstorm was located over Erwinville,
  or 12 miles south of New Roads, moving east at 40 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Baton Rouge, Zachary, Baker, Denham Springs, Port Allen, Rosedale,
  Grosse Tete, Merrydale, Erwinville, Watson, Pride, Brownfields,
  Greenwell Spring, Westminster, Shenandoah, Inniswold and Baton
  Rouge Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3041 9148 3059 9151 3070 9096 3041 9090
TIME...MOT...LOC 1439Z 260DEG 36KT 3052 9141 

HAIL...0.75IN
WIND...60MPH
 
$$

MSW

2 follow-up statements

256 
WWUS54 KLIX 231514
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
1014 AM CDT Tue Mar 23 2021

LAC047-077-231523-
/O.CAN.KLIX.SV.W.0012.000000T0000Z-210323T1530Z/
Pointe Coupee LA-Iberville LA-
1014 AM CDT Tue Mar 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN POINTE COUPEE AND
NORTH CENTRAL IBERVILLE PARISHES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warning area. Therefore, the warning has been cancelled.

LAT...LON 3043 9122 3066 9118 3070 9096 3041 9090
TIME...MOT...LOC 1513Z 260DEG 36KT 3058 9102 

$$

LAC033-063-121-231530-
/O.CON.KLIX.SV.W.0012.000000T0000Z-210323T1530Z/
West Baton Rouge LA-Livingston LA-East Baton Rouge LA-
1014 AM CDT Tue Mar 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM CDT
FOR EAST CENTRAL WEST BATON ROUGE...WEST CENTRAL LIVINGSTON AND
CENTRAL EAST BATON ROUGE PARISHES...

At 1013 AM CDT, a severe thunderstorm was located over Greenwell
Spring, or 7 miles northwest of Denham Springs, moving east at 40
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Baton Rouge, Zachary, Baker, Denham Springs, Port Allen, Pride,
Merrydale, Watson, Brownfields, Greenwell Spring, Shenandoah and
Baton Rouge Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3043 9122 3066 9118 3070 9096 3041 9090
TIME...MOT...LOC 1513Z 260DEG 36KT 3058 9102 

HAIL...<.75IN
WIND...60MPH
 
$$

MSW

299 
WWUS54 KLIX 231516
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
1016 AM CDT Tue Mar 23 2021

LAC033-063-121-231525-
/O.CAN.KLIX.SV.W.0012.000000T0000Z-210323T1530Z/
West Baton Rouge LA-Livingston LA-East Baton Rouge LA-
1016 AM CDT Tue Mar 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WEST BATON
ROUGE...WEST CENTRAL LIVINGSTON AND CENTRAL EAST BATON ROUGE PARISHES
IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3043 9122 3066 9118 3070 9096 3041 9090
TIME...MOT...LOC 1514Z 260DEG 36KT 3058 9099 

$$

MSW

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 23, 3:57 AM CDT	Wind Advisory	LIX	Saint Bernard, Saint John the Baptist	11 hr
Mar 23, 6:24 AM CDT	Special Weather Statement	LIX	Pointe Coupee, West Feliciana	66 min
Mar 23, 6:40 AM CDT	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	35 min
Mar 23, 7:09 AM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, Pointe Coupee, West Feliciana	51 min
Mar 23, 7:47 AM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, West Feliciana	43 min
Mar 23, 8:00 AM CDT	Special Weather Statement	LIX	Pointe Coupee	30 min
Mar 23, 8:33 AM CDT	Special Weather Statement	LIX	West Feliciana	27 min
Mar 23, 9:00 AM CDT	Special Weather Statement	LIX	East Feliciana	30 min
Mar 23, 9:11 AM CDT	Special Weather Statement	LIX	Pointe Coupee	34 min
Mar 23, 9:29 AM CDT	Special Weather Statement	LIX	Saint Helena	31 min
Mar 23, 10:41 AM CDT	River Flood Warning	LIX	Saint Tammany	65 days
Mar 23, 10:41 AM CDT	River Flood Warning	LIX	Saint Tammany	7 days
Mar 23, 10:51 AM CDT	River Flood Warning	LIX	Saint Helena	62 hr
Mar 23, 10:54 AM CDT	River Flood Warning	LIX	Tangipahoa	6 days
Mar 23, 10:57 AM CDT	River Flood Warning	LIX	Saint Tammany	4 days
Mar 23, 11:01 AM CDT	River Flood Warning	LIX	Saint Tammany	4 days
Mar 23, 11:22 AM CDT	Special Weather Statement	LIX	Assumption	23 min
Mar 23, 11:25 AM CDT	Special Weather Statement	LIX	Saint Tammany	35 min
Mar 23, 11:39 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	51 min
Mar 23, 11:46 AM CDT	River Flood Warning	LIX	East Baton Rouge, West Baton Rouge	35 days
Mar 23, 11:49 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	41 min
Mar 23, 12:06 PM CDT	Special Marine Warning	LIX		54 min
Mar 23, 12:47 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Saint Bernard	3 hr
Mar 23, 12:55 PM CDT	Areal Flood Advisory	LIX	Saint Tammany	3 hr
Mar 23, 1:08 PM CDT	Flash Flood Warning	LIX	Jefferson, Orleans	2 hr
Mar 23, 1:18 PM CDT	Flash Flood Warning	LIX	Saint Bernard	2 hr
Mar 23, 1:20 PM CDT	Special Marine Warning	LIX		85 min
Mar 23, 1:48 PM CDT	Areal Flood Advisory	LIX	Jefferson, Saint Charles	3 hr
Mar 23, 2:38 PM CDT	Special Marine Warning	LIX		97 min
Mar 23, 3:25 PM CDT	Areal Flood Advisory	LIX	Lafourche	3 hr
Mar 23, 3:27 PM CDT	Areal Flood Advisory	LIX	Lafourche, Terrebonne	3 hr
Mar 23, 3:38 PM CDT	Areal Flood Advisory	LIX	Lafourche, Terrebonne	3 hr
Mar 23, 4:05 PM CDT	Flash Flood Warning	LIX	Lafourche, Terrebonne	9 hr
Mar 23, 4:09 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Saint Bernard	3 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 2021 Every severe thunderstorm warning 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.