Alert archive / Mississippi / Tornado Watches in 2014

Tornado Watch 106

April 28, 20144 states

The Storm Prediction Center issued this tornado watch at Apr 28, 2014, 1:43 AM CDT for 4 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Apr 28, 2014, 1:43 AM CDT (06:43 UTC)
Expired
Apr 28, 2014, 10:00 AM CDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 57 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, Randolph County, AR, St. Francis County, AR, Dunklin County, MO, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Coahoma County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 32 km from the middle of the area, began a volume at 06:44 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
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
10%
Ten or more severe hail reports
20%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 28, 2:02 AM CDTTornado WarningMEGClay, Craighead, Greene, Mississippi43 min
Apr 28, 2:16 AM CDTTornado WarningMEGCraighead, Greene, Mississippi44 min
Apr 28, 2:33 AM CDTFlash Flood WarningMEGClay, Craighead, Cross, Greene, Lawrence, Poinsett and 1 more6 hr
Apr 28, 2:36 AM CDTSevere Thunderstorm WarningMEGClay24 min
Apr 28, 2:49 AM CDTTornado WarningMEGMississippi41 min
Apr 28, 3:43 AM CDTSevere Thunderstorm WarningMEGDunklin, Pemiscot47 min
Apr 28, 4:41 AM CDTSevere Thunderstorm WarningMEGCrockett, Dyer, Gibson, Obion, Weakley49 min
Apr 28, 5:46 AM CDTSevere Thunderstorm WarningMEGLee, Phillips44 min
Apr 28, 6:22 AM CDTSevere Thunderstorm WarningMEGCrittenden38 min
Apr 28, 6:33 AM CDTSevere Thunderstorm WarningMEGCrittenden, Mississippi42 min
Apr 28, 6:50 AM CDTTornado WarningMEGFayette, Haywood, Shelby, Tipton40 min
Apr 28, 7:02 AM CDTSevere Thunderstorm WarningMEGBenton, DeSoto, Marshall, Tate43 min
Apr 28, 7:25 AM CDTFlash Flood WarningMEGShelby, Tipton3 hr
Apr 28, 7:33 AM CDTSevere Thunderstorm WarningMEGPontotoc, Prentiss, Tippah, Union42 min
Apr 28, 7:53 AM CDTSevere Thunderstorm WarningMEGBenton, Carroll, Decatur, Gibson, Henderson, Henry and 2 more52 min
Apr 28, 9:38 AM CDTSevere Thunderstorm WarningMEGDeSoto, Tate, Tunica52 min
Apr 28, 9:39 AM CDTFlash Flood WarningMEGBenton, Decatur, Henderson4 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

Little Rock, AR (KBYH), launched 00:00Z, 6.7 hours before the alert went out and 76 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, Little Rock, AR at 00:00Z on 2014-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2449 joules per kilogram.LCLLFCEL10008507005003002001001 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, Little Rock, AR at 00:00Z on 2014-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 480 square meters per square second.19395878Sfc1 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
2449 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
619 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
480 m²/s²
0-3 km storm-relative helicity
618 m²/s²
Significant tornado parameter
8.8
Supercell composite
40.3

Open this sounding in Storm Lab

The text

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

948 
WWUS20 KWNS 280645
SEL6  
SPC WW 280645
ARZ000-MOZ000-MSZ000-TNZ000-281300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 106
NWS STORM PREDICTION CENTER NORMAN OK
145 AM CDT MON APR 28 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  NORTHEAST ARKANSAS
  MISSOURI BOOTHEEL
  NORTHWEST MISSISSIPPI
  WESTERN TENNESSEE

* EFFECTIVE THIS MONDAY MORNING FROM 145 AM UNTIL 800 AM CDT.

* PRIMARY THREATS INCLUDE...
  A FEW TORNADOES AND A COUPLE INTENSE TORNADOES POSSIBLE
  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHWEST OF
DYERSBURG TENNESSEE TO 35 MILES SOUTHWEST OF OXFORD MISSISSIPPI. 
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 102...WW 103...WW
104...WW 105...

DISCUSSION...TSTMS ARE EXPECTED TO PERSIST THROUGH THE EARLY MORNING
HOURS WITHIN A MODERATELY UNSTABLE AND STRONGLY SHEARED ENVIRONMENT.
AS SUCH...ANY SUSTAINED STORMS WILL BE CAPABLE OF
TORNADOES...DAMAGING WINDS AND HAIL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 23035.


...MEAD

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 27, 7:15 PM CDTMesoscale DiscussionSPCFaulkner30 min
Apr 27, 7:29 PM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Mississippi and 1 more91 min
Apr 27, 7:53 PM CDTTornado WatchSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 4 more6 hr
Apr 27, 8:09 PM CDTMesoscale DiscussionSPCColumbia, Lafayette, Miller, Union66 min
Apr 27, 8:43 PM CDTMesoscale DiscussionSPCClark, Clay, Cleburne, Cleveland, Conway, Craighead and 45 more62 min
Apr 27, 9:59 PM CDTMesoscale DiscussionSPCCalhoun, Clark, Cleburne, Cleveland, Columbia, Conway and 36 more91 min
Apr 27, 10:33 PM CDTTornado WatchSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 27 more7 hr
Apr 27, 11:08 PM CDTTornado WatchSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more6 hr
Apr 27, 11:21 PM CDTMesoscale DiscussionSPCArkansas, Baxter, Boone, Bradley, Calhoun, Carroll and 38 more84 min
Apr 27, 11:41 PM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Mississippi and 2 more94 min
Apr 28, 2:50 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 25 more115 min
Apr 28, 4:21 AM CDTMesoscale DiscussionSPCAshley, Bradley, Chicot, Columbia, Drew, Union54 min
Apr 28, 4:40 AM CDTTornado WatchSPCAshley, Chicot, Union7 hr
Apr 28, 7:16 AM CDTMesoscale DiscussionSPCChicot89 min
Apr 28, 9:53 AM CDTMesoscale DiscussionSPCChicot97 min
Apr 27, 7:03 PM CDTMesoscale DiscussionSPCCalhoun, Chickasaw, Clay, Grenada, Itawamba, Lafayette and 10 more87 min
Apr 28, 6:57 AM CDTMesoscale DiscussionSPCAlcorn, Benton, Lafayette, Lee, Marshall, Pontotoc and 4 more2 hr
Apr 28, 12:05 PM CDTMesoscale DiscussionSPCAdams, Alcorn, Attala, Benton, Calhoun, Carroll and 40 more115 min
Apr 28, 12:39 PM CDTTornado Watch PDSSPCAdams, Alcorn, Attala, Benton, Calhoun, Carroll and 48 more8 hr
Apr 28, 2:09 PM CDTMesoscale DiscussionSPCAlcorn, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 32 more66 min
Apr 28, 3:49 PM CDTMesoscale DiscussionSPCChoctaw, Clay, Itawamba, Leake, Lowndes, Monroe and 4 more86 min
Apr 28, 5:22 PM CDTMesoscale DiscussionSPCAttala, Chickasaw, Choctaw, Clay, Hinds, Holmes and 18 more83 min
Apr 27, 8:40 PM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Camden, Carroll and 35 more65 min
Apr 28, 1:43 AM CDTMesoscale DiscussionSPCCape Girardeau, Franklin, Gasconade, Iron, Jefferson, Madison and 7 more92 min
Apr 28, 12:54 PM CDTMesoscale DiscussionSPCAudrain, Callaway, Clark, Crawford, Franklin, Gasconade and 19 more2 hr
Apr 28, 1:11 PM CDTTornado WatchSPCAudrain, Callaway, Clark, Crawford, Franklin, Gasconade and 16 more7 hr
Apr 28, 3:13 PM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Mississippi, New Madrid, Perry, Scott and 1 more2 hr
Apr 28, 3:38 PM CDTMesoscale DiscussionSPCClark, Jefferson, Lincoln, Pike, Saint Charles, Saint Louis and 1 more2 hr
Apr 28, 4:30 AM CDTMesoscale DiscussionSPCClay, Macon, Montgomery, Robertson, Sumner90 min
Apr 28, 12:50 PM CDTMesoscale DiscussionSPCAnderson, Bedford, Bledsoe, Bradley, Campbell, Cannon and 33 more55 min
Apr 28, 1:33 PM CDTTornado WatchSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more5 hr
Apr 28, 3:12 PM CDTMesoscale DiscussionSPCBlount, Carter, Claiborne, Cocke, Grainger, Greene and 13 more63 min
Apr 28, 5:37 PM CDTTornado Watch PDSSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 25 more6 hr

Nearby

Tornado Watches in Mississippi, 2014Tornado Watches in Tennessee, 2014Tornado Watches in Arkansas, 2014Every tornado watch in 2014

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.