Alert archive / Tennessee / Tornado Watches in 2014

Tornado Watch 271

June 9, 201412 counties in Alabama; 15 counties in Mississippi; 37 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Jun 9, 2014, 5:30 PM CDT for 12 counties in Alabama; 15 counties in Mississippi; 37 counties in Tennessee. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Jun 9, 2014, 5:30 PM CDT (22:30 UTC)
Expired
Jun 10, 2014, 1:00 AM CDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 64 counties

Colbert County, AL, Cullman County, AL, Fayette County, AL, Franklin County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Marion County, AL, Morgan County, AL, Walker County, AL, Winston County, AL, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Yalobusha County, MS, Benton 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, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Robertson County, TN, Stewart County, TN, Tipton County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN

The radar

The Memphis radar (KNQA), 134 km from the middle of the area, began a volume at 22:31 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
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
60%
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
5%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 9, 5:46 PM CDTSevere Thunderstorm WarningMEGCalhoun, Chickasaw44 min
Jun 9, 5:57 PM CDTSevere Thunderstorm WarningMEGBenton, Lafayette, Marshall, Tippah, Union48 min
Jun 9, 6:30 PM CDTSevere Thunderstorm WarningMEGChickasaw, Lee, Monroe, Pontotoc, Tippah, Union45 min
Jun 9, 6:53 PM CDTFlash Flood WarningMEGBenton, Tippah3 hr
Jun 9, 7:02 PM CDTSevere Thunderstorm WarningMEGChickasaw, Itawamba, Lee, Monroe, Prentiss, Tishomingo43 min
Jun 9, 7:13 PM CDTFlash Flood WarningMEGMadison3 hr
Jun 9, 7:16 PM CDTFlash Flood WarningMEGAlcorn3 hr
Jun 9, 7:18 PM CDTFlash Flood WarningMEGDecatur3 hr
Jun 9, 7:19 PM CDTSevere Thunderstorm WarningBMXLamar56 min
Jun 9, 7:30 PM CDTFlash Flood WarningMEGChester, Hardeman, McNairy3 hr
Jun 9, 7:34 PM CDTSevere Thunderstorm WarningBMXMarion56 min
Jun 9, 7:43 PM CDTSevere Thunderstorm WarningBMXFayette62 min
Jun 9, 7:45 PM CDTFlash Flood WarningMEGHenderson3 hr
Jun 9, 7:54 PM CDTSevere Thunderstorm WarningHUNColbert, Lauderdale36 min
Jun 9, 7:58 PM CDTSevere Thunderstorm WarningHUNColbert, Franklin32 min
Jun 9, 8:02 PM CDTSevere Thunderstorm WarningHUNFranklin28 min
Jun 9, 8:05 PM CDTSevere Thunderstorm WarningBMXWinston55 min
Jun 9, 8:06 PM CDTSevere Thunderstorm WarningOHXWayne39 min
Jun 9, 8:19 PM CDTSevere Thunderstorm WarningHUNColbert, Franklin, Lauderdale, Lawrence26 min
Jun 9, 8:29 PM CDTSevere Thunderstorm WarningBMXWalker61 min
Jun 9, 8:31 PM CDTSevere Thunderstorm WarningOHXLawrence, Lewis, Perry, Wayne44 min
Jun 9, 8:45 PM CDTSevere Thunderstorm WarningHUNColbert, Cullman, Lauderdale, Lawrence, Limestone, Morgan30 min
Jun 9, 8:58 PM CDTSevere Thunderstorm WarningOHXGiles, Hickman, Lawrence, Lewis, Maury, Perry and 1 more32 min
Jun 9, 9:14 PM CDTSevere Thunderstorm WarningHUNCullman, Limestone, Madison, Marshall, Morgan31 min
Jun 9, 9:21 PM CDTSevere Thunderstorm WarningOHXBedford, Giles, Hickman, Marshall, Maury, Williamson39 min
Jun 9, 9:31 PM CDTSevere Thunderstorm WarningBMXBlount, Walker45 min
Jun 9, 9:45 PM CDTSevere Thunderstorm WarningHUNJackson, Madison, Marshall, Morgan30 min
Jun 9, 9:47 PM CDTSevere Thunderstorm WarningHUNCullman28 min
Jun 9, 9:48 PM CDTSevere Thunderstorm WarningOHXBedford, Coffee, Hickman, Marshall, Maury, Rutherford and 1 more27 min
Jun 9, 10:03 PM CDTSevere Thunderstorm WarningOHXCheatham, Davidson, Dickson, Robertson, Williamson42 min
Jun 9, 10:14 PM CDTSevere Thunderstorm WarningOHXBedford, Cannon, Coffee, Davidson, Grundy, Rutherford and 3 more31 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

Little Rock, AR (KBYH), launched 12:00Z, 10.5 hours before the alert went out and 158 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 12:00Z on 2014-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 40 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 12:00Z on 2014-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 162 square meters per square second.193958Sfc1 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
40 J/kg
Mixed-layer CIN
-187 J/kg
Mixed-layer LCL
453 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
162 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

063 
WWUS20 KWNS 092237
SEL1  
SPC WW 092237
ALZ000-MSZ000-TNZ000-100600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 271
NWS STORM PREDICTION CENTER NORMAN OK
535 PM CDT MON JUN 9 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  NORTHWEST ALABAMA
  NORTHERN MISSISSIPPI
  WESTERN AND MIDDLE TENNESSEE

* EFFECTIVE THIS MONDAY AFTERNOON AND TUESDAY MORNING FROM 535 PM
  UNTIL 100 AM CDT.

* PRIMARY THREATS INCLUDE...
  A COUPLE TORNADOES POSSIBLE
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY
  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 80 MILES WEST NORTHWEST OF
NASHVILLE TENNESSEE TO 45 MILES SOUTHEAST OF TUPELO MISSISSIPPI. 
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).

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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 268. WATCH NUMBER 268 WILL NOT BE IN EFFECT AFTER
535 PM CDT. CONTINUE...WW 267...WW 269...WW 270...

DISCUSSION...NRN END OF N-S LWR MS VLY SQLN EXPECTED TO CONTINUE
ENEWD THROUGH LATE EVE...IN TANDEM WITH BAND OF 30-40 KT LOW TO
MID-TROPOSPHERIC SW FLOW IN SE QUADRANT OF KS-OK UPR LOW. THIS BAND
OF ENHANCED FLOW...COUPLED WITH HIGH PW AND SLIGHTLY-BACKED NEAR-SFC
WINDS INVOF DIFFUSE WARM FRONT/SFC TROUGH OVER NRN MS/WRN
TN...SUGGESTS SOME RISK FOR TORNADOES...BOTH WITH STORMS IN THE SQLN
AND THOSE FORMING AHEAD OF IT. LOCALLY DMGG WIND ALSO MAY OCCUR WITH
EMBEDDED LEWPS/SMALL BOWS IN THE LINE.

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 22030.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 8, 7:09 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Butler, Chilton and 32 more2 hr
Jun 9, 2:07 AM CDTMesoscale DiscussionSPCColbert, Fayette, Franklin, Lamar, Marion, Pickens83 min
Jun 9, 4:54 PM CDTMesoscale DiscussionSPCColbert, Cullman, Fayette, Franklin, Greene, Lamar and 11 more96 min
Jun 9, 5:16 PM CDTSevere Thunderstorm WatchSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 20 more8 hr
Jun 9, 5:19 PM CDTMesoscale DiscussionSPCColbert, Franklin, Lauderdale, Lawrence, Marion26 min
Jun 9, 6:55 PM CDTMesoscale DiscussionSPCColbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 5 more95 min
Jun 8, 7:47 PM CDTMesoscale DiscussionSPCAdams, Attala, Bolivar, Calhoun, Carroll, Chickasaw and 33 more88 min
Jun 8, 8:41 PM CDTSevere Thunderstorm WatchSPCAlcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 46 more7 hr
Jun 8, 10:53 PM CDTMesoscale DiscussionSPCAlcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 42 more97 min
Jun 9, 9:39 AM CDTMesoscale DiscussionSPCBolivar, Humphreys, Issaquena, Sharkey, Sunflower, Washington and 1 more2 hr
Jun 9, 11:40 AM CDTSevere Thunderstorm WatchSPCAttala, Bolivar, Carroll, Claiborne, Coahoma, Grenada and 18 more7 hr
Jun 9, 1:54 PM CDTMesoscale DiscussionSPCAlcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 25 more96 min
Jun 9, 2:14 PM CDTTornado WatchSPCAlcorn, Benton, Coahoma, DeSoto, Lafayette, Marshall and 7 more5 hr
Jun 9, 3:22 PM CDTMesoscale DiscussionSPCAdams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 15 more83 min
Jun 9, 3:43 PM CDTMesoscale DiscussionSPCBenton, DeSoto, Lafayette, Marshall, Panola, Quitman and 4 more92 min

Nearby

Tornado Watches in Tennessee, 2014Tornado Watches in Mississippi, 2014Tornado Watches in Alabama, 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.