Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 108, NWS Memphis, TN

March 15, 2012Carroll County, Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at Mar 15, 2012, 3:55 PM CDT for Carroll County, Tennessee. It was in force for 13 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 15, 2012, 3:55 PM CDT (20:55 UTC)
Expired: Mar 15, 2012, 4:08 PM CDT
In force: 13 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon

County Carroll County, TN

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.9 hours before the alert went out and 153 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1726 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 820 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 108 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.

068 
WUUS54 KMEG 152055
SVRMEG
TNC017-152130-
/O.NEW.KMEG.SV.W.0108.120315T2055Z-120315T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
355 PM CDT THU MAR 15 2012

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CARROLL COUNTY IN NORTHWEST TENNESSEE...

* UNTIL 430 PM CDT

* AT 356 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR WESTPORT...
  OR 8 MILES NORTH OF NATCHEZ TRACE STATE PARK...AND MOVING NORTHEAST
  AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BUENA
  VISTA...GARRETSBURG...DOLLAR...WESTPORT AND YUMA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

.STAY TUNED TO THIS BROADCAST FOR THE LATEST UPDATES AND INFORMATION.
TO REPORT SEVERE WEATHER ONLY...CALL 1 800 4 3 2 0 8 7 5.

&&

LAT...LON 3582 8834 3592 8840 3604 8821 3603 8820
      3585 8821
TIME...MOT...LOC 2056Z 239DEG 16KT 3588 8829

$$

1 follow-up statement

430 
WWUS54 KMEG 152108
SVSMEG

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
408 PM CDT THU MAR 15 2012

TNC017-152118-
/O.CAN.KMEG.SV.W.0108.000000T0000Z-120315T2130Z/
CARROLL TN-
408 PM CDT THU MAR 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARROLL COUNTY IS
CANCELLED...

AT 408 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE 
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE WEAKENED...AND NO 
LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY. THEREFORE...THE 
SEVERE THUNDERSTORM WARNING IS CANCELLED.

LAT...LON 3582 8834 3592 8840 3604 8821 3603 8820
      3585 8821
TIME...MOT...LOC 2108Z 239DEG 16KT 3591 8823

$$

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Memphis, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 15, 3:16 PM CDT, 39 minutes earlier.

Area forecast discussion, Mar 15, 3:16 PM CDT, 39 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEMPHIS TN
316 PM CDT THU MAR 15 2012

.DISCUSSION...

SKIES ARE PARTLY TO MOSTLY SUNNY OVER MOST OF THE FORECAST AREA
THIS AFTERNOON WITH TEMPERATURES RANGING FROM THE UPPER 70S TO
LOWER 80S. SHOWERS AND THUNDERSTORMS ARE MOVING ACROSS MAINLY
EASTERN SECTIONS OF WEST TENNESSEE. SOME OF THESE THUNDERSTORMS
HAVE BEEN SEVERE WITH LARGE HAIL AS THE MAIN THREAT SO FAR.
ADDITIONAL THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS EVENING AS
AN UPPER LEVEL DISTURBANCE MOVES THROUGH THE REGION. SOME
ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE TONIGHT WITH LARGE HAIL
AND DAMAGING WINDS AS THE MAIN THREATS.

ON FRIDAY...ANOTHER UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE
REGION BRINGING MORE SCATTERED SHOWERS AND THUNDERSTORMS. AT THIS
POINT IT SEEMS THAT THERE MAY NOT BE SEVERE THUNDERSTORMS FRIDAY
BUT CAN'T RULE OUT AN ISOLATED THUNDERSTORM WITH LARGE HAIL OR
DAMAGING WINDS. THIS DISTURBANCE SHOULD MOVE OUT OF THE REGION
FRIDAY AFTERNOON SO FRIDAY NIGHT SHOULD REMAIN DRY. ANOTHER
DISTURBANCE WILL WILL MOVE THROUGH THE REGION ON SATURDAY BRINGING
A SMALL CHANCE OF THUNDERSTORMS.

UPPER LEVEL RIDGE WILL BUILD BACK INTO THE REGION STARTING
SATURDAY NIGHT AND REMAIN THROUGH AT LEAST MONDAY. THIS WILL MEAN
DRY WEATHER WITH TEMPERATURES REMAINING WELL ABOVE NORMAL. BY
TUESDAY...A LARGE UPPER LEVEL TROUGH WILL MOVE OUT OF THE SOUTHERN
ROCKIES AND INTO THE SOUTHERN PLAINS. AS IT DOES..SHOWERS AND
THUNDERSTORMS ARE EXPECTED TO DEVELOP WITH SOME OF THIS ACTIVITY
MOVING ACROSS THE FORECAST AREA. AS THE UPPER TROUGH MOVES EAST
THE CHANCE OF THUNDERSTORMS WILL INCREASE SOME FOR WEDNESDAY AND
THURSDAY. TEMPERATURES WILL REMAIN WELL ABOVE NORMAL ON WEDNESDAY
BUT COOLER DOWN SOME FOR THURSDAY.

ARS

&&

.AVIATION...

VFR CEILINGS WILL PERSIST THROUGH THE PERIOD WITH THE EXCEPTION OF
LOCATIONS THAT GET DIRECTLY IMPACTED BY THUNDERSTORMS. IN THIS
SITUATION...CIGS WOULD DROP TO SUB-VFR CONDITIONS...BUT CONFIDENCE
IN A DIRECT IMPACT AT ANY TAF SITE IS TOO LOW AT THIS TIME.
MAINTAINED VCTS AT ALL SITES THROUGH THIS EVENING WITH GUSTY
SOUTHWEST WINDS CONTINUING.

THUNDERSTORM CHANCES MAY DIMINISH THIS EVENING BUT THERE STILL MAY
BE SOME STORM ACTIVITY THEREFORE MAINTAINED A CB GROUP. ADDITIONAL
THUNDERSTORM POTENTIAL WILL DEVELOP AGAIN ON FRIDAY. LIGHT WINDS
WILL PERSIST TONIGHT THEN INCREASE AGAIN FROM THE SOUTHWEST ON
FRIDAY MORNING.

JLH

&&

.PRELIMINARY POINT TEMPS/POPS...
MEM  65  82  63  82 /  40  40  10  20
MKL  60  80  57  82 /  40  40  20  20
JBR  60  79  59  79 /  40  40  20  20
TUP  61  81  59  84 /  40  40  10  20

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...NONE.
MO...NONE.
MS...NONE.
TN...NONE.
&&

Hazardous weather outlook, Mar 15, 3:21 PM CDT, 34 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MEMPHIS TN
321 PM CDT THU MAR 15 2012

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-
MSZ001>017-020>024-TNZ001>004-019>021-048>055-088>092-162230-
ALCORN-BENTON MS-CALHOUN-CARROLL-CHESTER-CHICKASAW-CLAY-COAHOMA-
CRAIGHEAD-CRITTENDEN-CROCKETT-CROSS-DESOTO-DECATUR-DUNKLIN-DYER-
FAYETTE-GIBSON-GREENE-HARDEMAN-HARDIN-HAYWOOD-HENDERSON-HENRY-
ITAWAMBA-LAFAYETTE-LAKE-LAUDERDALE-LAWRENCE-LEE AR-LEE MS-MADISON-
MARSHALL-MCNAIRY-MISSISSIPPI-MONROE-OBION-PANOLA-PEMISCOT-
PHILLIPS-POINSETT-PONTOTOC-PRENTISS-QUITMAN-RANDOLPH-SHELBY-
ST. FRANCIS-TALLAHATCHIE-TATE-TIPPAH-TIPTON-TISHOMINGO-TUNICA-
UNION-WEAKLEY-YALOBUSHA-
321 PM CDT THU MAR 15 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST ARKANSAS...
THE MISSOURI BOOTHEEL...NORTH MISSISSIPPI...AND WEST TENNESSEE.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
TONIGHT MAINLY NORTH OF A LINE FROM MARIANNA ARKANSAS TO
BOONEVILLE MISSISSIPPI. LARGE HAIL...DAMAGING WINDS AND LOCALIZED
FLASH FLOODING WILL BE THE MAIN THREATS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

ADDITIONAL CHANCES FOR STRONG TO POTENTIALLY SEVERE THUNDERSTORMS
WILL BE POSSIBLE ON FRIDAY AND AGAIN DURING THE MIDDLE OF NEXT
WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT.

In the hours before

Special weather statement, Mar 15, 1:42 PM CDT, 2 hours 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
142 PM CDT THU MAR 15 2012

TNZ090-151915-
HARDEMAN TN-
142 PM CDT THU MAR 15 2012

...THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY UNTIL 215 PM CDT FOR...

  HARDEMAN COUNTY IN SOUTHWEST TENNESSEE...

A STRONG THUNDERSTORM PRODUCING NICKEL SIZE HAIL AND WINDS AT LEAST
40 MPH WAS LOCATED 5 MILES SOUTHWEST OF BOLIVAR AT 142 PM
CDT...MOVING NORTHEAST AT 20 MPH.

VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE
ALSO POSSIBLE WITH THIS THUNDERSTORM.

PEOPLE IN HARDEMAN COUNTY...INCLUDING LOCATIONS NEAR BOLIVAR AND
CHICKASAW STATE FOREST...SHOULD MONITOR THIS STORM CLOSELY.

&&

LAT...LON 3509 8907 3525 8917 3543 8886 3524 8878
      3523 8878
TIME...MOT...LOC 1842Z 237DEG 16KT 3522 8902

Special weather statement, Mar 15, 1:51 PM CDT, 2 hours 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
151 PM CDT THU MAR 15 2012

TNZ089-090-151915-
FAYETTE TN-HARDEMAN TN-
151 PM CDT THU MAR 15 2012

...THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY UNTIL 215 PM CDT FOR...

  SOUTHEASTERN FAYETTE COUNTY IN SOUTHWEST TENNESSEE...
  WEST CENTRAL HARDEMAN COUNTY IN SOUTHWEST TENNESSEE...

A STRONG THUNDERSTORM PRODUCING PENNY SIZE HAIL OR LARGER AND WINDS
AT LEAST 40 MPH WAS LOCATED 3 MILES NORTHWEST OF LAGRANGE AT 152 PM
CDT...MOVING NORTHEAST AT 20 MPH.

VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE
ALSO POSSIBLE WITH THIS THUNDERSTORM.

PEOPLE IN FAYETTE AND HARDEMAN COUNTIES SHOULD MONITOR THIS STORM
CLOSELY.

&&

LAT...LON 3509 8906 3499 8927 3500 8930 3509 8939
      3526 8917
TIME...MOT...LOC 1852Z 228DEG 18KT 3510 8923

Local storm report, Mar 15, 3:20 PM CDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
320 PM CDT THU MAR 15 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0242 PM     HAIL             TOONE                   35.35N 88.95W
03/15/2012  E1.00 INCH       HARDEMAN           TN   EMERGENCY MNGR

            QUARTER SIZE HAIL...SOME PIECES POSSIBLY LARGER...IN
            TOONE.

0245 PM     HAIL             LEXINGTON               35.65N 88.39W
03/15/2012  E1.00 INCH       HENDERSON          TN   TRAINED SPOTTER

0249 PM     HAIL             BUCHANAN                36.41N 88.17W
03/15/2012  E1.00 INCH       HENRY              TN   TRAINED SPOTTER

            DIME TO QUARTER SIZE HAIL IN BUCHANAN

0250 PM     HAIL             LEXINGTON               35.65N 88.39W
03/15/2012  E0.88 INCH       HENDERSON          TN   TRAINED SPOTTER

0256 PM     HAIL             MEDON                   35.46N 88.87W
03/15/2012  E1.00 INCH       MADISON            TN   TRAINED SPOTTER

0305 PM     HAIL             BOLIVAR                 35.26N 89.00W
03/15/2012  E1.00 INCH       HARDEMAN           TN   TRAINED SPOTTER

            QUARTER SIZE HAIL...POSSIBLY SOME PIECES LARGER...ON HWY
            64 JUST WEST OF BOLIVAR.

&&

RRH

Special weather statement, Mar 15, 3:47 PM CDT, 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
347 PM CDT THU MAR 15 2012

TNZ021-152115-
CARROLL TN-
347 PM CDT THU MAR 15 2012

...THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY UNTIL 415 PM CDT FOR...

  SOUTHEASTERN CARROLL COUNTY IN NORTHWEST TENNESSEE...

A STRONG THUNDERSTORM PRODUCING PENNY SIZE HAIL OR LARGER AND WINDS
AT LEAST 40 MPH WAS LOCATED OVER YUMA AT 347 PM CDT...MOVING
NORTHEAST AT 20 MPH.

VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE
ALSO POSSIBLE WITH THIS THUNDERSTORM.

PEOPLE IN CARROLL COUNTY SHOULD MONITOR THIS STORM CLOSELY.

&&

LAT...LON 3582 8833 3582 8839 3590 8844 3602 8821
      3585 8821 3585 8818 3584 8818
TIME...MOT...LOC 2047Z 243DEG 16KT 3586 8833

Special weather statement, Mar 15, 3:48 PM CDT, 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
348 PM CDT THU MAR 15 2012

TNZ090-091-152115-
HARDEMAN TN-MCNAIRY TN-
348 PM CDT THU MAR 15 2012

...THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY UNTIL 415 PM CDT FOR...

  SOUTHEASTERN HARDEMAN COUNTY IN SOUTHWEST TENNESSEE...
  CENTRAL MCNAIRY COUNTY IN SOUTHWEST TENNESSEE...

A STRONG THUNDERSTORM PRODUCING PENNY SIZE HAIL OR LARGER AND WINDS
AT LEAST 40 MPH WAS LOCATED 5 MILES NORTHWEST OF POCAHONTAS AT 348 PM
CDT...MOVING NORTHEAST AT 20 MPH.

VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE
ALSO POSSIBLE WITH THIS THUNDERSTORM.

PEOPLE IN HARDEMAN AND MCNAIRY COUNTIES...INCLUDING LOCATIONS NEAR
SELMER...SHOULD MONITOR THIS STORM CLOSELY.

&&

LAT...LON 3515 8844 3499 8891 3513 8900 3525 8874
      3525 8873 3527 8871 3534 8855
TIME...MOT...LOC 2048Z 243DEG 16KT 3511 8886

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 15, 1:42 PM CDT	Special Weather Statement	MEG	Hardeman	33 min
Mar 15, 1:51 PM CDT	Special Weather Statement	MEG	Fayette	24 min
Mar 15, 2:05 PM CDT	Severe Thunderstorm Warning	MEG	Fayette, Hardeman	25 min
Mar 15, 2:28 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Hardeman, Madison	32 min
Mar 15, 2:29 PM CDT	Severe Thunderstorm Warning	MEG	Hardeman	31 min
Mar 15, 2:49 PM CDT	Severe Thunderstorm Warning	MEG	Henry	24 min
Mar 15, 2:50 PM CDT	Severe Thunderstorm Warning	MEG	Henderson	25 min
Mar 15, 2:54 PM CDT	Flash Flood Warning	MEG	Chester, Hardeman, Madison	96 min
Mar 15, 2:59 PM CDT	Severe Thunderstorm Warning	MEG	Hardeman	31 min
Mar 15, 3:00 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Henderson, Madison	27 min
Mar 15, 3:07 PM CDT	Severe Thunderstorm Warning	MEG	Decatur, Henderson	26 min
Mar 15, 3:47 PM CDT	Special Weather Statement	MEG	Carroll	28 min
Mar 15, 3:48 PM CDT	Special Weather Statement	MEG	McNairy	27 min
Mar 15, 3:52 PM CDT	Severe Thunderstorm Warning	MEG	Hardeman, McNairy	36 min
Mar 15, 4:33 PM CDT	Special Weather Statement	MEG	McNairy	27 min
Mar 15, 4:40 PM CDT	Severe Thunderstorm Warning	MEG	Hardin, McNairy	35 min
Mar 15, 5:14 PM CDT	Severe Thunderstorm Warning	MEG	Hardin	31 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2012 Every severe thunderstorm warning in 2012

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.