Alert archive / Louisiana / Tornado Watches in 2005
Tornado Watch 810
The Storm Prediction Center issued this tornado watch at Sep 23, 2005, 5:10 PM CDT for 4 counties in Alabama; 36 parishes in Louisiana; 15 counties in Mississippi. It was in force for 13 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 23, 2005, 5:10 PM CDT (22:10 UTC)
- Expired
- Sep 24, 2005, 5:43 AM CDT
- In force
- 13 hr
- Issued by
- the Storm Prediction Center
All 55 counties
Baldwin County, AL, Clarke County, AL, Mobile County, AL, Washington County, AL, Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Jefferson Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Pointe Coupee Parish, LA, Rapides 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 Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Lamar County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Stone County, MS, Walthall County, MS, Wilkinson County, MS
Warnings issued inside it
22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 23, 5:14 PM CDT | Tornado Warning | LIX | Livingston, Tangipahoa | 31 min |
| Sep 23, 5:20 PM CDT | Tornado Warning | JAN | Marion | 14 min |
| Sep 23, 7:02 PM CDT | Tornado Warning | LIX | East Baton Rouge, Livingston | 28 min |
| Sep 23, 8:06 PM CDT | Tornado Warning | LIX | Livingston | 24 min |
| Sep 23, 9:59 PM CDT | Tornado Warning | LCH | Lafayette | 31 min |
| Sep 23, 9:59 PM CDT | Tornado Warning | LCH | Lafayette | 31 min |
| Sep 23, 9:59 PM CDT | Tornado Warning | LCH | Cameron | 2 hr |
| Sep 23, 10:18 PM CDT | Tornado Warning | LCH | Allen | 27 min |
| Sep 23, 10:28 PM CDT | Tornado Warning | LCH | Acadia, Vermilion | 32 min |
| Sep 23, 10:37 PM CDT | Tornado Warning | LCH | Jefferson Davis | 23 min |
| Sep 23, 11:53 PM CDT | Tornado Warning | LCH | Calcasieu, Cameron | 2 hr |
| Sep 23, 11:55 PM CDT | Flash Flood Warning | LIX | Ascension, Assumption, Iberville, Lafourche, Pointe Coupee, Saint James and 2 more | 4 hr |
| Sep 24, 12:53 AM CDT | Tornado Warning | LCH | Avoyelles, Rapides | 37 min |
| Sep 24, 12:55 AM CDT | Tornado Warning | LIX | East Baton Rouge, West Baton Rouge | 20 min |
| Sep 24, 1:34 AM CDT | Flash Flood Warning | LIX | East Baton Rouge | 3 hr |
| Sep 24, 1:52 AM CDT | Tornado Warning | LCH | Calcasieu, Cameron, Jefferson Davis | 2 hr |
| Sep 24, 1:52 AM CDT | Tornado Warning | LCH | Calcasieu, Cameron, Jefferson Davis | 2 hr |
| Sep 24, 2:29 AM CDT | Flash Flood Warning | LIX | Livingston, Saint Charles, Saint John the Baptist | 3 hr |
| Sep 24, 3:32 AM CDT | Tornado Warning | LIX | Livingston, Saint Helena | 13 min |
| Sep 24, 4:13 AM CDT | Tornado Warning | LCH | Beauregard, Calcasieu, Cameron, Vernon | 62 min |
| Sep 24, 4:43 AM CDT | Tornado Warning | LIX | Saint Helena, Tangipahoa | 17 min |
| Sep 24, 5:10 AM CDT | Tornado Warning | LCH | Allen, Beauregard, Vernon | 65 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, 10.2 hours before the alert went out and 155 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
- 377 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 686 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 268 m²/s²
- 0-3 km storm-relative helicity
- 298 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 232209
SEL0
SPC WW 232209
ALZ000-LAZ000-MSZ000-CWZ000-241100-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 810
NWS STORM PREDICTION CENTER NORMAN OK
510 PM CDT FRI SEP 23 2005
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
EXTREME SOUTHWESTERN ALABAMA
SOUTHERN AND PARTS OF CENTRAL LOUISIANA
SOUTHERN MISSISSIPPI
COASTAL WATERS
EFFECTIVE THIS FRIDAY AFTERNOON AND SATURDAY MORNING FROM 510 PM
UNTIL 600 AM CDT.
TORNADOES...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS
LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF LAKE CHARLES
LOUISIANA TO 30 MILES EAST OF MOBILE ALABAMA. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU0).
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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 809. WATCH NUMBER 809 WILL NOT BE IN EFFECT AFTER 510
PM CDT.
DISCUSSION...HRCN RITA CONTINUES TO MOVE WNWWD TOWARD THE LA/TX
COAST AND WILL BE LOCATED VERY NEAR SHORE LATE TONIGHT. LOW-LEVEL
SHEAR PROFILES CONTINUE TO STRENGTHEN ACROSS SRN LA EWD TO SWRN AL.
SPIRAL RAINBANDS WILL CONTINUE TO ROTATE ONSHORE THROUGH THE
NIGHT...PARTICULARLY ACROSS SRN AND PARTS OF CNTRL LA WITH EMBEDDED
SUPERCELLS AND POSSIBLE TORNADOES.
THE FORECAST MAXIMUM WIND GUSTS AND MEAN CELL MOTION APPLY TO SEVERE
THUNDERSTORMS OUTSIDE THE HURRICANE EYEWALL.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH EXTREME
TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI
WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 13035.
...RACY/EVANS
310,0933 314,0874 293,0874 290,0933SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 23, 9:55 AM CDT | Tornado Watch | SPC | Baldwin, Mobile | 7 hr |
| Sep 23, 2:12 PM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 93 min |
| Sep 23, 4:33 PM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 87 min |
| Sep 23, 7:44 AM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, Cameron, Iberville, Lafayette, Orleans and 5 more | 91 min |
Nearby
Tornado Watches in Louisiana, 2005Tornado Watches in Mississippi, 2005Tornado Watches in Alabama, 2005Every tornado watch in 2005
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.