Alert archive / Tennessee / Flash Flood Warnings in 2011

Flash Flood Warning 46, NWS Memphis, TN

April 20, 20118 counties in Tennessee

NWS Memphis, TN issued this flash flood warning at Apr 20, 2011, 1:12 AM CDT for 8 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
Apr 20, 2011, 1:12 AM CDT (06:12 UTC)
Expired
Apr 20, 2011, 4:15 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, Fayette County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Madison County, TN, McNairy County, TN

The radar

The Memphis radar (KNQA), 149 km from the middle of the area, began a volume at 06:11 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 6.2 hours before the alert went out and 168 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, Nashville Metro, TN at 00:00Z on 2011-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1997 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, Nashville Metro, TN at 00:00Z on 2011-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 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
1997 J/kg
Mixed-layer CIN
-93 J/kg
Mixed-layer LCL
1626 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
239 m²/s²
Significant tornado parameter
0.4
Supercell composite
7.7

Open this sounding in Storm Lab

The text

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

449 
WGUS54 KMEG 200612
FFWMEG
TNC023-039-047-069-071-077-109-113-200915-
/O.NEW.KMEG.FF.W.0046.110420T0612Z-110420T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
112 AM CDT WED APR 20 2011

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN DECATUR COUNTY IN TENNESSEE...
  CHESTER COUNTY IN SOUTHWEST TENNESSEE...
  FAYETTE COUNTY IN SOUTHWEST TENNESSEE...
  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 415 AM CDT

* AT 112 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 HOUR.

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

 THIS WARNING ALSO INCLUDES AREAS NEAR 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 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...RUSHING
CREEK AT LARGO ROAD...SCENIC LANE AT SELF SLOUGH AND SIMS BOTTOM ROAD
AT WHITES CREEK.

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.

.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 3539 8798 3538 8802 3531 8801 3530 8798
      3503 8798 3502 8964 3531 8944 3556 8863
      3569 8801 3561 8802 3553 8796 3549 8797
      3546 8804 3543 8803 3541 8796

$$
2 follow-up statements
574 
WGUS74 KMEG 200804
FFSMEG

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
304 AM CDT WED APR 20 2011

TNC023-039-047-069-071-077-109-113-200915-
/O.CON.KMEG.FF.W.0046.000000T0000Z-110420T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DECATUR TN-FAYETTE TN-HENDERSON TN-MADISON TN-CHESTER TN-HARDEMAN TN-
HARDIN TN-MCNAIRY TN-
304 AM CDT WED APR 20 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM CDT FOR
MCNAIRY...HARDIN...HARDEMAN...CHESTER...SOUTHEASTERN MADISON...
SOUTHERN HENDERSON...FAYETTE AND SOUTHERN DECATUR COUNTIES...

AT 304 AM CDT...DOPPLER RADAR ESTIMATES 2 TO 3 INCHES OF RAINFALL HAS
OCCURRED OVER THE PAST 3 HOURS. SHOWERS AND THUNDERSTORMS WILL
PRODUCE AN ADDITIONAL 1 TO 2 INCHES OF RAIN OVER THE NEXT HOUR.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOLIVAR...
HENDERSON...SAVANNAH...SELMER...BIG HILL POND STATE PARK...CHICKASAW
STATE PARK...CHICKASAW STATE FOREST...PICKWICK LANDING STATE PARK AND
T O FULLER STATE PARK.

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 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...RUSHING
CREEK AT LARGO ROAD...SCENIC LANE AT SELF SLOUGH AND SIMS BOTTOM ROAD
AT WHITES CREEK.

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.

.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 3539 8798 3538 8802 3531 8801 3530 8798
      3503 8798 3502 8964 3531 8944 3556 8863
      3569 8801 3561 8802 3553 8796 3549 8797
      3546 8804 3543 8803 3541 8796

$$
214 
WGUS74 KMEG 200905
FFSMEG

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
405 AM CDT WED APR 20 2011

TNC023-039-047-069-071-077-109-113-200915-
/O.EXP.KMEG.FF.W.0046.000000T0000Z-110420T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DECATUR TN-FAYETTE TN-HENDERSON TN-MADISON TN-CHESTER TN-HARDEMAN TN-
HARDIN TN-MCNAIRY TN-
405 AM CDT WED APR 20 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 415 AM CDT FOR MCNAIRY...
HARDIN...HARDEMAN...CHESTER...SOUTHEASTERN MADISON...SOUTHERN
HENDERSON...FAYETTE AND SOUTHERN DECATUR 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 3539 8798 3538 8802 3531 8801 3530 8798
      3503 8798 3502 8964 3531 8944 3556 8863
      3569 8801 3561 8802 3553 8796 3549 8797
      3546 8804 3543 8803 3541 8796

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 9:13 PM CDTSevere Thunderstorm WarningMEGDyer, Lake47 min
Apr 19, 9:52 PM CDTSevere Thunderstorm WarningMEGDyer, Lake53 min
Apr 19, 10:21 PM CDTFlash Flood WarningMEGLake3 hr
Apr 19, 10:22 PM CDTSevere Thunderstorm WarningMEGShelby38 min
Apr 19, 10:24 PM CDTSevere Thunderstorm WarningMEGDyer, Lake, Obion, Weakley66 min
Apr 19, 10:27 PM CDTSevere Thunderstorm WarningMEGDyer, Haywood, Lauderdale, Obion, Tipton63 min
Apr 19, 10:42 PM CDTTornado WarningMEGLauderdale, Tipton34 min
Apr 19, 10:52 PM CDTTornado WarningMEGDyer, Lake, Obion23 min
Apr 19, 10:54 PM CDTTornado WarningMEGDyer, Haywood, Lauderdale31 min
Apr 19, 10:55 PM CDTTornado WarningMEGFayette, Shelby29 min
Apr 19, 10:59 PM CDTSevere Thunderstorm WarningMEGFayette, Shelby, Tipton46 min
Apr 19, 11:00 PM CDTSevere Thunderstorm WarningMEGCrockett, Dyer, Gibson, Haywood, Lauderdale, Madison and 3 more60 min
Apr 19, 11:06 PM CDTTornado WarningMEGFayette, Hardeman, Haywood, Lauderdale, Madison, Shelby and 1 more39 min
Apr 19, 11:21 PM CDTSevere Thunderstorm WarningMEGDyer, Gibson, Henry, Lake, Obion, Weakley39 min
Apr 19, 11:22 PM CDTSevere Thunderstorm WarningMEGChester, Fayette, Hardeman, Haywood, McNairy, Madison38 min
Apr 19, 11:33 PM CDTTornado WarningMEGChester, Fayette, Hardeman, McNairy27 min
Apr 19, 11:35 PM CDTSevere Thunderstorm WarningMEGCarroll, Chester, Decatur, Gibson, Henderson, Henry and 2 more55 min
Apr 19, 11:45 PM CDTSevere Thunderstorm WarningMEGChester, Fayette, Hardeman, Hardin, McNairy45 min
Apr 19, 11:53 PM CDTTornado WarningMEGHenry, Weakley37 min
Apr 20, 12:17 AM CDTSevere Thunderstorm WarningMEGShelby, Tipton43 min
Apr 20, 12:26 AM CDTSevere Thunderstorm WarningMEGChester, Decatur, Hardeman, Hardin, Henderson, McNairy64 min
Apr 20, 12:29 AM CDTSevere Thunderstorm WarningMEGTipton46 min
Apr 20, 12:32 AM CDTSevere Thunderstorm WarningMEGChester, Fayette, Hardeman, McNairy43 min
Apr 20, 12:52 AM CDTSevere Thunderstorm WarningMEGTipton38 min
Apr 20, 1:07 AM CDTFlash Flood WarningMEGLauderdale, Tipton3 hr
Apr 20, 1:23 AM CDTSevere Thunderstorm WarningMEGTipton36 min
Apr 20, 1:26 AM CDTSevere Thunderstorm WarningMEGChester, Decatur, Hardin, Henderson, McNairy49 min
Apr 20, 1:45 AM CDTSevere Thunderstorm WarningMEGCrockett, Fayette, Haywood, Lauderdale, Shelby, Tipton45 min
Apr 20, 2:22 AM CDTSevere Thunderstorm WarningMEGFayette, Hardeman, Haywood, Shelby, Tipton38 min
Apr 20, 2:45 AM CDTSevere Thunderstorm WarningMEGChester, Hardeman, Haywood, Henderson, McNairy, Madison45 min
Apr 20, 3:05 AM CDTSevere Thunderstorm WarningMEGChester, Decatur, Hardin, Henderson, McNairy55 min
Apr 20, 3:18 AM CDTFlash Flood WatchMEGFayette, Hardeman, Hardin, McNairy, Shelby30 hr
Apr 20, 3:34 PM CDTSpecial Weather StatementMEGTipton26 min
Apr 20, 4:54 PM CDTSevere Thunderstorm WarningMEGHardin, McNairy36 min
Apr 20, 5:48 PM CDTSevere Thunderstorm WarningMEGHardeman, McNairy42 min

Nearby

Flash Flood Warnings in Tennessee, 2011Every flash flood warning in 2011

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.