Alert archive / Tennessee / Special Weather Statements in 2012

Special Weather Statement, NWS Memphis, TN

July 20, 2012Henry County, Tennessee

NWS Memphis, TN issued this special weather statement at Jul 20, 2012, 3:14 PM CDT for Henry County, Tennessee. It was in force for 31 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
Jul 20, 2012, 3:14 PM CDT (20:14 UTC)
Expired
Jul 20, 2012, 3:45 PM CDT
In force
31 min
Issued by
NWS Memphis, TN

County Henry County, TN

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 8.2 hours before the alert went out and 217 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 2012-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1326 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 2012-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.1939Sfc1 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
1326 J/kg
Mixed-layer CIN
-175 J/kg
Mixed-layer LCL
1689 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
114 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.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 20, 12:55 PM CDT, 2 hours 19 minutes earlier.

Area forecast discussion, Jul 20, 12:55 PM CDT, 2 hours 19 minutes before
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Hazardous weather outlook, Jul 20, 5:23 AM CDT, 9 hours 51 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MEMPHIS TN
523 AM CDT FRI JUL 20 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>092-211230-
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-
523 AM CDT FRI JUL 20 2012

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

.DAY ONE...TODAY AND TONIGHT
AN EXCESSIVE HEAT WARNING IS IN EFFECT FOR MUCH OF EAST
ARKANSAS...NORTH MISSISSIPPI AND WEST TENNESSEE TODAY INTO
TONIGHT GENERALLY ALONG AND TO THE SOUTH OF A LINE FROM
JONESBORO ARKANSAS TO DYERSBURG TENNESSEE AND WEST OF A LINE FROM
JACKSON TENNESSEE TO OXFORD MISSISSIPPI. A HEAT ADVISORY IS IN
EFFECT ELSEWHERE.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY GENERALLY
SOUTH OF A LINE FROM PARIS TENNESSEE...TO MILLINGTON TENNESSEE TO
FORREST CITY ARKANSAS. THE MAIN THREAT FROM THESE STORMS IS
DAMAGING WIND...ALTHOUGH LARGE HAIL IS ALSO POSSIBLE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE TODAY FOR THE SLIGHT RISK AREA.

In the hours before

Special weather statement, Jul 20, 3:14 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
314 PM CDT FRI JUL 20 2012

TNZ004-021-202045-
CARROLL TN-HENRY TN-
314 PM CDT FRI JUL 20 2012

...THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY UNTIL 345 PM CDT FOR...

  NORTHEASTERN CARROLL COUNTY IN NORTHWEST TENNESSEE...
  CENTRAL HENRY COUNTY IN NORTHWEST TENNESSEE...

A STRONG THUNDERSTORM PRODUCING WIND GUSTS TO 50 MPH AND PEA SIZE
HAIL WAS LOCATED 4 MILES EAST OF PARIS AT 314 PM CDT...MOVING SOUTH
AT 20 MPH.

PEOPLE IN CARROLL AND HENRY COUNTIES...INCLUDING LOCATIONS NEAR
PARIS...SHOULD MONITOR THIS STORM CLOSELY.

&&

LAT...LON 3618 8816 3615 8817 3612 8820 3602 8821
      3604 8841 3637 8835 3635 8812 3620 8813
TIME...MOT...LOC 2014Z 005DEG 16KT 3627 8824

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 9:47 PM CDTExcessive Heat WatchMEGAlcorn, Benton, Coahoma, DeSoto, Lafayette, Marshall and 7 more6 hr
Jul 20, 4:04 AM CDTExcessive Heat WarningMEGAlcorn, Benton, Coahoma, DeSoto, Lafayette, Marshall and 7 more15 hr
Jul 20, 5:31 PM CDTSpecial Weather StatementMEGMarshall29 min
Jul 20, 5:37 PM CDTSevere Thunderstorm WarningMEGBenton, Marshall38 min
Jul 20, 3:50 PM CDTSpecial Weather StatementMEGCarroll25 min
Jul 20, 5:15 PM CDTSpecial Weather StatementMEGCarroll30 min
Jul 20, 6:18 PM CDTSpecial Weather StatementMEGMadison27 min

Nearby

Special Weather Statements in Tennessee, 2012Every special weather statement 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.