Alert archive / Tennessee / Flash Flood Warnings in 2011

Flash Flood Warning 29, NWS Memphis, TN

February 28, 2011Carroll County, Gibson County, Tennessee

NWS Memphis, TN issued this flash flood warning at Feb 28, 2011, 8:31 AM CST for Carroll County, Gibson County, Tennessee. It was in force for 117 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 28, 2011, 8:31 AM CST (14:31 UTC)
Expired: Feb 28, 2011, 10:28 AM CST
In force: 117 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Carroll County, TN, Gibson County, TN

The radar

The Paducah radar (KPAH), 126 km from the middle of the area, began a volume at 14:35 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 was reported inside it

Time	Report	Where	Remark
Feb 28, 9:00 AM CST	FLASH FLOOD	Bruceton, TN	ROAD WAS CLOSED DUE TO FLOOD WATER IN BRUCETON.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 2.5 hours before the alert went out and 175 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: 948 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 795 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 369 m²/s²
0-3 km storm-relative helicity: 404 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

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

892 
WGUS54 KMEG 281431
FFWMEG
TNC017-053-281730-
/O.NEW.KMEG.FF.W.0029.110228T1431Z-110228T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
831 AM CST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CARROLL COUNTY IN NORTHWEST TENNESSEE...
  SOUTHEASTERN GIBSON COUNTY IN NORTHWEST TENNESSEE...

* UNTIL 1130 AM CST

* AT 830 AM CST... 2 TO 4 INCHES OF RAINFALL HAS OCCURRED IN THE PAST
  3 HOURS. FLOOD WATERS HAVE REACHED DOORS IN MEDINA...WITH FLOODING 
  ALSO REPORTED IN HUNTINGDON. MOST OF THE HEAVY RAIN HAS            
  ENDED...BUT FLOOD WATERS WILL TAKE A WHILE TO RECEDE.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ATWOOD...
  BRUCETON...HUMBOLDT...HUNTINGDON...MILAN AND VALE.

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.

.IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 3592 8821 3580 8870 3580 8891 3583 8895
      3587 8907 3615 8835 3615 8821 3613 8820

$$
BORGHOFF

2 follow-up statements

778 
WGUS74 KMEG 281613
FFSMEG

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
1013 AM CST MON FEB 28 2011

TNC017-053-281730-
/O.CON.KMEG.FF.W.0029.000000T0000Z-110228T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARROLL TN-GIBSON TN-
1013 AM CST MON FEB 28 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 AM CST FOR
SOUTHEASTERN GIBSON AND CARROLL COUNTIES...

AT 1013 AM CST...DOPPLER RADAR ESTIMATES 2 TO 4 INCHES OF RAINFALL 
HAS OCCURRED THIS MORNING. CALLS TO LOCAL LAW ENFORCEMENT HAVE 
INDICATED MOST OF THE FLOOD WATERS HAVE RECEDED...AND THE FLASH 
FLOOD WARNING WILL LIKELY BE CANCELLED BY 1030 AM UNLESS ADDITIONAL 
RAINFALL DEVELOPS.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HUMBOLDT...
HUNTINGDON AND MILAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

.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.

&&

LAT...LON 3592 8821 3580 8870 3580 8891 3583 8895
      3587 8907 3615 8835 3615 8821 3613 8820

$$

BORGHOFF

943 
WGUS74 KMEG 281628
FFSMEG

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
1028 AM CST MON FEB 28 2011

TNC017-053-281639-
/O.CAN.KMEG.FF.W.0029.000000T0000Z-110228T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARROLL TN-GIBSON TN-
1028 AM CST MON FEB 28 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN GIBSON
AND CARROLL COUNTIES...

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

.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 3592 8821 3580 8870 3580 8891 3583 8895
      3587 8907 3615 8835 3615 8821 3613 8820

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 10:47 PM CST	Wind Advisory	MEG	Dyer, Lake, Lauderdale, Obion, Shelby, Tipton	7 hr
Feb 28, 5:29 AM CST	Flash Flood Warning	MEG	Carroll, Gibson	3 hr
Feb 28, 6:35 AM CST	Tornado Warning	MEG	Decatur, Henderson	25 min
Feb 28, 6:53 AM CST	Special Weather Statement	MEG	Shelby	37 min
Feb 28, 7:08 AM CST	Special Weather Statement	MEG	Shelby, Tipton	22 min
Feb 28, 12:06 PM CST	Wind Advisory	MEG	Carroll, Chester, Crockett, Decatur, Dyer, Fayette and 14 more	4 hr

Nearby

Flash Flood Warnings in Tennessee, 2011 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.