Alert archive / Mississippi / Tornado Warnings in 2021

Tornado Warning 64, NWS New Orleans, LA

September 15, 2021Saint Tammany Parish, Louisiana; Hancock County, Pearl River County, Mississippi

NWS New Orleans, LA issued this tornado warning at Sep 15, 2021, 6:22 AM CDT for Saint Tammany Parish, Louisiana; Hancock County, Pearl River County, Mississippi. It was in force for 23 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
Sep 15, 2021, 6:22 AM CDT (11:22 UTC)
Expired
Sep 15, 2021, 6:45 AM CDT
In force
23 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 11.4 hours before the alert went out and 19 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 2021-09-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 136 joules per kilogram.LCLLFCEL10008507005003002001001 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 2021-09-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
136 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
589 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
181 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

955 
WFUS54 KLIX 151122
TORLIX
LAC103-MSC045-109-151145-
/O.NEW.KLIX.TO.W.0064.210915T1122Z-210915T1145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
622 AM CDT Wed Sep 15 2021

The National Weather Service in New Orleans has issued a

* Tornado Warning for...
  East central St. Tammany Parish in southeastern Louisiana...
  West central Hancock County in southern Mississippi...
  Southern Pearl River County in southern Mississippi...

* Until 645 AM CDT.
    
* At 621 AM CDT, a severe thunderstorm capable of producing a tornado
  was located over Stennis Space Center, or 11 miles south of
  Picayune, moving northwest at 15 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
  east central St. Tammany Parish, west central Hancock and southern
  Pearl River Counties.

This includes the following Interstates...
 Interstate 59 in Louisiana between mile markers 10 and 11.
 Interstate 59 in Mississippi between mile markers 1 and 3.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or 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 3034 8954 3031 8963 3047 8974 3054 8960
TIME...MOT...LOC 1121Z 149DEG 13KT 3037 8962 

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

$$
1 follow-up statement
461 
WWUS54 KLIX 151136
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
636 AM CDT Wed Sep 15 2021

LAC103-MSC045-109-151146-
/O.EXP.KLIX.TO.W.0064.000000T0000Z-210915T1145Z/
St. Tammany LA-Hancock MS-Pearl River MS-
636 AM CDT Wed Sep 15 2021

...THE TORNADO WARNING FOR EAST CENTRAL ST. TAMMANY PARISH...WEST
CENTRAL HANCOCK AND SOUTHERN PEARL RIVER COUNTIES WILL EXPIRE AT 645
AM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.

LAT...LON 3034 8954 3031 8963 3047 8974 3054 8960
TIME...MOT...LOC 1136Z 149DEG 13KT 3041 8965 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 14, 10:20 PM CDTSpecial Weather StatementLIXTerrebonne55 min
Sep 14, 10:38 PM CDTTornado WarningLIXTerrebonne37 min
Sep 15, 2:33 AM CDTAreal Flood AdvisoryLIXJefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles117 min
Sep 15, 3:12 AM CDTAreal Flood AdvisoryLIXTangipahoa2 hr
Sep 15, 3:29 AM CDTTornado WarningLIXPlaquemines, Saint Bernard31 min
Sep 15, 4:09 AM CDTTornado WarningLIXOrleans, Saint Bernard13 min
Sep 15, 4:32 AM CDTSpecial Marine WarningLIX58 min
Sep 15, 5:21 AM CDTFlash Flood WarningLIXSaint Tammany, Tangipahoa, Washington3 hr
Sep 15, 7:14 AM CDTSpecial Marine WarningLIX91 min
Sep 15, 7:45 AM CDTFlash Flood WarningLIXWashington3 hr
Sep 15, 7:55 AM CDTRiver Flood WarningLIXSaint Tammany4 days
Sep 15, 7:55 AM CDTRiver Flood WarningLIXSaint Tammany49 hr
Sep 15, 8:18 AM CDTFlash Flood WarningLIXOrleans, Saint Tammany, Washington5 hr
Sep 15, 8:28 AM CDTSpecial Marine WarningLIX62 min
Sep 15, 8:37 AM CDTRiver Flood WarningLIXTangipahoa28 hr
Sep 15, 8:50 AM CDTSpecial Marine WarningLIX55 min
Sep 15, 8:59 AM CDTRiver Flood WarningLIXEast Baton Rouge28 hr
Sep 15, 9:02 AM CDTRiver Flood WarningLIXSaint Tammany6 days
Sep 15, 9:04 AM CDTRiver Flood WarningLIXSaint Helena4 days
Sep 15, 9:08 AM CDTRiver Flood WarningLIXSaint Tammany, Washington5 days
Sep 15, 9:08 AM CDTRiver Flood WarningLIXSaint Tammany7 days
Sep 15, 9:59 AM CDTSpecial Marine WarningLIX61 min
Sep 15, 3:39 PM CDTRiver Flood WarningLIXLivingston42 hr
Sep 15, 3:39 PM CDTRiver Flood WarningLIXWashington21 hr
Sep 15, 6:13 PM CDTAreal Flood AdvisoryLIXAscension, East Baton Rouge, Iberville, Livingston, West Baton Rouge3 hr
Sep 15, 6:19 AM CDTAreal Flood AdvisoryLIXHancock, Harrison, Pearl River45 min
Sep 15, 7:04 AM CDTFlash Flood WarningLIXHancock, Pearl River3 hr
Sep 15, 8:11 AM CDTFlash Flood Warning Considerable damage threatLIXHarrison5 hr
Sep 15, 8:22 AM CDTFlash Flood WarningLIXJackson6 hr
Sep 15, 8:37 AM CDTRiver Flood WarningLIXPike37 hr
Sep 15, 8:52 AM CDTRiver Flood WarningLIXHancock28 hr
Sep 15, 8:52 AM CDTRiver Flood WarningLIXHarrison43 hr
Sep 15, 9:02 AM CDTRiver Flood WarningLIXPike, Walthall46 hr

Nearby

Tornado Warnings in Mississippi, 2021Tornado Warnings in Louisiana, 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.