Alert archive / Mississippi / Tornado Watches in 2005
Tornado Watch 153
The Storm Prediction Center issued this tornado watch at Apr 11, 2005, 2:05 PM CDT for 20 parishes in Louisiana; 34 counties in Mississippi. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 11, 2005, 2:05 PM CDT (19:05 UTC)
- Expired
- Apr 11, 2005, 9:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 54 counties
Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Lafayette Parish, LA, Livingston Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Vermilion Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Attala County, MS, Choctaw County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Hinds County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Monroe County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Wilkinson County, MS, Winston County, MS
Warnings issued inside it
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 2:30 PM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, Iberville, Pointe Coupee, West Baton Rouge | 30 min |
| Apr 11, 3:00 PM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, Livingston | 30 min |
| Apr 11, 3:11 PM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 34 min |
| Apr 11, 4:23 PM CDT | Severe Thunderstorm Warning | JAN | Hinds | 52 min |
| Apr 11, 4:41 PM CDT | Severe Thunderstorm Warning | JAN | Clay, Webster | 64 min |
| Apr 11, 4:57 PM CDT | Severe Thunderstorm Warning | MEG | Monroe | 48 min |
| Apr 11, 5:19 PM CDT | Severe Thunderstorm Warning | JAN | Hinds, Rankin | 56 min |
| Apr 11, 5:19 PM CDT | Tornado Warning | LIX | Amite, Pike | 41 min |
| Apr 11, 5:27 PM CDT | Severe Thunderstorm Warning | JAN | Lincoln | 48 min |
| Apr 11, 6:00 PM CDT | Severe Thunderstorm Warning | LIX | Saint Helena, Tangipahoa | 45 min |
| Apr 11, 6:10 PM CDT | Tornado Warning | LIX | Pike, Walthall | 35 min |
| Apr 11, 6:19 PM CDT | Tornado Warning | LIX | Tangipahoa, Washington | 41 min |
| Apr 11, 6:36 PM CDT | Severe Thunderstorm Warning | JAN | Hinds, Madison | 40 min |
| Apr 11, 6:41 PM CDT | Tornado Warning | JAN | Marion | 64 min |
| Apr 11, 6:54 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa, Washington | 36 min |
| Apr 11, 6:59 PM CDT | Tornado Warning | LIX | Walthall | 16 min |
| Apr 11, 7:13 PM CDT | Severe Thunderstorm Warning | LIX | Walthall | 32 min |
| Apr 11, 7:44 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa, Washington | 46 min |
| Apr 11, 7:51 PM CDT | Tornado Warning | LIX | Saint Tammany, Washington | 24 min |
| Apr 11, 8:17 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 43 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, 7.1 hours before the alert went out and 142 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
- 46 J/kg
- Mixed-layer CIN
- -604 J/kg
- Mixed-layer LCL
- 650 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 185 m²/s²
- 0-3 km storm-relative helicity
- 273 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 111908
SEL3
SPC WW 111908
LAZ000-MSZ000-CWZ000-120200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 153
NWS STORM PREDICTION CENTER NORMAN OK
205 PM CDT MON APR 11 2005
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHERN AND EASTERN LOUISIANA
SOUTHERN AND EASTERN MISSISSIPPI
COASTAL WATERS
EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 205 PM UNTIL 900
PM CDT.
...THIS IS A PARTICULARLY DANGEROUS SITUATION...
DESTRUCTIVE TORNADOES...LARGE HAIL TO 2.5 INCHES IN DIAMETER...
THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE
POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTH OF COLUMBUS
MISSISSIPPI TO 40 MILES SOUTH SOUTHWEST OF INTRACOASTAL CITY
LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
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 150...WW 151...WW 152...
DISCUSSION...CNTRL LA SQUALL LINE WITH EMBEDDED SUPERCELLS EXPECTED
TO CONTINUE EWD INTO AREA NEAR MS RVR THAT HAS EXPERIENCED GREATER
SURFACE HEATING THAN POINTS FARTHER W. IN ADDITION...OTHER STORMS
ARE FORMING IN LOW LEVEL CONVERGENCE ZONE AHEAD OF SQUALL LINE OVER
S CNTRL LA. PERSISTENT LARGE SCALE ASCENT IN DIFFLUENCE ZONE OF
APPROACHING UPPER TROUGH AND CONTINUED HEATING SUGGEST THAT RISK FOR
POSSIBLE STRONG TORNADOES...IN ADDITION TO DAMAGING WIND/HAIL...WILL
SPREAD E/NE THROUGH EARLY TONIGHT.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 23035.
...CORFIDI
320,0882 280,0922 302,0922 342,0882SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 3:12 AM CDT | Mesoscale Discussion | SPC | Beauregard, Bienville, Bossier, Caddo, Calcasieu, Claiborne and 6 more | 63 min |
| Apr 11, 3:45 AM CDT | Severe Thunderstorm Watch | SPC | Beauregard, Bienville, Bossier, Caddo, Calcasieu, Claiborne and 12 more | 7 hr |
| Apr 11, 3:56 AM CDT | Mesoscale Discussion | SPC | Franklin, Madison, Tensas | 64 min |
| Apr 11, 6:53 AM CDT | Mesoscale Discussion | SPC | Beauregard, Bienville, Bossier, Caddo, Calcasieu, Claiborne and 12 more | 67 min |
| Apr 11, 9:41 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 47 more | 2 hr |
| Apr 11, 10:15 AM CDT | Tornado Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Calcasieu and 25 more | 9 hr |
| Apr 11, 12:12 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 47 more | 2 hr |
| Apr 11, 1:41 PM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Lafourche and 14 more | 2 hr |
| Apr 11, 6:35 PM CDT | Tornado Watch | SPC | Jefferson, Lafourche, Orleans, Saint Bernard, Saint Charles, Saint Tammany and 1 more | 4 hr |
| Apr 11, 6:52 PM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 9 more | 83 min |
| Apr 11, 6:17 AM CDT | Mesoscale Discussion | SPC | DeSoto, Tunica | 118 min |
| Apr 11, 1:17 PM CDT | Mesoscale Discussion | SPC | Alcorn, Benton, Coahoma, Itawamba, Lafayette, Lee and 10 more | 58 min |
| Apr 11, 1:35 PM CDT | Tornado Watch | SPC | Alcorn, Benton, Calhoun, Chickasaw, Itawamba, Lafayette and 10 more | 5 hr |
Nearby
Tornado Watches in Mississippi, 2005Tornado Watches in Louisiana, 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.