Alert archive / Mississippi / Tornado Warnings in 2017

Tornado Warning 82, NWS New Orleans, LA

June 21, 2017Hancock County, Mississippi; Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Jun 21, 2017, 7:31 AM CDT for Hancock County, Mississippi; Saint Tammany Parish, Louisiana. It was in force for 29 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
Jun 21, 2017, 7:31 AM CDT (12:31 UTC)
Expired
Jun 21, 2017, 8:00 AM CDT
In force
29 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Saint Tammany Parish, LA, Hancock County, MS

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 20, 10:24 PM CDTTornado WatchSPC12 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.5 hours before the alert went out and 9 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 2017-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 262 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 12:00Z on 2017-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 485 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
262 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
465 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
485 m²/s²
0-3 km storm-relative helicity
506 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.3

Open this sounding in Storm Lab

The text

As transmitted.

796 
WFUS54 KLIX 211231
TORLIX
LAC103-MSC045-211300-
/O.NEW.KLIX.TO.W.0082.170621T1231Z-170621T1300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
731 AM CDT WED JUN 21 2017

The National Weather Service in New Orleans has issued a

* Tornado Warning for...
  Southeastern St. Tammany Parish in southeastern Louisiana...
  Southwestern Hancock County in southern Mississippi...

* Until 800 AM CDT
    
* At 730 AM CDT, a severe thunderstorm capable of producing a tornado
  was located over Pearlington, or 11 miles west of Waveland, moving
  northwest 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. 

* This dangerous storm will be near...
  Stennis Space Center around 750 AM CDT. 
  Pearl River around 800 AM CDT. 

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 3013 8960 3012 8961 3014 8964 3015 8963
      3016 8965 3043 8986 3047 8954 3021 8944
TIME...MOT...LOC 1230Z 153DEG 23KT 3024 8958 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$
2 follow-up statements
959 
WWUS54 KLIX 211249
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
749 AM CDT WED JUN 21 2017

LAC103-MSC045-211300-
/O.CON.KLIX.TO.W.0082.000000T0000Z-170621T1300Z/
St. Tammany LA-Hancock MS-
749 AM CDT WED JUN 21 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 AM CDT FOR EAST
CENTRAL ST. TAMMANY PARISH IN SOUTHEASTERN LOUISIANA AND WEST CENTRAL
HANCOCK COUNTIES...
    
At 748 AM CDT, a severe thunderstorm capable of producing a tornado 
was located near the Pearl River west of Stennis Space Center, or 9 
miles northeast of Slidell, moving northwest at 30 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 in southeastern Louisiana and west
central Hancock Counties.

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 3035 8957 3032 8968 3044 8977 3046 8962
TIME...MOT...LOC 1248Z 152DEG 28KT 3037 8965 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

TD
185 
WWUS54 KLIX 211301
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
801 AM CDT WED JUN 21 2017

LAC103-MSC045-211311-
/O.EXP.KLIX.TO.W.0082.000000T0000Z-170621T1300Z/
St. Tammany LA-Hancock MS-
801 AM CDT WED JUN 21 2017

...THE TORNADO WARNING FOR EAST CENTRAL ST. TAMMANY PARISH IN
SOUTHEASTERN LOUISIANA AND WEST CENTRAL HANCOCK COUNTIES HAS
EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been allowed to expire.

A tornado watch remains in effect until 1000 AM CDT for southeastern
Louisiana...and southern Mississippi.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
New Orleans.

LAT...LON 3035 8957 3032 8968 3044 8977 3046 8962
TIME...MOT...LOC 1301Z 153DEG 23KT 3044 8969 

$$

TD

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 9:21 PM CDTRiver Flood WarningLIXHancock48 hr
Jun 20, 10:09 PM CDTFlash Flood WarningLIXHancock, Harrison6 hr
Jun 21, 3:43 AM CDTFlash Flood WarningLIXHarrison3 hr
Jun 21, 4:59 AM CDTTornado WarningLIXHancock, Harrison31 min
Jun 21, 7:40 AM CDTTornado WarningLIXHancock35 min
Jun 21, 8:11 AM CDTTornado WarningLIXHarrison34 min
Jun 21, 8:12 AM CDTTornado WarningLIXHancock18 min
Jun 21, 8:30 AM CDTTornado WarningLIXHancock, Pearl River34 min
Jun 21, 8:42 AM CDTTornado Warning Tornado observedLIXHarrison33 min
Jun 21, 8:45 AM CDTTornado WarningLIXHancock, Harrison30 min
Jun 21, 9:11 AM CDTTornado WarningLIXHancock, Harrison19 min
Jun 21, 2:35 PM CDTTornado WarningLIXHancock14 min
Jun 21, 3:21 PM CDTSevere Thunderstorm WarningLIXHancock54 min
Jun 21, 3:21 PM CDTTornado WarningLIXHarrison24 min
Jun 21, 4:00 PM CDTCoastal Flood AdvisoryLIX48 hr
Jun 21, 12:56 AM CDTSpecial Marine WarningLIX34 min
Jun 21, 8:05 AM CDTSpecial Marine WarningLIX25 min
Jun 21, 11:23 AM CDTSpecial Marine WarningLIX22 min
Jun 21, 11:25 AM CDTSmall Craft AdvisoryLIX52 hr
Jun 21, 11:33 AM CDTTornado WarningLIXOrleans13 min
Jun 21, 11:40 AM CDTSpecial Marine WarningLIX50 min
Jun 21, 11:56 AM CDTAreal Flood AdvisoryLIXJefferson, Orleans, Plaquemines, Saint Bernard2 hr
Jun 21, 12:53 PM CDTSpecial Marine WarningLIX37 min
Jun 21, 12:53 PM CDTTornado WarningLIXLivingston, Saint John the Baptist, Tangipahoa37 min
Jun 21, 1:26 PM CDTTornado WarningLIXLivingston19 min
Jun 21, 1:33 PM CDTSpecial Weather StatementLIXSaint John the Baptist57 min
Jun 21, 2:11 PM CDTSpecial Marine WarningLIX19 min
Jun 21, 2:38 PM CDTSpecial Marine WarningLIX37 min
Jun 21, 3:06 PM CDTSpecial Marine WarningLIX24 min
Jun 21, 4:44 PM CDTSmall Craft AdvisoryLIX47 hr

Nearby

Tornado Warnings in Mississippi, 2017Tornado Warnings in Louisiana, 2017Every tornado warning in 2017Tornadoes in 2017

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.