Alert archive / Tennessee / Flash Flood Warnings in 2012

Flash Flood Warning 44, NWS Memphis, TN

August 17, 20127 counties in Tennessee

NWS Memphis, TN issued this flash flood warning at Aug 17, 2012, 1:05 AM CDT for 7 counties in Tennessee. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 17, 2012, 1:05 AM CDT (06:05 UTC)
Expired
Aug 17, 2012, 4:00 AM CDT
In force
3 hr
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Flood severity
None

Counties Chester County, TN, Decatur County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Madison County, TN, McNairy County, TN

The nearest sounding before it

Little Rock, AR (KBYH), launched 00:00Z, 6.1 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-pSkew-T log-p diagram, Little Rock, AR at 00:00Z on 2012-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2007 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 00:00Z on 2012-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 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
2007 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
1896 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
79 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.

200 
WGUS54 KMEG 170605
FFWMEG
TNC023-039-069-071-077-109-113-170900-
/O.NEW.KMEG.FF.W.0044.120817T0605Z-120817T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
105 AM CDT FRI AUG 17 2012

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN DECATUR COUNTY IN TENNESSEE...
  CHESTER COUNTY IN SOUTHWEST TENNESSEE...
  NORTHEASTERN HARDEMAN COUNTY IN SOUTHWEST TENNESSEE...
  HARDIN COUNTY IN SOUTHWEST TENNESSEE...
  SOUTHERN HENDERSON COUNTY IN SOUTHWEST TENNESSEE...
  SOUTHEASTERN MADISON COUNTY IN SOUTHWEST TENNESSEE...
  MCNAIRY COUNTY IN SOUTHWEST TENNESSEE...

* UNTIL 400 AM CDT

* AT 105 AM CDT...DOPPLER RADAR ESTIMATES 1 TO 3 INCHES OF RAINFALL
  HAS OCCURRED OVER THE PAST HOUR. SHOWERS AND THUNDERSTORMS WILL
  PRODUCE AN ADDITIONAL 1 TO 3 INCHES OF RAIN OVER THE NEXT 2 HOURS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HENDERSON...SAVANNAH...SELMER...BIG HILL POND STATE PARK...
  CHICKASAW STATE PARK AND PICKWICK LANDING STATE PARK.

 THIS WARNING ALSO INCLUDES AREAS NEAR BEECH LAKE...PIN OAK LAKE AND
  PINE LAKE.

THIS WARNING INCLUDES THE FOLLOWING LOW WATER CROSSINGS IN DECATUR
COUNTY BEAR CREEK AT OLD LEXINGTON ROAD...BLUNT ROAD AT RUSHING
CREEK...BUCKNER BRANCH AT BIBLE HILL ROAD...BUCKNER BRANCH AT
NORTHWOOD STREET...CONCORD ROAD NEAR OLD 69...ELIZABETH STREET...
FAIRGROUND ROAD...LARGO ROAD...LASTER BRANCH AT CONCORD ROAD...MARTIN
LANDING ROAD AT CAMPBELLS BRANCH...MT CARMEL ROAD AT ELKINS BRANCH...
ROBERT GURLEY ROAD AT STEWMAN CREEK...ROCKY BRANCH AT BIBLE HILL
ROAD...RUSHING CREEK AT LARGO ROAD...SCENIC LANE AT SELF SLOUGH AND
SULFUR FORK AT BIBLE HILL ROAD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

.BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

.MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE
INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE
USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS
POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING
FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

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

&&

LAT...LON 3500 8876 3546 8885 3552 8892 3558 8858
      3559 8803 3547 8802 3544 8804 3543 8801
      3502 8798

$$
1 follow-up statement
815 
WGUS74 KMEG 170851 RRA
FFSMEG

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
351 AM CDT FRI AUG 17 2012

TNC023-039-069-071-077-109-113-170901-
/O.EXP.KMEG.FF.W.0044.000000T0000Z-120817T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHESTER TN-DECATUR TN-HARDEMAN TN-HARDIN TN-HENDERSON TN-MCNAIRY TN-
MADISON TN-
351 AM CDT FRI AUG 17 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 400 AM CDT FOR SOUTHEASTERN
MADISON...MCNAIRY...SOUTHERN HENDERSON...HARDIN...EAST CENTRAL
HARDEMAN...SOUTHERN DECATUR AND CHESTER COUNTIES...

THE HEAVY RAINFALL WHICH PROMPTED THE WARNING HAS DIMINISHED ACROSS
THE WARNED AREA. THUS THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO
EXPIRE.

.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 3500 8876 3546 8885 3552 8892 3558 8858
      3559 8803 3547 8802 3544 8804 3543 8801
      3502 8798

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 16, 7:52 PM CDTSpecial Weather StatementMEGWeakley23 min
Aug 16, 8:36 PM CDTSpecial Weather StatementMEGGibson24 min
Aug 16, 9:07 PM CDTSpecial Weather StatementMEGCarroll23 min
Aug 16, 9:20 PM CDTSpecial Weather StatementMEGMadison25 min
Aug 16, 9:39 PM CDTSpecial Weather StatementMEGCarroll36 min
Aug 16, 9:43 PM CDTSpecial Weather StatementMEGHenderson32 min
Aug 16, 9:49 PM CDTSpecial Weather StatementMEGLake26 min
Aug 16, 11:16 PM CDTFlash Flood WarningMEGCarroll, Decatur, Henderson, Madison3 hr
Aug 16, 11:28 PM CDTSpecial Weather StatementMEGHaywood32 min
Aug 16, 11:57 PM CDTSpecial Weather StatementMEGShelby33 min
Aug 17, 12:19 AM CDTSevere Thunderstorm WarningMEGFayette, Shelby26 min
Aug 17, 12:24 AM CDTSpecial Weather StatementMEGFayette36 min
Aug 17, 12:59 AM CDTFlash Flood WarningMEGFayette, Hardeman, Shelby3 hr

Nearby

Flash Flood Warnings in Tennessee, 2012Every flash flood 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.