Alert archive / Mississippi / Tornado Warnings in 2017

Tornado Warning 113, NWS New Orleans, LA

October 22, 2017Amite County, Mississippi; Saint Helena Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Oct 22, 2017, 4:24 AM CDT for Amite County, Mississippi; Saint Helena Parish, Louisiana. It was in force for 51 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
Oct 22, 2017, 4:24 AM CDT (09:24 UTC)
Expired
Oct 22, 2017, 5:15 AM CDT
In force
51 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Saint Helena Parish, LA, Amite County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 9.4 hours before the alert went out and 122 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 2017-10-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1538 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 2017-10-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
1538 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
684 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted.

281 
WFUS54 KLIX 220924
TORLIX
LAC091-MSC005-221015-
/O.NEW.KLIX.TO.W.0113.171022T0924Z-171022T1015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
424 AM CDT SUN OCT 22 2017

The National Weather Service in New Orleans has issued a

* Tornado Warning for...
  Northeastern St. Helena Parish in southeastern Louisiana...
  Southeastern Amite County in southern Mississippi...

* Until 515 AM CDT
    
* At 424 AM CDT, a severe thunderstorm capable of producing a tornado
  was located near Gillsberg, or 10 miles north of Greensburg, moving
  northeast at 10 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
  northeastern St. Helena Parish in southeastern Louisiana and
  southeastern Amite 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 3119 9055 3100 9055 3100 9057 3098 9057
      3087 9067 3098 9074
TIME...MOT...LOC 0924Z 232DEG 8KT 3098 9064 

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

$$

CAB
1 follow-up statement
510 
WWUS54 KLIX 220944
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
444 AM CDT SUN OCT 22 2017

LAC091-220953-
/O.CAN.KLIX.TO.W.0113.000000T0000Z-171022T1015Z/
St. Helena LA-
444 AM CDT SUN OCT 22 2017

...THE TORNADO WARNING FOR NORTHEASTERN ST. HELENA PARISH IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 3119 9055 3100 9055 3100 9069
TIME...MOT...LOC 0943Z 206DEG 16KT 3102 9059 

$$

MSC005-221015-
/O.CON.KLIX.TO.W.0113.000000T0000Z-171022T1015Z/
Amite MS-
444 AM CDT SUN OCT 22 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 AM CDT FOR
SOUTHEASTERN AMITE COUNTY...
    
At 443 AM CDT, a severe thunderstorm capable of producing a tornado
was located near Gillsberg, or 14 miles north of Greensburg, moving
northeast at 20 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. 

Locations impacted include...
Gillsberg.

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 3119 9055 3100 9055 3100 9069
TIME...MOT...LOC 0943Z 206DEG 16KT 3102 9059 

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

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 21, 8:45 PM CDTFlash Flood WatchLIXAmite, Wilkinson19 hr
Oct 22, 1:07 AM CDTSpecial Weather StatementLIXWilkinson53 min
Oct 22, 2:00 AM CDTFlash Flood WarningLIXWilkinson3 hr
Oct 22, 2:09 AM CDTSpecial Weather StatementLIXAmite51 min
Oct 22, 2:27 AM CDTSpecial Weather StatementLIXAmite48 min
Oct 22, 2:33 AM CDTSevere Thunderstorm WarningLIXAmite42 min
Oct 22, 3:04 AM CDTSpecial Weather StatementLIXAmite26 min
Oct 22, 3:31 AM CDTAreal Flood AdvisoryLIXAmite119 min
Oct 22, 3:52 AM CDTSpecial Weather StatementLIXAmite53 min
Oct 22, 4:59 AM CDTSevere Thunderstorm WarningLIXPike61 min
Oct 22, 5:20 AM CDTFlash Flood WarningLIXAmite115 min
Oct 22, 5:26 AM CDTTornado WarningLIXPike34 min
Oct 22, 7:31 AM CDTSpecial Weather StatementLIXHancock, Pearl River29 min
Oct 22, 7:37 AM CDTTornado WarningLIXHancock, Harrison23 min
Oct 22, 7:41 AM CDTSpecial Weather StatementLIXHarrison34 min
Oct 22, 7:54 AM CDTTornado WarningLIXHarrison20 min
Oct 22, 8:41 AM CDTTornado WarningLIXHarrison49 min
Oct 22, 9:09 AM CDTSpecial Weather StatementLIXHancock36 min
Oct 22, 9:26 AM CDTFlash Flood WarningLIXHancock, Harrison3 hr
Oct 22, 9:38 AM CDTSpecial Weather StatementLIXAmite82 min
Oct 22, 9:58 AM CDTSpecial Weather StatementLIXHarrison32 min
Oct 22, 10:15 AM CDTSpecial Weather StatementLIXPike75 min
Oct 22, 10:52 AM CDTFlash Flood WarningLIXJackson3 hr
Oct 22, 11:07 AM CDTSpecial Weather StatementLIXWalthall23 min
Oct 22, 11:19 AM CDTTornado WarningLIXJackson10 min
Oct 22, 11:57 AM CDTSevere Thunderstorm WarningLIXHancock, Pearl River48 min
Oct 22, 12:08 PM CDTTornado WarningLIXJackson11 min
Oct 22, 12:38 PM CDTRiver Flood WarningLIXHarrison48 hr
Oct 22, 12:38 PM CDTRiver Flood WarningLIXHarrison30 hr
Oct 22, 1:02 PM CDTSpecial Weather StatementLIXHarrison, Jackson28 min
Oct 22, 1:45 PM CDTSpecial Weather StatementLIXHarrison, Jackson60 min
Oct 22, 3:41 PM CDTAreal Flood AdvisoryLIXJackson64 min
Oct 21, 8:05 PM CDTAreal Flood AdvisoryLIXIberville, Pointe Coupee, West Baton Rouge3 hr
Oct 21, 10:24 PM CDTTornado WarningLIXEast Baton Rouge, East Feliciana16 min
Oct 21, 11:08 PM CDTSpecial Weather StatementLIXEast Feliciana37 min
Oct 21, 11:24 PM CDTAreal Flood AdvisoryLIXEast Feliciana, Pointe Coupee, West Feliciana2 hr
Oct 22, 1:26 AM CDTFlash Flood WarningLIXEast Feliciana, West Feliciana3 hr
Oct 22, 1:46 AM CDTSevere Thunderstorm WarningLIXEast Feliciana29 min
Oct 22, 4:00 AM CDTFlash Flood WarningLIXEast Feliciana3 hr
Oct 22, 7:27 AM CDTAreal Flood WarningLIXEast Feliciana, West Feliciana6 hr
Oct 22, 7:40 AM CDTSpecial Marine WarningLIX35 min
Oct 22, 8:14 AM CDTSpecial Marine WarningLIX61 min
Oct 22, 8:26 AM CDTSpecial Weather StatementLIXOrleans34 min
Oct 22, 9:12 AM CDTSpecial Marine WarningLIX48 min
Oct 22, 9:55 AM CDTSpecial Marine WarningLIX65 min
Oct 22, 10:44 AM CDTAreal Flood WarningLIXPointe Coupee3 hr
Oct 22, 10:48 AM CDTSpecial Marine WarningLIX87 min
Oct 22, 10:58 AM CDTSpecial Marine WarningLIX92 min
Oct 22, 11:26 AM CDTSevere Thunderstorm WarningLIXJefferson, Saint Charles, Saint John the Baptist51 min
Oct 22, 12:02 PM CDTSevere Thunderstorm WarningLIXJefferson, Lafourche, Plaquemines, Saint Bernard, Saint Charles28 min
Oct 22, 12:11 PM CDTSevere Thunderstorm WarningLIXJefferson, Lafourche, Plaquemines, Terrebonne64 min
Oct 22, 12:16 PM CDTSpecial Marine WarningLIX89 min
Oct 22, 12:30 PM CDTSpecial Marine WarningLIX90 min
Oct 22, 12:37 PM CDTSevere Thunderstorm WarningLIXPlaquemines, Saint Bernard23 min
Oct 22, 12:47 PM CDTSpecial Marine WarningLIX88 min
Oct 22, 1:46 PM CDTSpecial Marine WarningLIX89 min
Oct 22, 2:11 PM CDTSpecial Marine WarningLIX2 hr
Oct 22, 2:48 PM CDTSpecial Marine WarningLIX117 min
Oct 22, 2:50 PM CDTSpecial Marine WarningLIX115 min
Oct 22, 3:20 PM CDTSpecial Marine WarningLIX85 min
Oct 22, 3:46 PM CDTSmall Craft AdvisoryLIX26 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.