Alert archive / Mississippi / Tornado Watches in 2011
Tornado Watch 232
The Storm Prediction Center issued this tornado watch at Apr 27, 2011, 11:02 AM CDT for 9 parishes in Louisiana; 69 counties in Mississippi. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2011, 11:02 AM CDT (16:02 UTC)
- Expired
- Apr 27, 2011, 7:00 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Particularly dangerous situation
- Yes
- Largest hail expected
- 4 in
- Strongest gust expected
- 70 kt
All 78 counties
Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Alcorn County, MS, Attala County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Coahoma County, MS, Copiah County, MS, Covington County, MS, DeSoto County, MS, Forrest County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Itawamba County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lafayette County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Marion County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 61 km from the middle of the area, began a volume at 16:02 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
- 95%
- One or more EF2 to EF5 tornadoes
- 90%
- Ten or more severe wind reports
- 95%
- One or more gusts of 65 knots or more
- 90%
- Ten or more severe hail reports
- 95%
- One or more hailstones of 2 inches or more
- 90%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
80 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 11:10 AM CDT | Tornado Warning | MEG | DeSoto, Marshall, Tate | 50 min |
| Apr 27, 11:18 AM CDT | Flash Flood Warning | MEG | Alcorn, Benton, Calhoun, Chickasaw, Itawamba, Lafayette and 10 more | 6 hr |
| Apr 27, 11:22 AM CDT | Severe Thunderstorm Warning | JAN | Bolivar | 53 min |
| Apr 27, 11:54 AM CDT | Severe Thunderstorm Warning | JAN | Bolivar | 36 min |
| Apr 27, 11:54 AM CDT | Severe Thunderstorm Warning | MEG | Coahoma, DeSoto, Panola, Quitman, Tate, Tunica | 51 min |
| Apr 27, 11:56 AM CDT | Severe Thunderstorm Warning | MEG | Coahoma, Panola, Quitman | 49 min |
| Apr 27, 12:03 PM CDT | Tornado Warning | JAN | Bolivar, Sunflower | 40 min |
| Apr 27, 12:13 PM CDT | Tornado Warning | MEG | Coahoma, Lafayette, Panola, Quitman, Tallahatchie, Yalobusha | 62 min |
| Apr 27, 12:33 PM CDT | Severe Thunderstorm Warning | MEG | Benton, DeSoto, Marshall, Tate, Tunica | 42 min |
| Apr 27, 12:51 PM CDT | Severe Thunderstorm Warning | JAN | Issaquena, Sharkey, Washington | 39 min |
| Apr 27, 1:00 PM CDT | Tornado Warning | MEG | Calhoun, Lafayette, Marshall, Panola, Pontotoc, Quitman and 3 more | 60 min |
| Apr 27, 1:03 PM CDT | Tornado Warning | MEG | Calhoun, Lafayette, Panola, Tallahatchie, Yalobusha | 42 min |
| Apr 27, 1:06 PM CDT | Severe Thunderstorm Warning | JAN | Humphreys, Leflore, Sunflower | 54 min |
| Apr 27, 1:19 PM CDT | Tornado Warning | MEG | Calhoun, Lafayette, Panola, Pontotoc, Quitman, Tallahatchie and 1 more | 41 min |
| Apr 27, 1:25 PM CDT | Severe Thunderstorm Warning | JAN | Leake, Rankin, Scott | 50 min |
| Apr 27, 1:32 PM CDT | Severe Thunderstorm Warning | MEG | Benton, Marshall, Tippah | 28 min |
| Apr 27, 1:34 PM CDT | Severe Thunderstorm Warning | JAN | Catahoula, Concordia, Tensas | 56 min |
| Apr 27, 1:36 PM CDT | Tornado Warning | JAN | Leake, Scott | 41 min |
| Apr 27, 1:37 PM CDT | Severe Thunderstorm Warning | JAN | Carroll, Grenada | 53 min |
| Apr 27, 1:37 PM CDT | Tornado Warning | MEG | Calhoun, Itawamba, Lafayette, Lee, Pontotoc, Prentiss and 3 more | 53 min |
| Apr 27, 1:45 PM CDT | Severe Thunderstorm Warning | MEG | Calhoun, Chickasaw, Lafayette, Lee, Pontotoc, Union and 1 more | 45 min |
| Apr 27, 1:50 PM CDT | Severe Thunderstorm Warning | MEG | Alcorn, Benton, Lafayette, Marshall, Panola, Prentiss and 2 more | 40 min |
| Apr 27, 1:55 PM CDT | Severe Thunderstorm Warning | MEG | Benton, Marshall, Tippah | 12 min |
| Apr 27, 1:56 PM CDT | Flash Flood Warning | MEG | Tishomingo | 3 hr |
| Apr 27, 1:57 PM CDT | Severe Thunderstorm Warning | JAN | Carroll, Grenada, Leflore, Montgomery, Webster | 63 min |
| Apr 27, 1:58 PM CDT | Severe Thunderstorm Warning | JAN | Covington, Jefferson Davis | 47 min |
| Apr 27, 2:01 PM CDT | Tornado Warning | MEG | Calhoun, Chickasaw, Lafayette, Pontotoc, Yalobusha | 44 min |
| Apr 27, 2:03 PM CDT | Tornado Warning | JAN | Neshoba | 47 min |
| Apr 27, 2:03 PM CDT | Tornado Warning | JAN | Claiborne, Jefferson | 42 min |
| Apr 27, 2:04 PM CDT | Tornado Warning | JAN | Carroll, Grenada, Montgomery, Webster | 56 min |
| Apr 27, 2:09 PM CDT | Severe Thunderstorm Warning | JAN | Holmes, Humphreys, Yazoo | 51 min |
| Apr 27, 2:21 PM CDT | Tornado Warning | JAN | Covington, Jasper, Jones, Smith | 54 min |
| Apr 27, 2:23 PM CDT | Tornado Warning | MEG | Alcorn, Prentiss, Tippah, Tishomingo, Union | 37 min |
| Apr 27, 2:25 PM CDT | Severe Thunderstorm Warning | MEG | Alcorn, Benton, Lafayette, Marshall, Prentiss, Tippah and 1 more | 50 min |
| Apr 27, 2:29 PM CDT | Tornado Warning | MEG | Calhoun, Chickasaw, Lee, Pontotoc, Yalobusha | 46 min |
| Apr 27, 2:31 PM CDT | Tornado Warning | MEG | Calhoun, Chickasaw, Lafayette, Lee, Pontotoc, Union | 44 min |
| Apr 27, 2:32 PM CDT | Tornado Warning | JAN | Kemper, Noxubee, Winston | 58 min |
| Apr 27, 2:35 PM CDT | Tornado Warning | MEG | Calhoun, Chickasaw, Lee, Monroe | 40 min |
| Apr 27, 2:42 PM CDT | Tornado Warning | JAN | Claiborne, Copiah, Hinds | 48 min |
| Apr 27, 2:50 PM CDT | Tornado Warning | MEG | Alcorn, Prentiss, Tishomingo | 40 min |
| Apr 27, 2:51 PM CDT | Severe Thunderstorm Warning | JAN | Attala, Carroll, Montgomery | 39 min |
| Apr 27, 2:54 PM CDT | Tornado Warning | MEG | Itawamba, Lee, Pontotoc, Prentiss, Tishomingo, Union | 66 min |
| Apr 27, 2:55 PM CDT | Severe Thunderstorm Warning | JAN | Kemper, Lauderdale, Neshoba, Newton | 50 min |
| Apr 27, 3:01 PM CDT | Tornado Warning | MEG | Calhoun, Chickasaw, Itawamba, Monroe | 59 min |
| Apr 27, 3:06 PM CDT | Tornado Warning | JAN | Carroll, Choctaw, Montgomery, Webster | 54 min |
| Apr 27, 3:07 PM CDT | Severe Thunderstorm Warning | MEG | Alcorn, Tippah | 38 min |
| Apr 27, 3:09 PM CDT | Tornado Warning | JAN | Kemper, Neshoba | 66 min |
| Apr 27, 3:11 PM CDT | Severe Thunderstorm Warning | MEG | Monroe | 49 min |
| Apr 27, 3:21 PM CDT | Tornado Warning | MEG | Chickasaw, Itawamba, Lee, Monroe | 54 min |
| Apr 27, 3:23 PM CDT | Tornado Warning | JAN | Hinds, Rankin | 52 min |
| Apr 27, 3:26 PM CDT | Severe Thunderstorm Warning | JAN | Attala, Holmes, Leake, Madison | 52 min |
| Apr 27, 3:41 PM CDT | Tornado Warning | JAN | Attala, Choctaw, Oktibbeha, Winston | 64 min |
| Apr 27, 3:41 PM CDT | Tornado Warning | MEG | Prentiss, Tishomingo | 34 min |
| Apr 27, 3:44 PM CDT | Tornado Warning | JAN | Clay, Oktibbeha, Webster | 44 min |
| Apr 27, 3:45 PM CDT | Tornado Warning | JAN | Noxubee | 30 min |
| Apr 27, 3:53 PM CDT | Tornado Warning | JAN | Rankin, Scott, Simpson, Smith | 52 min |
| Apr 27, 3:53 PM CDT | Tornado Warning | MEG | Monroe | 67 min |
| Apr 27, 4:14 PM CDT | Severe Thunderstorm Warning | JAN | Webster | 26 min |
| Apr 27, 4:22 PM CDT | Severe Thunderstorm Warning | JAN | Lauderdale | 38 min |
| Apr 27, 4:31 PM CDT | Severe Thunderstorm Warning | JAN | Copiah, Simpson | 44 min |
| Apr 27, 4:34 PM CDT | Severe Thunderstorm Warning | MEG | Chickasaw, Itawamba, Lee, Monroe | 41 min |
| Apr 27, 4:36 PM CDT | Tornado Warning | JAN | Oktibbeha | 39 min |
| Apr 27, 4:38 PM CDT | Tornado Warning | JAN | Jasper, Newton, Scott, Smith | 67 min |
| Apr 27, 4:38 PM CDT | Severe Thunderstorm Warning | MEG | Monroe | 37 min |
| Apr 27, 4:39 PM CDT | Severe Thunderstorm Warning | JAN | Clay | 23 min |
| Apr 27, 4:41 PM CDT | Severe Thunderstorm Warning | MEG | Chickasaw, Itawamba, Monroe | 37 min |
| Apr 27, 4:46 PM CDT | Tornado Warning | JAN | Lauderdale | 29 min |
| Apr 27, 4:47 PM CDT | Tornado Warning | MEG | Monroe | 28 min |
| Apr 27, 4:55 PM CDT | Tornado Warning | JAN | Clay, Lowndes | 45 min |
| Apr 27, 5:02 PM CDT | Tornado Warning | JAN | Rankin, Simpson, Smith | 58 min |
| Apr 27, 5:05 PM CDT | Flash Flood Warning | MEG | Alcorn, Calhoun, Chickasaw, Itawamba, Lee, Monroe and 5 more | 85 min |
| Apr 27, 5:23 PM CDT | Tornado Warning | JAN | Lauderdale | 52 min |
| Apr 27, 5:43 PM CDT | Tornado Warning | JAN | Jasper, Newton | 50 min |
| Apr 27, 5:44 PM CDT | Severe Thunderstorm Warning | JAN | Choctaw, Clay, Oktibbeha, Webster | 41 min |
| Apr 27, 5:47 PM CDT | Severe Thunderstorm Warning | MEG | Chickasaw, Itawamba, Lee, Monroe | 21 min |
| Apr 27, 6:12 PM CDT | Tornado Warning | JAN | Kemper, Lauderdale | 33 min |
| Apr 27, 6:17 PM CDT | Severe Thunderstorm Warning | JAN | Lawrence, Lincoln, Marion | 39 min |
| Apr 27, 6:22 PM CDT | Tornado Warning | JAN | Clarke, Lauderdale | 53 min |
| Apr 27, 6:31 PM CDT | Severe Thunderstorm Warning | MEG | Monroe | 14 min |
| Apr 27, 6:37 PM CDT | Severe Thunderstorm Warning | JAN | Covington, Jefferson Davis, Lamar, Marion | 53 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
Jackson, MS (KJAN), launched 12:00Z, 4.0 hours before the alert went out and 55 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
- 890 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 609 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 449 m²/s²
- 0-3 km storm-relative helicity
- 786 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 21.2
The text
As transmitted, in the capitals the NWS used until 2016.
221
WWUS20 KWNS 271605
SEL2
SPC WW 271605
ARZ000-LAZ000-MSZ000-280000-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 232
NWS STORM PREDICTION CENTER NORMAN OK
1105 AM CDT WED APR 27 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
EXTREME SOUTHEAST ARKANSAS
NORTHEAST LOUISIANA
MUCH OF MISSISSIPPI
EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1105 AM UNTIL
700 PM CDT.
...THIS IS A PARTICULARLY DANGEROUS SITUATION...
DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 INCHES IN DIAMETER...
THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE
POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 45 MILES EAST SOUTHEAST OF
NATCHEZ MISSISSIPPI TO 50 MILES NORTH OF TUPELO MISSISSIPPI. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU2).
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 229...WW 230...WW 231...
DISCUSSION...A VERY VOLATILE SETUP IS DEVELOPING FOR PORTIONS OF MS
LATER TODAY AS A MOIST AND VERY UNSTABLE AIR MASS RETURNS INTO AN
AREA WITH IMPRESSIVE LOW LEVEL AND DEEP LAYER VERTICAL SHEAR
PROFILES. ACTIVITY IS CURRENTLY DEVELOPING OVER SOUTHEAST
AR/NORTHEAST LA. HOWEVER...IT APPEARS THE PRIMARY CONCERN WILL
START BY EARLY AFTERNOON OVER CENTRAL/NORTHERN MS WHERE DISCRETE
TORNADIC SUPERCELLS ARE LIKELY. ALL PARAMETERS SUGGEST THAT
STRONG/VIOLENT AND LONG-TRACK TORNADOES ARE POSSIBLE. VERY LARGE
HAIL AND WIDESPREAD DAMAGING WINDS ARE ALSO A CONCERN.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 25040.
...HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 7:59 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Lamar, Lauderdale, Lawrence, Limestone and 1 more | 2 hr |
| Apr 26, 9:33 PM CDT | Tornado Watch | SPC | Colbert, Franklin, Lauderdale | 7 hr |
| Apr 26, 11:33 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Lamar, Lauderdale, Marion | 117 min |
| Apr 27, 1:56 AM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Cullman, Fayette, Greene, Hale and 12 more | 64 min |
| Apr 27, 2:26 AM CDT | Tornado Watch | SPC | Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 29 more | 6 hr |
| Apr 27, 8:08 AM CDT | Tornado Watch | SPC | Colbert, Cullman, DeKalb, Fayette, Franklin, Jackson and 10 more | 6 hr |
| Apr 27, 10:45 AM CDT | Mesoscale Discussion | SPC | Greene, Lamar, Marion, Pickens, Sumter | 90 min |
| Apr 27, 11:39 AM CDT | Mesoscale Discussion | SPC | Cullman, DeKalb, Jackson, Madison, Marshall, Morgan | 66 min |
| Apr 27, 1:05 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Chilton, Choctaw and 27 more | 85 min |
| Apr 27, 1:42 PM CDT | Tornado Watch | SPC | Autauga, Bibb, Blount, Butler, Calhoun, Cherokee and 41 more | 8 hr |
| Apr 27, 2:56 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Chilton, Choctaw and 33 more | 2 hr |
| Apr 27, 5:01 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Butler, Calhoun, Cherokee and 38 more | 89 min |
| Apr 27, 5:41 PM CDT | Mesoscale Discussion | SPC | Barbour, Bullock, Chambers, Crenshaw, Elmore, Lee and 6 more | 34 min |
| Apr 27, 5:52 PM CDT | Tornado Watch | SPC | Barbour, Bullock, Chambers, Elmore, Lee, Macon and 5 more | 9 hr |
| Apr 27, 6:39 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 26 more | 66 min |
| Apr 26, 8:53 PM CDT | Mesoscale Discussion | SPC | Beauregard, Bienville, Bossier, Caddo, Claiborne, De Soto and 12 more | 97 min |
| Apr 26, 9:42 PM CDT | Tornado Watch | SPC | Avoyelles, Beauregard, Rapides, Vernon | 7 hr |
| Apr 27, 3:29 AM CDT | Mesoscale Discussion | SPC | Bossier, Caddo | 2 hr |
| Apr 27, 4:53 AM CDT | Severe Thunderstorm Watch | SPC | Bienville, Bossier, Caddo, Caldwell, Catahoula, Claiborne and 16 more | 5 hr |
| Apr 27, 9:48 AM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 14 more | 27 min |
| Apr 26, 9:13 PM CDT | Mesoscale Discussion | SPC | Benton, Bolivar, Coahoma, DeSoto, Marshall, Panola and 3 more | 62 min |
| Apr 26, 9:58 PM CDT | Tornado Watch | SPC | DeSoto, Tunica | 7 hr |
| Apr 27, 6:25 AM CDT | Mesoscale Discussion | SPC | Alcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 33 more | 65 min |
| Apr 27, 6:27 PM CDT | Mesoscale Discussion | SPC | Clarke, Clay, Copiah, Covington, Forrest, Jasper and 22 more | 33 min |
| Apr 27, 6:42 PM CDT | Tornado Watch | SPC | Clarke, Covington, Forrest, Jasper, Jefferson Davis, Jones and 13 more | 3 hr |
Nearby
Tornado Watches in Mississippi, 2011Tornado Watches in Louisiana, 2011Every tornado watch in 2011
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.