Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 116, NWS New Orleans, LA

June 13, 2021Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jun 13, 2021, 4:03 PM CDT for Saint Tammany Parish, Louisiana. It was in force for 42 min. 1 report 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
Jun 13, 2021, 4:03 PM CDT (21:03 UTC)
Expired
Jun 13, 2021, 4:45 PM CDT
In force
42 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Saint Tammany Parish, LA

What was reported inside it

TimeReportWhereRemark
Jun 13, 4:25 PM CDTHAIL 11 Wsw Lacombe, LAHAIL NEAR 1 INCH (SOME STONES WERE SLIGHTLY LARGER) REPORTED IN LACOMBE. RELAYED VIA SOCIAL MEDIA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 13, 12:22 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.1 hours before the alert went out and 21 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 12:00Z on 2021-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2482 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2021-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.1939Sfc1 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
2482 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
802 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.3

Open this sounding in Storm Lab

The text

As transmitted.

309 
WUUS54 KLIX 132103
SVRLIX
LAC103-132145-
/O.NEW.KLIX.SV.W.0116.210613T2103Z-210613T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New Orleans LA
403 PM CDT Sun Jun 13 2021

The National Weather Service in New Orleans has issued a

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

* Until 445 PM CDT.

* At 403 PM CDT, a severe thunderstorm was located over Lacombe, or 7
  miles west of Slidell, moving south at 10 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Slidell and Lacombe. 

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 261 and 262.
 Interstate 12 between mile markers 69 and 80.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3035 8984 3020 8976 3022 8985 3025 8987
      3026 8990 3025 8993 3026 8995 3026 8998
      3029 8998 3031 9001 3041 9000 3041 8993
TIME...MOT...LOC 2103Z 005DEG 9KT 3029 8990 

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

KLG
2 follow-up statements
072 
WWUS54 KLIX 132130
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
430 PM CDT Sun Jun 13 2021

LAC103-132145-
/O.CON.KLIX.SV.W.0116.000000T0000Z-210613T2145Z/
St. Tammany LA-
430 PM CDT Sun Jun 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR SOUTH CENTRAL ST. TAMMANY PARISH...

At 430 PM CDT, a severe thunderstorm was located near Lacombe, or 8
miles southwest of Slidell, moving south at 10 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Lacombe.

This includes Interstate 12 between mile markers 71 and 76.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3028 8983 3022 8983 3022 8984 3025 8987
      3026 8990 3025 8993 3026 8995 3026 8998
      3029 8998 3031 9001 3038 9000 3038 8994
TIME...MOT...LOC 2130Z 005DEG 9KT 3022 8991 

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

KLG
980 
WWUS54 KLIX 132143
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
443 PM CDT Sun Jun 13 2021

LAC103-132153-
/O.EXP.KLIX.SV.W.0116.000000T0000Z-210613T2145Z/
St. Tammany LA-
443 PM CDT Sun Jun 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL ST. TAMMANY
PARISH WILL EXPIRE AT 445 PM CDT...
                
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 will be allowed to expire.  However gusty 
winds in excess of 40 mph and pea sized hail will still possible 
with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
southeastern Louisiana.

LAT...LON 3028 8983 3022 8983 3022 8984 3025 8987
      3026 8990 3025 8993 3026 8995 3026 8998
      3029 8998 3031 9001 3038 9000 3038 8994
TIME...MOT...LOC 2143Z 005DEG 9KT 3019 8991 

$$

KLG

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 13, 12:12 AM CDTSpecial Marine WarningLIX48 min
Jun 13, 12:58 AM CDTSpecial Marine WarningLIX62 min
Jun 13, 1:43 AM CDTSpecial Marine WarningLIX62 min
Jun 13, 9:38 AM CDTSpecial Marine WarningLIX52 min
Jun 13, 11:34 AM CDTSpecial Marine WarningLIX56 min
Jun 13, 1:04 PM CDTSpecial Weather StatementLIXJefferson41 min
Jun 13, 1:10 PM CDTSpecial Marine WarningLIX65 min
Jun 13, 2:05 PM CDTSpecial Marine WarningLIX55 min
Jun 13, 2:45 PM CDTSpecial Marine WarningLIX45 min
Jun 13, 2:52 PM CDTSpecial Weather StatementLIXSaint Tammany23 min
Jun 13, 3:11 PM CDTSpecial Marine WarningLIX64 min
Jun 13, 4:10 PM CDTSpecial Marine WarningLIX65 min
Jun 13, 4:18 PM CDTSpecial Marine WarningLIX57 min
Jun 13, 4:28 PM CDTSevere Thunderstorm WarningLIXSaint Tammany, Washington32 min
Jun 13, 4:33 PM CDTSpecial Weather StatementLIXSaint Bernard42 min
Jun 13, 4:44 PM CDTSpecial Weather StatementLIXSaint Tammany46 min
Jun 13, 4:55 PM CDTSpecial Weather StatementLIXJefferson35 min
Jun 13, 5:13 PM CDTSpecial Marine WarningLIX62 min
Jun 13, 5:23 PM CDTSpecial Weather StatementLIXWashington52 min
Jun 13, 5:25 PM CDTSpecial Marine WarningLIX35 min
Jun 13, 5:28 PM CDTSpecial Weather StatementLIXPlaquemines62 min
Jun 13, 5:47 PM CDTSpecial Marine WarningLIX58 min
Jun 13, 5:53 PM CDTSevere Thunderstorm WarningLIXWashington65 min
Jun 13, 5:59 PM CDTSpecial Weather StatementLIXTangipahoa31 min
Jun 13, 6:17 PM CDTSpecial Weather StatementLIXTangipahoa28 min
Jun 13, 6:19 PM CDTSpecial Marine WarningLIX56 min
Jun 13, 6:35 PM CDTSevere Thunderstorm WarningLIXSaint Tammany54 min
Jun 13, 6:41 PM CDTSpecial Weather StatementLIXSaint Helena, Tangipahoa64 min
Jun 13, 6:42 PM CDTSpecial Weather StatementLIXLafourche63 min
Jun 13, 6:48 PM CDTSpecial Weather StatementLIXTangipahoa27 min
Jun 13, 6:54 PM CDTSpecial Weather StatementLIXSaint Charles51 min
Jun 13, 6:56 PM CDTSpecial Marine WarningLIX64 min

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.