Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 26, NWS New Orleans, LA

April 8, 20216 parishes in Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 8, 2021, 12:25 AM CDT for 6 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
Apr 8, 2021, 12:25 AM CDT (05:25 UTC)
Expired
Apr 8, 2021, 12:59 AM CDT
In force
34 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Hail
0.88 in
Wind
60.0 mph

Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 5.4 hours before the alert went out and 138 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.

638 
WUUS54 KLIX 080525
SVRLIX
LAC033-037-077-091-121-125-080630-
/O.NEW.KLIX.SV.W.0026.210408T0525Z-210408T0630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New Orleans LA
1225 AM CDT Thu Apr 8 2021

The National Weather Service in New Orleans has issued a

* Severe Thunderstorm Warning for...
  Northeastern West Baton Rouge Parish in southeastern Louisiana...
  Southwestern St. Helena Parish in southeastern Louisiana...
  Southeastern West Feliciana Parish in southeastern Louisiana...
  Southeastern Pointe Coupee Parish in southeastern Louisiana...
  Southern East Feliciana Parish in southeastern Louisiana...
  East Baton Rouge Parish in southeastern Louisiana...

* Until 130 AM CDT.

* At 1225 AM CDT, a severe thunderstorm was located near New Roads,
  moving east at 35 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Baton Rouge, Zachary, Baker, New Roads, Slaughter, Pride,
  Brownfields, Greenwell Spring, Merrydale and Baton Rouge Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3073 9148 3076 9083 3065 9083 3065 9092
      3062 9094 3062 9095 3058 9099 3056 9097
      3054 9098 3049 9097 3055 9148
TIME...MOT...LOC 0525Z 270DEG 32KT 3065 9136 

HAIL...0.88IN
WIND...60MPH
 
$$
1 follow-up statement
027 
WWUS54 KLIX 080559
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
1259 AM CDT Thu Apr 8 2021

LAC033-037-077-091-121-125-080608-
/O.CAN.KLIX.SV.W.0026.000000T0000Z-210408T0630Z/
West Baton Rouge LA-St. Helena LA-West Feliciana LA-Pointe Coupee LA-
East Feliciana LA-East Baton Rouge LA-
1259 AM CDT Thu Apr 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WEST BATON
ROUGE...SOUTHWESTERN ST. HELENA...SOUTHEASTERN WEST FELICIANA...
SOUTHEASTERN POINTE COUPEE...SOUTHERN EAST FELICIANA AND EAST BATON
ROUGE PARISHES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has 
weakened. Therefore, the warning has been cancelled.

LAT...LON 3073 9148 3076 9083 3065 9083 3065 9092
      3062 9094 3062 9095 3058 9099 3056 9097
      3054 9098 3049 9097 3055 9148
TIME...MOT...LOC 0557Z 270DEG 32KT 3065 9101 

$$

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, 12:39 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, 2:56 AM CDTTornado WarningLIXSaint Tammany34 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

Nearby

Severe Thunderstorm Warnings in Louisiana, 2021Every 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.