Alert archive / Louisiana / Tornado Watches in 2014

Tornado Watch 536

October 13, 201416 parishes in Louisiana; 8 counties in Texas

The Storm Prediction Center issued this tornado watch at Oct 13, 2014, 11:10 AM CDT for 16 parishes in Louisiana; 8 counties in Texas. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Oct 13, 2014, 11:10 AM CDT (16:10 UTC)
Expired
Oct 13, 2014, 6:46 PM CDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 24 counties

Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Chambers County, TX, Hardin County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Newton County, TX, Orange County, TX, Tyler County, TX

The radar

The Lake Charles radar (KLCH), 58 km from the middle of the area, began a volume at 16:10 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
20%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Oct 13, 11:38 AM CDTSevere Thunderstorm WarningLCHRapides, Vernon52 min
Oct 13, 11:50 AM CDTSevere Thunderstorm WarningLCHJasper, Newton, Tyler55 min
Oct 13, 12:28 PM CDTSevere Thunderstorm WarningLCHAllen, Beauregard, Calcasieu, Vernon62 min
Oct 13, 12:46 PM CDTSevere Thunderstorm WarningLCHRapides, Vernon59 min
Oct 13, 1:18 PM CDTSevere Thunderstorm WarningLCHAllen, Evangeline57 min
Oct 13, 1:27 PM CDTSevere Thunderstorm WarningLCHCalcasieu, Jefferson Davis63 min
Oct 13, 1:37 PM CDTSevere Thunderstorm WarningLCHAvoyelles, Rapides53 min
Oct 13, 2:06 PM CDTSevere Thunderstorm WarningLCHSaint Landry, Saint Martin54 min
Oct 13, 3:06 PM CDTSevere Thunderstorm WarningLCHIberia, Lafayette, Saint Landry, Saint Martin, Vermilion54 min

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 4.2 hours before the alert went out and 59 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, Lake Charles Mun, LA at 12:00Z on 2014-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2118 joules per kilogram.LCLEL10008507005003002001001 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, Lake Charles Mun, LA at 12:00Z on 2014-10-13The 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
2118 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
741 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
207 m²/s²
Significant tornado parameter
1.4
Supercell composite
7.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

939 
WWUS20 KWNS 131619
SEL6  
SPC WW 131619
LAZ000-TXZ000-CWZ000-140000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 536
NWS STORM PREDICTION CENTER NORMAN OK
1110 AM CDT MON OCT 13 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  SOUTHWEST AND SOUTH CENTRAL LOUISIANA
  SOUTHEAST TEXAS
  COASTAL WATERS

* EFFECTIVE THIS MONDAY MORNING AND EVENING FROM 1110 AM UNTIL
  700 PM CDT.

* PRIMARY THREATS INCLUDE...
  A COUPLE TORNADOES POSSIBLE
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHEAST OF FORT
POLK LOUISIANA TO 40 MILES SOUTHEAST OF PORT ARTHUR TEXAS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU6).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 534...WW 535...

DISCUSSION...TSTMS EXPECTED TO INCREASE OVER WW REGION THROUGH LATE
AFTN IN RESPONSE TO MODERATE SFC HEATING AND ASCENT ON SRN FRINGE OF
SLOWLY PROGRESSIVE OK SHORTWAVE TROUGH. AMPLE /40 + KT/ DEEP SHEAR
ALREADY IN PLACE FOR SUPERCELLS SHOULD SLIGHTLY STRENGTHEN AS TROUGH
CONTINUES EWD...WHILE RICH LOW-LVL MOISTURE INFLOW CONTINUES AHEAD
OF SE TX SQLN. THE STORMS WILL THEREFORE POSE A RISK FOR DMGG
WIND...TORNADOES...AND POSSIBLY MARGINALLY SVR HAIL. WHILE THE
STRONGEST UPDRAFTS SHOULD REMAIN WITHIN THE LINE...PERSISTENT
LOW-LVL CONFLUENCE AND CONSIDERABLE UPR-LVL DIFLUENCE IN
WEAKLY-CAPPED ENVIRONMENT AHEAD OF IT SUGGEST GOOD LIKELIHOOD FOR
DEVELOPMENT OF STORMS E/SE OF THE LINE. THESE...TOO...MAY POSE A
RISK FOR DMGG WIND AND TORNADOES...AND COULD REQUIRE AN ADDITIONAL
WATCH FARTHER E LATER TODAY.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24035.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 12, 8:04 PM CDTMesoscale DiscussionSPCEast Carroll, Morehouse, West Carroll86 min
Oct 13, 2:43 AM CDTMesoscale DiscussionSPCBossier, Caddo, De Soto, Webster92 min
Oct 13, 3:22 AM CDTTornado WatchSPCBossier, Caddo, De Soto, Webster8 hr
Oct 13, 6:34 AM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Caldwell, Catahoula, Claiborne and 21 more86 min
Oct 13, 7:08 AM CDTTornado WatchSPCBienville, Caldwell, Catahoula, Claiborne, Concordia, East Carroll and 16 more7 hr
Oct 13, 10:20 AM CDTMesoscale DiscussionSPCBienville, Caldwell, Catahoula, Concordia, East Carroll, Franklin and 14 more115 min
Oct 13, 11:52 AM CDTMesoscale DiscussionSPCEast Carroll, Franklin, Madison, Richland, Tensas, West Carroll113 min
Oct 13, 12:57 PM CDTTornado WatchSPCCatahoula, Concordia, East Carroll, Franklin, Madison, Tensas7 hr
Oct 13, 1:39 PM CDTTornado WatchSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 16 more8 hr
Oct 13, 5:45 PM CDTMesoscale DiscussionSPCJefferson, Lafourche, Orleans, Saint Charles, Saint James, Saint John the Baptist and 4 more90 min
Oct 12, 7:45 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Borden, Brown, Callahan, Clay and 31 more7 hr
Oct 12, 9:47 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Fisher, Foard, Haskell and 10 more58 min
Oct 12, 10:17 PM CDTMesoscale DiscussionSPCCollin, Cooke, Dallas, Delta, Denton, Ellis and 20 more58 min
Oct 12, 11:08 PM CDTTornado WatchSPCBosque, Collin, Comanche, Cooke, Coryell, Dallas and 29 more7 hr
Oct 13, 1:59 AM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Comanche, Concho and 17 more91 min

Nearby

Tornado Watches in Louisiana, 2014Tornado Watches in Texas, 2014Every tornado watch in 2014

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; radar from the NEXRAD Level II archive.