Alert archive / Kentucky / Tornado Watches in 2011

Tornado Watch 224

April 26, 20115 states

The Storm Prediction Center issued this tornado watch at Apr 26, 2011, 9:58 PM CDT for 5 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 26, 2011, 9:58 PM CDT (02:58 UTC)
Expired
Apr 27, 2011, 5:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 119 counties

Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Jackson County, AR, Lee County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Poinsett County, AR, Prairie County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Bourbon County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Calloway County, KY, Casey County, KY, Christian County, KY, Clark County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Fayette County, KY, Franklin County, KY, Fulton County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Harrison County, KY, Hart County, KY, Henry County, KY, Jefferson County, KY, Jessamine County, KY, Larue County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Marion County, KY, Meade County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Nelson County, KY, Nicholas County, KY, Ohio County, KY, Oldham County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Trimble County, KY, Warren County, KY, Washington County, KY, Woodford County, KY, Dunklin County, MO, Pemiscot County, MO, DeSoto County, MS, Tunica County, MS, Bedford County, TN, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN, Wilson County, TN

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
20%
Ten or more severe wind reports
60%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
70%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

60 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 26, 10:00 PM CDTSevere Thunderstorm WarningMEGCraighead, Greene, Mississippi27 min
Apr 26, 10:04 PM CDTSevere Thunderstorm WarningMEGDeSoto56 min
Apr 26, 10:16 PM CDTTornado WarningOHXHickman, Lewis, Perry, Wayne59 min
Apr 26, 10:17 PM CDTTornado WarningMEGDecatur, Hardin28 min
Apr 26, 10:20 PM CDTSevere Thunderstorm WarningLMKShelby, Spencer40 min
Apr 26, 10:23 PM CDTFlash Flood WarningMEGFayette, Hardeman, Haywood, Madison, Tipton4 hr
Apr 26, 10:26 PM CDTSevere Thunderstorm WarningMEGChester, Hardeman, McNairy16 min
Apr 26, 10:27 PM CDTSevere Thunderstorm WarningMEGDeSoto, Marshall, Tate48 min
Apr 26, 10:27 PM CDTSevere Thunderstorm WarningOHXBenton, Dickson, Hickman, Houston, Humphreys, Perry and 1 more33 min
Apr 26, 10:31 PM CDTSevere Thunderstorm WarningLMKOhio29 min
Apr 26, 10:38 PM CDTTornado WarningOHXHickman, Perry37 min
Apr 26, 10:44 PM CDTSevere Thunderstorm WarningMEGCrittenden, Lee, Phillips46 min
Apr 26, 10:48 PM CDTTornado WarningOHXDickson, Hickman, Houston, Humphreys27 min
Apr 26, 10:49 PM CDTSevere Thunderstorm WarningLMKBreckinridge, Edmonson, Grayson26 min
Apr 26, 10:53 PM CDTSevere Thunderstorm WarningMEGDecatur22 min
Apr 26, 11:00 PM CDTFlash Flood WarningLZKArkansas, Bradley, Calhoun, Clark, Cleveland, Dallas and 17 more6 hr
Apr 26, 11:02 PM CDTSevere Thunderstorm WarningLMKBreckinridge, Hancock, Ohio28 min
Apr 26, 11:04 PM CDTSevere Thunderstorm WarningOHXBenton, Hickman, Humphreys, Perry41 min
Apr 26, 11:08 PM CDTSevere Thunderstorm WarningMEGFayette, Hardeman, Haywood52 min
Apr 26, 11:09 PM CDTFlash Flood WarningOHXPerry3 hr
Apr 26, 11:13 PM CDTFlash Flood WarningLMKHancock, Ohio9 hr
Apr 26, 11:13 PM CDTTornado WarningMEGDeSoto, Marshall, Panola, Tate47 min
Apr 26, 11:14 PM CDTSevere Thunderstorm WarningOHXDickson, Hickman, Humphreys, Perry46 min
Apr 26, 11:17 PM CDTSevere Thunderstorm WarningLMKBreckinridge, Grayson28 min
Apr 26, 11:18 PM CDTSevere Thunderstorm WarningLZKArkansas, Desha, Jefferson, Lincoln, Monroe42 min
Apr 26, 11:18 PM CDTSevere Thunderstorm WarningOHXCheatham, Dickson, Houston, Humphreys, Montgomery42 min
Apr 26, 11:22 PM CDTTornado WarningOHXDickson, Houston, Montgomery23 min
Apr 26, 11:23 PM CDTSevere Thunderstorm WarningLMKHenry37 min
Apr 26, 11:29 PM CDTFlash Flood WarningMEGCrittenden, Cross, Lee, Phillips, St. Francis6 hr
Apr 26, 11:31 PM CDTTornado WarningOHXDickson, Montgomery29 min
Apr 26, 11:32 PM CDTFlash Flood WarningLMKBreckinridge, Grayson, Hardin, Meade9 hr
Apr 26, 11:41 PM CDTSevere Thunderstorm WarningLMKButler, Logan34 min
Apr 26, 11:42 PM CDTSevere Thunderstorm WarningOHXBenton, Dickson, Hickman, Humphreys27 min
Apr 26, 11:44 PM CDTTornado WarningPAHTodd27 min
Apr 26, 11:53 PM CDTSevere Thunderstorm WarningOHXCheatham, Dickson, Houston, Humphreys, Montgomery, Robertson55 min
Apr 26, 11:56 PM CDTSevere Thunderstorm WarningMEGFayette, Hardeman49 min
Apr 27, 12:00 AM CDTSevere Thunderstorm WarningLZKArkansas, Desha, Monroe30 min
Apr 27, 12:03 AM CDTSevere Thunderstorm WarningMEGChester, Crockett, Hardeman, Henderson, McNairy, Madison42 min
Apr 27, 12:15 AM CDTSevere Thunderstorm WarningLMKButler, Logan30 min
Apr 27, 12:28 AM CDTTornado WarningMEGHardeman, McNairy32 min
Apr 27, 12:34 AM CDTFlash Flood WarningLMKBullitt, Hardin, Jefferson, Oldham, Trimble3 hr
Apr 27, 12:38 AM CDTFlash Flood WarningLMKButler, Edmonson, Logan, Simpson, Warren3 hr
Apr 27, 12:42 AM CDTSevere Thunderstorm WarningOHXRutherford16 min
Apr 27, 12:45 AM CDTSevere Thunderstorm WarningMEGChester, Hardeman, McNairy24 min
Apr 27, 1:23 AM CDTSevere Thunderstorm WarningLMKEdmonson, Grayson, Hardin22 min
Apr 27, 1:23 AM CDTSevere Thunderstorm WarningPAHChristian, Todd37 min
Apr 27, 1:43 AM CDTSevere Thunderstorm WarningOHXBenton, Hickman, Humphreys, Perry32 min
Apr 27, 1:46 AM CDTTornado WarningOHXHickman, Humphreys, Perry15 min
Apr 27, 1:49 AM CDTSevere Thunderstorm WarningLMKButler, Logan, Ohio41 min
Apr 27, 2:18 AM CDTFlash Flood WarningOHXBenton, Cheatham, Dickson, Hickman, Houston, Humphreys and 4 more4 hr
Apr 27, 2:24 AM CDTTornado WarningMEGMcNairy31 min
Apr 27, 2:26 AM CDTFlash Flood WarningMEGChester, Decatur, Fayette, Hardeman, Hardin, Henderson and 3 more4 hr
Apr 27, 3:13 AM CDTSevere Thunderstorm WarningMEGMcNairy47 min
Apr 27, 3:14 AM CDTTornado WarningMEGHardin, McNairy46 min
Apr 27, 3:24 AM CDTFlash Flood WarningLMKBullitt, Jefferson, Oldham, Trimble5 hr
Apr 27, 3:27 AM CDTFlash Flood WarningLMKButler, Edmonson, Logan, Simpson, Warren5 hr
Apr 27, 3:48 AM CDTTornado WarningMEGHardin18 min
Apr 27, 4:07 AM CDTSevere Thunderstorm WarningOHXWayne23 min
Apr 27, 4:11 AM CDTSevere Thunderstorm WarningOHXWayne34 min
Apr 27, 4:52 AM CDTFlash Flood WarningOHXBenton, Cheatham, Dickson, Hickman, Houston, Humphreys and 6 more3 hr

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 3.0 hours before the alert went out and 124 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.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2011-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1852 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2011-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1852 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1222 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
169 m²/s²
Significant tornado parameter
1.3
Supercell composite
8.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

723 
WWUS20 KWNS 270259
SEL4
SPC WW 270259
ARZ000-KYZ000-MOZ000-MSZ000-TNZ000-271000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 224
NWS STORM PREDICTION CENTER NORMAN OK
1000 PM CDT TUE APR 26 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

       PARTS OF NORTHEAST ARKANSAS
       WESTERN KENTUCKY
       SMALL PART OF SOUTHEAST MISSOURI
       PARTS OF NORTHWEST MISSISSIPPI
       MUCH OF WESTERN AND MIDDLE TENNESSEE

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1000 PM
UNTIL 500 AM CDT.

TORNADOES...HAIL TO 1.5 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 75 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 70 MILES NORTH OF CROSSVILLE
TENNESSEE TO 25 MILES WEST NORTHWEST OF PINE BLUFF ARKANSAS.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).

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 217...TORNADO WATCH NUMBER 221. WATCH NUMBER 217 221
WILL NOT BE IN EFFECT AFTER 1000 PM CDT. CONTINUE...WW 215...WW
218...WW 219...WW 222...WW 223...

DISCUSSION...WITH EXPECTED INTENSIFYING LOW LEVEL JET AND
ACCOMPANYING AVAILABLE UNSTABLE AIR MASS THE POTENTIAL FOR
SUPERCELLS WILL CONTINUE MUCH OF THE NIGHT.  IN ADDITION TO DAMAGING
WINDS AND LARGE HAIL...TORNADOES WILL BE POSSIBLE WITH ANY
SUPERCELL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24035.


...HALES

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 26, 7:59 PM CDTMesoscale DiscussionSPCChicot2 hr
Apr 26, 8:53 PM CDTMesoscale DiscussionSPCCalhoun, Clark, Columbia, Dallas, Grant, Hempstead and 10 more97 min
Apr 26, 9:13 PM CDTMesoscale DiscussionSPCArkansas, Clay, Craighead, Crittenden, Cross, Desha and 21 more62 min
Apr 26, 9:33 PM CDTTornado Watch PDSSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 11 more7 hr
Apr 26, 11:33 PM CDTMesoscale DiscussionSPCChicot, Desha, Phillips117 min
Apr 27, 3:29 AM CDTMesoscale DiscussionSPCHempstead, Lafayette, Little River, Miller2 hr
Apr 27, 4:53 AM CDTSevere Thunderstorm WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more5 hr
Apr 27, 6:25 AM CDTMesoscale DiscussionSPCArkansas, Cleburne, Crittenden, Cross, Desha, Faulkner and 15 more65 min
Apr 27, 8:40 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clay, Cleburne and 28 more65 min
Apr 27, 9:48 AM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Chicot, Clark, Cleveland and 10 more27 min
Apr 27, 11:02 AM CDTTornado Watch PDSSPCAshley, Chicot8 hr
Apr 27, 12:42 PM CDTSevere Thunderstorm WatchSPCBaxter, Clay, Cleburne, Conway, Craighead, Crittenden and 19 more5 hr
Apr 27, 3:06 PM CDTMesoscale DiscussionSPCClay, Craighead, Greene, Mississippi, Poinsett54 min
Apr 27, 3:29 PM CDTTornado WatchSPCMississippi5 hr
Apr 26, 8:35 PM CDTMesoscale DiscussionSPCBreckinridge, Bullitt, Daviess, Hancock, Hardin, Henderson and 4 more55 min
Apr 27, 4:33 AM CDTMesoscale DiscussionSPCAdair, Barren, Boyle, Casey, Clinton, Cumberland and 12 more57 min
Apr 27, 5:07 AM CDTTornado WatchSPCAdair, Allen, Anderson, Barren, Bourbon, Boyle and 28 more5 hr
Apr 27, 7:34 AM CDTTornado WatchSPCBath, Bell, Breathitt, Clay, Elliott, Estill and 21 more4 hr
Apr 27, 8:39 AM CDTMesoscale DiscussionSPCBoyd, Carter, Greenup, Lewis66 min
Apr 27, 2:22 PM CDTMesoscale DiscussionSPCBell, Breathitt, Clay, Floyd, Harlan, Jackson and 11 more83 min
Apr 27, 4:38 PM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bell and 90 more37 min
Apr 27, 4:44 PM CDTTornado WatchSPCAdair, Allen, Anderson, Barren, Bath, Bell and 92 more7 hr
Apr 27, 5:27 PM CDTMesoscale DiscussionSPCCrittenden, Daviess, Henderson, Trimble, Union, Webster63 min
Apr 27, 6:22 PM CDTTornado WatchSPCBoone, Bracken, Campbell, Carroll, Gallatin, Grant and 6 more8 hr
Apr 27, 1:56 AM CDTMesoscale DiscussionSPCClarke, Copiah, Covington, Jasper, Jefferson Davis, Kemper and 11 more64 min
Apr 27, 2:26 AM CDTTornado WatchSPCAdams, Alcorn, Attala, Calhoun, Chickasaw, Choctaw and 38 more6 hr
Apr 27, 8:08 AM CDTTornado WatchSPCAlcorn, Calhoun, Carroll, Chickasaw, Choctaw, Clay and 16 more6 hr
Apr 27, 10:45 AM CDTMesoscale DiscussionSPCAdams, Attala, Benton, Calhoun, Carroll, Chickasaw and 53 more90 min
Apr 27, 1:42 PM CDTTornado Watch PDSSPCGreene, Perry, Wayne8 hr
Apr 27, 2:56 PM CDTMesoscale DiscussionSPCAlcorn, Attala, Calhoun, Chickasaw, Choctaw, Clarke and 35 more2 hr
Apr 27, 5:01 PM CDTMesoscale DiscussionSPCAttala, Chickasaw, Choctaw, Clarke, Clay, Covington and 26 more89 min
Apr 27, 6:27 PM CDTMesoscale DiscussionSPCClarke, Clay, Copiah, Covington, Forrest, Jasper and 22 more33 min
Apr 27, 6:42 PM CDTTornado WatchSPCClarke, Covington, Forrest, Jasper, Jefferson Davis, Jones and 13 more3 hr
Apr 27, 10:27 AM CDTTornado WatchSPCAnderson, Bedford, Bledsoe, Blount, Bradley, Cannon and 29 more6 hr
Apr 27, 11:39 AM CDTMesoscale DiscussionSPCBledsoe, Blount, Bradley, Cannon, Coffee, DeKalb and 16 more66 min
Apr 27, 12:08 PM CDTMesoscale DiscussionSPCBenton, Carroll, Cheatham, Chester, Crockett, Decatur and 21 more67 min
Apr 27, 1:03 PM CDTMesoscale DiscussionSPCBledsoe, Blount, Bradley, Grundy, Hamilton, Loudon and 10 more57 min
Apr 27, 1:05 PM CDTMesoscale DiscussionSPCFranklin, Giles, Lawrence, Lincoln, Marshall, Maury and 1 more85 min
Apr 27, 3:36 PM CDTTornado Watch PDSSPCAnderson, Bedford, Benton, Bledsoe, Blount, Bradley and 66 more8 hr
Apr 27, 5:38 PM CDTMesoscale DiscussionSPCAnderson, Bedford, Bledsoe, Blount, Bradley, Cannon and 36 more97 min

Nearby

Tornado Watches in Kentucky, 2011Tornado Watches in Tennessee, 2011Tornado Watches in Arkansas, 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.