Alert archive / Louisiana / Tornado Warnings in 2021

Tornado Warning 10, NWS New Orleans, LA

April 8, 2021Saint Tammany Parish, Louisiana; Pearl River County, Mississippi

NWS New Orleans, LA issued this tornado warning at Apr 8, 2021, 2:56 AM CDT for Saint Tammany Parish, Louisiana; Pearl River County, Mississippi. 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
Apr 8, 2021, 2:56 AM CDT (07:56 UTC)
Expired
Apr 8, 2021, 3:30 AM CDT
In force
34 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Saint Tammany Parish, LA, Pearl River County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 7.9 hours before the alert went out and 15 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 2021-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1186 joules per kilogram.LCLEL10008507005003002001001 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 2021-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 147 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
1186 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
722 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
0.9
Supercell composite
5.8

Open this sounding in Storm Lab

The text

As transmitted.

955 
WFUS54 KLIX 080756
TORLIX
LAC103-MSC109-080830-
/O.NEW.KLIX.TO.W.0010.210408T0756Z-210408T0830Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
256 AM CDT Thu Apr 8 2021

The National Weather Service in New Orleans has issued a

* Tornado Warning for...
  Southeastern St. Tammany Parish in southeastern Louisiana...
  South central Pearl River County in southern Mississippi...

* Until 330 AM CDT.
    
* At 255 AM CDT, a severe thunderstorm capable of producing a tornado
  was located over Lacombe, or 7 miles northwest of Slidell, 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 dangerous storm will be near...
  Slidell around 305 AM CDT.
  Pearl River around 315 AM CDT.

Other locations impacted by this tornadic thunderstorm include
Slidell Airport.

People attending St Tammany Festival Test should seek safe shelter
immediately!

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 3052 8955 3050 8964 3046 8965 3046 8969
      3036 8966 3034 8963 3029 8964 3023 8962
      3025 8987 3026 8989 3025 8993 3041 8997
      3054 8954
TIME...MOT...LOC 0755Z 255DEG 32KT 3034 8990 

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

$$
2 follow-up statements
799 
WWUS54 KLIX 080809
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
309 AM CDT Thu Apr 8 2021

LAC103-MSC109-080830-
/O.CON.KLIX.TO.W.0010.000000T0000Z-210408T0830Z/
St. Tammany LA-Pearl River MS-
309 AM CDT Thu Apr 8 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 AM CDT FOR
SOUTHEASTERN ST. TAMMANY PARISH IN SOUTHEASTERN LOUISIANA AND SOUTH
CENTRAL PEARL RIVER COUNTIES...
    
At 309 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Pearl River, or near Slidell, 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 St. Tammany Parish in southeastern Louisiana and south
central Pearl River Counties, including the following locations...
Slidell Airport.

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 3052 8955 3050 8964 3046 8965 3046 8969
      3036 8966 3034 8963 3029 8964 3023 8962
      3024 8979 3044 8988 3054 8954
TIME...MOT...LOC 0809Z 255DEG 32KT 3037 8976 

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

$$
324 
WWUS54 KLIX 080818
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
318 AM CDT Thu Apr 8 2021

LAC103-MSC109-080830-
/O.CON.KLIX.TO.W.0010.000000T0000Z-210408T0830Z/
St. Tammany LA-Pearl River MS-
318 AM CDT Thu Apr 8 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 AM CDT FOR
SOUTHEASTERN ST. TAMMANY PARISH IN SOUTHEASTERN LOUISIANA AND SOUTH
CENTRAL PEARL RIVER COUNTIES...
    
At 318 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Pearl River, or 7 miles northeast of Slidell, moving
east 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.

Locations impacted include...
Slidell and Pearl River. 

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 3052 8955 3050 8964 3046 8965 3046 8969
      3036 8966 3034 8963 3029 8964 3026 8963
      3026 8972 3045 8982 3054 8954
TIME...MOT...LOC 0818Z 254DEG 22KT 3037 8971 

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

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 9:42 PM CDTSevere Thunderstorm WarningLIXPointe Coupee, West Feliciana78 min
Apr 7, 10:22 PM CDTTornado WarningLIXWest Feliciana53 min
Apr 7, 10:50 PM CDTSevere Thunderstorm WarningLIXEast Feliciana, West Feliciana70 min
Apr 8, 12:08 AM CDTSevere Thunderstorm WarningLIXEast Feliciana, Saint Helena67 min
Apr 8, 12:25 AM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, East Feliciana, Pointe Coupee, Saint Helena, West Baton Rouge, West Feliciana34 min
Apr 8, 12:39 AM CDTSevere Thunderstorm WarningLIXSaint Helena, Tangipahoa, Washington66 min
Apr 8, 1:05 AM CDTSevere Thunderstorm WarningLIXSaint Tammany, Tangipahoa, Washington55 min
Apr 8, 1:12 AM CDTTornado WarningLIXTangipahoa, Washington33 min
Apr 8, 1:20 AM CDTTornado WarningLIXLivingston, Saint Helena25 min
Apr 8, 1:51 AM CDTSevere Thunderstorm WarningLIXLivingston, Saint John the Baptist, Tangipahoa39 min
Apr 8, 2:00 AM CDTSpecial Marine WarningLIX30 min
Apr 8, 2:04 AM CDTSpecial Weather StatementLIXSaint Tammany56 min
Apr 8, 2:14 AM CDTSpecial Marine WarningLIX61 min
Apr 8, 2:24 AM CDTSevere Thunderstorm WarningLIXSaint Tammany51 min
Apr 8, 2:30 AM CDTTornado WarningLIXSaint Tammany30 min
Apr 8, 2:54 AM CDTSpecial Weather StatementLIXOrleans, Saint Charles66 min
Apr 8, 3:03 AM CDTTornado WarningLIXSaint Charles, Saint John the Baptist14 min
Apr 8, 3:28 AM CDTSpecial Marine WarningLIX62 min
Apr 8, 3:42 AM CDTFlash Flood WarningLIXJefferson, Orleans, Saint Charles5 hr
Apr 8, 4:00 AM CDTTornado WarningLIXJefferson12 min
Apr 8, 4:15 AM CDTSpecial Weather StatementLIXJefferson, Lafourche60 min
Apr 8, 4:22 AM CDTTornado WarningLIXJefferson23 min
Apr 8, 4:31 AM CDTSpecial Marine WarningLIX89 min
Apr 8, 5:14 AM CDTSpecial Weather StatementLIXJefferson, Plaquemines, Terrebonne61 min
Apr 8, 5:19 AM CDTSpecial Marine WarningLIX56 min
Apr 8, 5:45 AM CDTSpecial Marine WarningLIX2 hr
Apr 8, 6:11 AM CDTSevere Thunderstorm WarningLIXPlaquemines34 min
Apr 8, 6:15 AM CDTSpecial Marine WarningLIX2 hr
Apr 8, 7:42 AM CDTSpecial Marine WarningLIX63 min
Apr 8, 9:55 AM CDTRiver Flood WarningLIXTangipahoa12 days
Apr 8, 9:58 AM CDTRiver Flood WarningLIXSaint Tammany4 days
Apr 8, 10:10 AM CDTRiver Flood WarningLIXAscension12 days
Apr 7, 11:12 PM CDTTornado WarningLIXWilkinson28 min
Apr 8, 3:13 AM CDTSpecial Weather StatementLIXHancock, Harrison62 min
Apr 8, 3:24 AM CDTTornado WarningLIXHancock36 min

Nearby

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