Alert archive / Louisiana / Tornado Watches in 2010
Tornado Watch 92
The Storm Prediction Center issued this tornado watch at Apr 24, 2010, 6:15 AM CDT for 9 counties in Alabama; 38 parishes in Louisiana; 13 counties in Mississippi. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2010, 6:15 AM CDT (11:15 UTC)
- Expired
- Apr 24, 2010, 1:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 60 counties
Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox 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, Plaquemines 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, Terrebonne Parish, LA, Vermilion Parish, LA, Vernon 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
- 50%
- One or more EF2 to EF5 tornadoes
- 30%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
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 24, 6:21 AM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa, Washington | 54 min |
| Apr 24, 7:49 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Pointe Coupee, Saint Helena, West Baton Rouge, West Feliciana | 26 min |
| Apr 24, 7:58 AM CDT | Severe Thunderstorm Warning | MOB | Choctaw | 32 min |
| Apr 24, 8:02 AM CDT | Severe Thunderstorm Warning | MOB | Choctaw, Washington | 43 min |
| Apr 24, 8:03 AM CDT | Severe Thunderstorm Warning | LCH | Vernon | 42 min |
| Apr 24, 8:08 AM CDT | Tornado Warning | LIX | East Feliciana, Saint Helena | 37 min |
| Apr 24, 8:30 AM CDT | Tornado Warning | MOB | Choctaw | 36 min |
| Apr 24, 8:30 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, Livingston, Saint Helena, Tangipahoa | 42 min |
| Apr 24, 8:45 AM CDT | Severe Thunderstorm Warning | MOB | Choctaw, Clarke, Washington | 60 min |
| Apr 24, 9:10 AM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa, Washington | 41 min |
| Apr 24, 9:26 AM CDT | Severe Thunderstorm Warning | LIX | Washington | 64 min |
| Apr 24, 9:50 AM CDT | Severe Thunderstorm Warning | MOB | Choctaw | 55 min |
| Apr 24, 10:03 AM CDT | Tornado Warning | LIX | Pearl River | 27 min |
| Apr 24, 10:10 AM CDT | Tornado Warning | MOB | Perry, Stone | 50 min |
| Apr 24, 10:33 AM CDT | Severe Thunderstorm Warning | MOB | Wayne | 31 min |
| Apr 24, 10:47 AM CDT | Tornado Warning | MOB | Choctaw, Clarke, Washington | 58 min |
| Apr 24, 11:23 AM CDT | Tornado Warning | MOB | Choctaw | 37 min |
| Apr 24, 11:42 AM CDT | Tornado Warning | MOB | Choctaw, Clarke, Washington | 47 min |
| Apr 24, 11:58 AM CDT | Tornado Warning | MOB | Choctaw | 32 min |
| Apr 24, 12:20 PM CDT | Tornado Warning | MOB | Clarke, Wilcox | 37 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 00:00Z, 11.3 hours before the alert went out and 91 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
- 1334 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 454 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 477 m²/s²
- 0-3 km storm-relative helicity
- 593 m²/s²
- Significant tornado parameter
- 4.9
- Supercell composite
- 19.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 7:39 PM CDT | Mesoscale Discussion | SPC | Baldwin, Bibb, Choctaw, Clarke, Conecuh, Dallas and 12 more | 36 min |
| Apr 23, 10:32 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Chilton, Choctaw, Clarke, Dallas and 11 more | 58 min |
| Apr 24, 2:07 AM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Clarke, Conecuh, Covington, Escambia and 3 more | 53 min |
| Apr 24, 7:43 AM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Chilton, Coosa, Cullman, Dallas and 18 more | 2 hr |
| Apr 24, 8:01 AM CDT | Tornado Watch | SPC | Autauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 34 more | 5 hr |
| Apr 24, 9:31 AM CDT | Mesoscale Discussion | SPC | Colbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 5 more | 59 min |
| Apr 24, 10:28 AM CDT | Mesoscale Discussion | SPC | Autauga, Baldwin, Bibb, Blount, Butler, Calhoun and 32 more | 92 min |
| Apr 24, 11:40 AM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Bullock, Butler, Calhoun and 39 more | 95 min |
| Apr 24, 12:47 PM CDT | Tornado Watch | SPC | Baldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 11 more | 7 hr |
| Apr 24, 1:17 PM CDT | Tornado Watch | SPC | Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 44 more | 8 hr |
| Apr 24, 2:01 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Chilton, Colbert, Cullman and 24 more | 89 min |
| Apr 24, 5:48 PM CDT | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bibb, Blount, Bullock and 61 more | 57 min |
| Apr 24, 1:20 AM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 13 more | 25 min |
| Apr 24, 1:50 AM CDT | Tornado Watch | SPC | Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more | 8 hr |
| Apr 24, 5:01 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Bossier and 38 more | 89 min |
| Apr 24, 6:00 AM CDT | Tornado Watch | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Morehouse and 3 more | 6 hr |
| Apr 24, 7:25 AM CDT | Mesoscale Discussion | SPC | Bienville, Caldwell, Grant, Jackson, Lincoln, Morehouse and 4 more | 95 min |
| Apr 23, 11:40 PM CDT | Mesoscale Discussion | SPC | Alcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more | 65 min |
| Apr 24, 2:44 AM CDT | Mesoscale Discussion | SPC | Benton, Bolivar, Coahoma, DeSoto, Lafayette, Marshall and 7 more | 91 min |
| Apr 24, 11:31 AM CDT | Tornado Watch | SPC | Alcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 62 more | 8 hr |
Nearby
Tornado Watches in Louisiana, 2010Tornado Watches in Mississippi, 2010Tornado Watches in Alabama, 2010Every tornado watch in 2010
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.