Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 30, NWS New Orleans, LA

April 8, 2021Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 8, 2021, 2:24 AM CDT for Saint Tammany Parish, Louisiana. It was in force for 51 min. 6 reports 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 8, 2021, 2:24 AM CDT (07:24 UTC)
Expired
Apr 8, 2021, 3:15 AM CDT
In force
51 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Saint Tammany Parish, LA

What was reported inside it

TimeReportWhereRemark
Apr 8, 2:29 AM CDTTSTM WND DMG2 Nnw Madisonville, LACORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2 NNW MADISONVILLE. SCATTERED LIGHT TREE DEBRIS ALONG LA HWY 22. A FEW SNAPPED LIMBS. DIAMETER APPEARS TO BE AROUND 4 INCHES ON SOME OF THE BIGGEST.
Apr 8, 2:29 AM CDTTSTM WND DMG2 Nnw Madisonville, LASCATTERED LIGHT TREE DEBRIS ALONG LA HWY 22. A FEW SNAPPED LIMBS. DIAMETER APPEARS TO BE AROUND 4 INCHES ON SOME OF THE BIGGEST.
Apr 8, 2:30 AM CDTTSTM WND DMG1 W Mandeville, LATREES SNAPPED WITHIN A MILE WEST OF CAUSEWAY BRIDGE.
Apr 8, 2:30 AM CDTTSTM WND DMG2 Nnw Madisonville, LAALMOST ALL BIG LIMBS HAVE ALREADY BEEN PICKED UP BUT A LOT OF LIGHT TREE DEBRIS IN MADISONVILLE OAKS NEIGHBORHOOD.
Apr 8, 2:33 AM CDTTSTM WND DMG2 Ne Madisonville, LAAROUND A DOZEN TREES DOWN IN FAIRVIEW-RIVERSIDE STATE PARK. ALL TREES BLOWN DOWN TO THE E-NE. (THIS IS DAMAGE FROM THE MORNING OF APRIL 8TH).
Apr 8, 2:54 AM CDTTSTM WND DMG2 N Lacombe, LASCATTERED LIGHT TREE DEBRIS.

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 00:00Z, 7.4 hours before the alert went out and 18 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°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.

892 
WUUS54 KLIX 080724
SVRLIX
LAC103-080815-
/O.NEW.KLIX.SV.W.0030.210408T0724Z-210408T0815Z/

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

The National Weather Service in New Orleans has issued a

* Severe Thunderstorm Warning for...
  Southern St. Tammany Parish in southeastern Louisiana...

* Until 315 AM CDT.

* At 224 AM CDT, a severe thunderstorm was located over Madisonville,
  or near Covington, moving east at 40 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Slidell, Covington, Pearl River, Abita Springs, Madisonville,
  Lacombe and Slidell Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3040 8967 3036 8966 3034 8963 3028 8963
      3017 8967 3018 8975 3021 8978 3022 8985
      3025 8987 3026 8998 3030 8999 3037 9010
      3039 9021 3037 9024 3052 9024
TIME...MOT...LOC 0724Z 288DEG 34KT 3042 9020 

HAIL...1.00IN
WIND...60MPH
 
$$

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, 2:30 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.