Alert archive / Louisiana / Tornado Watches in 2014
Tornado Watch 538
The Storm Prediction Center issued this tornado watch at Oct 13, 2014, 1:39 PM CDT for 22 parishes in Louisiana; 13 counties in Mississippi. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 13, 2014, 1:39 PM CDT (18:39 UTC)
- Expired
- Oct 13, 2014, 9:49 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 35 counties
Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Jefferson Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Pointe Coupee Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Terrebonne Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS, Wilkinson County, MS
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
- 10%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 5%
- 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
- 70%
Warnings issued inside it
37 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 13, 2:12 PM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 48 min |
| Oct 13, 2:36 PM CDT | Severe Thunderstorm Warning | MOB | Wayne | 24 min |
| Oct 13, 3:42 PM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge, West Feliciana | 78 min |
| Oct 13, 4:10 PM CDT | Severe Thunderstorm Warning | MOB | Perry | 35 min |
| Oct 13, 4:29 PM CDT | Severe Thunderstorm Warning | LIX | Livingston, Saint Helena | 61 min |
| Oct 13, 4:31 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, Livingston | 59 min |
| Oct 13, 4:41 PM CDT | Tornado Warning | LIX | Harrison | 19 min |
| Oct 13, 4:45 PM CDT | Tornado Warning | LIX | Tangipahoa, Washington | 45 min |
| Oct 13, 4:57 PM CDT | Severe Thunderstorm Warning | LIX | Amite, Pike | 34 min |
| Oct 13, 4:59 PM CDT | Tornado Warning | LIX | Jackson | 16 min |
| Oct 13, 5:05 PM CDT | Tornado Warning | LIX | Saint Charles | 10 min |
| Oct 13, 5:06 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 54 min |
| Oct 13, 5:08 PM CDT | Tornado Warning | LIX | Harrison, Jackson | 22 min |
| Oct 13, 5:14 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, Assumption, Lafourche, Livingston, Saint Charles, Saint James and 1 more | 46 min |
| Oct 13, 5:19 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa, Washington | 23 min |
| Oct 13, 5:21 PM CDT | Tornado Warning | LIX | Jackson | 24 min |
| Oct 13, 5:21 PM CDT | Tornado Warning | LIX | Jackson | 24 min |
| Oct 13, 5:25 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 50 min |
| Oct 13, 5:25 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 50 min |
| Oct 13, 5:26 PM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Lafourche, Saint Charles | 64 min |
| Oct 13, 5:28 PM CDT | Tornado Warning | LIX | Walthall | 17 min |
| Oct 13, 5:33 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 57 min |
| Oct 13, 5:39 PM CDT | Severe Thunderstorm Warning | LIX | Walthall | 36 min |
| Oct 13, 5:46 PM CDT | Severe Thunderstorm Warning | MOB | George, Greene | 17 min |
| Oct 13, 5:50 PM CDT | Severe Thunderstorm Warning | LIX | Washington | 25 min |
| Oct 13, 6:04 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 41 min |
| Oct 13, 6:07 PM CDT | Severe Thunderstorm Warning | LIX | Orleans, Saint Tammany | 38 min |
| Oct 13, 6:17 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 43 min |
| Oct 13, 6:29 PM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Orleans, Saint Bernard | 46 min |
| Oct 13, 6:35 PM CDT | Severe Thunderstorm Warning | LIX | Hancock | 40 min |
| Oct 13, 7:00 PM CDT | Severe Thunderstorm Warning | LIX | Lafourche, Terrebonne | 60 min |
| Oct 13, 7:14 PM CDT | Severe Thunderstorm Warning | MOB | Greene, Perry, Wayne | 61 min |
| Oct 13, 7:18 PM CDT | Tornado Warning | MOB | Greene | 27 min |
| Oct 13, 7:42 PM CDT | Severe Thunderstorm Warning | MOB | George, Greene, Perry, Stone | 48 min |
| Oct 13, 7:54 PM CDT | Severe Thunderstorm Warning | LIX | Harrison, Jackson | 66 min |
| Oct 13, 8:13 PM CDT | Severe Thunderstorm Warning | MOB | Greene, Wayne | 32 min |
| Oct 13, 8:37 PM CDT | Severe Thunderstorm Warning | LIX | Jackson | 68 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.7 hours before the alert went out and 72 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.
- Mixed-layer CAPE
- 2055 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 562 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 204 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 7.3
The text
As transmitted, in the capitals the NWS used until 2016.
112 WWUS20 KWNS 131847 SEL8 SPC WW 131847 LAZ000-MSZ000-CWZ000-140300- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 538 NWS STORM PREDICTION CENTER NORMAN OK 140 PM CDT MON OCT 13 2014 THE NWS STORM PREDICTION CENTER HAS ISSUED A * TORNADO WATCH FOR PORTIONS OF SOUTHEAST LOUISIANA SOUTHERN MISSISSIPPI COASTAL WATERS * EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 140 PM UNTIL 1000 PM CDT. * PRIMARY THREATS INCLUDE... A COUPLE TORNADOES POSSIBLE SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES EAST NORTHEAST OF MC COMB MISSISSIPPI TO 40 MILES SOUTH OF HOUMA LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8). 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...WW 536...WW 537... DISCUSSION...SRN END OF EXTENSIVE SSW-NNE LWR MS VLY SQLN SHOULD CONTINUE ESE AT 15-20 KTS ACROSS WW AREA THROUGH THIS EVE. WHILE LOW TO MID-LVL FLOW WILL BE SOMEWHAT VEERED RELATIVE TO POINTS FARTHER N...COMBINATION OF RICH...LOW-LVL MOISTURE...STRENGTHENING DEEP SHEAR/ASCENT ON SRN END OF SRN PLNS UPR TROUGH...AND WEAKLY-CAPPED ENVIRONMENT PER 18Z RAOB DATA SUGGEST POTENTIAL FOR SEMI-DISCRETE STORMS CAPABLE OF DMGG WIND BOTH WITHIN AND POSSIBLY AHEAD OF SQLN...AND A CONDITIONAL RISK FOR TORNADOES. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 24030. ...CORFIDI
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 13, 12:13 PM CDT | Mesoscale Discussion | SPC | Barbour, Bullock, Butler, Coffee, Conecuh, Covington and 10 more | 2 hr |
| Oct 13, 2:22 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Chilton, Colbert, Cullman, Fayette and 18 more | 113 min |
| Oct 13, 3:37 PM CDT | Tornado Watch | SPC | Autauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 33 more | 8 hr |
| Oct 13, 4:46 PM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Clarke, Coffee, Conecuh, Covington and 10 more | 89 min |
| Oct 13, 5:27 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Lamar, Lauderdale, Marion | 63 min |
| Oct 12, 8:04 PM CDT | Mesoscale Discussion | SPC | East Carroll, Morehouse, West Carroll | 86 min |
| Oct 13, 2:43 AM CDT | Mesoscale Discussion | SPC | Bossier, Caddo, De Soto, Webster | 92 min |
| Oct 13, 3:22 AM CDT | Tornado Watch | SPC | Bossier, Caddo, De Soto, Webster | 8 hr |
| Oct 13, 6:34 AM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Caldwell, Catahoula, Claiborne and 21 more | 86 min |
| Oct 13, 7:08 AM CDT | Tornado Watch | SPC | Bienville, Caldwell, Catahoula, Claiborne, Concordia, East Carroll and 16 more | 7 hr |
| Oct 13, 10:20 AM CDT | Mesoscale Discussion | SPC | Bienville, Caldwell, Catahoula, Concordia, East Carroll, Franklin and 14 more | 115 min |
| Oct 13, 11:10 AM CDT | Tornado Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 10 more | 8 hr |
| Oct 13, 11:52 AM CDT | Mesoscale Discussion | SPC | East Carroll, Franklin, Madison, Richland, Tensas, West Carroll | 113 min |
| Oct 13, 12:57 PM CDT | Tornado Watch | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Tensas | 7 hr |
| Oct 13, 5:45 PM CDT | Mesoscale Discussion | SPC | Jefferson, Lafourche, Orleans, Saint Charles, Saint James, Saint John the Baptist and 4 more | 90 min |
| Oct 12, 11:46 PM CDT | Mesoscale Discussion | SPC | Calhoun, Carroll, Chickasaw, Clay, Grenada, Itawamba and 10 more | 89 min |
Nearby
Tornado Watches in Louisiana, 2014Tornado Watches in Mississippi, 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.