Alert archive / Tennessee / Flash Flood Warnings in 2011

Flash Flood Warning 28, NWS Memphis, TN

February 28, 2011Carroll County, Gibson County, Tennessee

NWS Memphis, TN issued this flash flood warning at Feb 28, 2011, 5:29 AM CST for Carroll County, Gibson County, Tennessee. It was in force for 3 hr. 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, 5:29 AM CST (11:29 UTC)
Expired: Feb 28, 2011, 8:30 AM CST
In force: 3 hr
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 11:29 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, 8:20 AM CST	FLASH FLOOD	Medina, TN	FLOOD WATERS HAVE REACHED DOORS OF HOMES IN MEDINA. NO EVACUATIONS HAVE BEEN NECESSARY.

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 00:00Z, 11.5 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: 184 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1385 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 245 m²/s²
0-3 km storm-relative helicity: 304 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

809 
WGUS54 KMEG 281129
FFWMEG
TNC017-053-281430-
/O.NEW.KMEG.FF.W.0028.110228T1129Z-110228T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
529 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 830 AM CST

* AT 529 AM CST...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 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

1 follow-up statement

136 
WGUS74 KMEG 281208
FFSMEG

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

TNC017-053-281430-
/O.CON.KMEG.FF.W.0028.000000T0000Z-110228T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARROLL TN-GIBSON TN-
608 AM CST MON FEB 28 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 AM CST FOR
SOUTHEASTERN GIBSON AND CARROLL COUNTIES...

AT 608 AM CST...DOPPLER RADAR ESTIMATES 1 TO 3 INCHES OF RAINFALL HAS
OCCURRED OVER THE PAST 2 HOURS. SHOWERS AND THUNDERSTORMS WILL 
PRODUCE AN ADDITIONAL INCH OVER THE NEXT HOUR IN EASTERN CARROLL 
COUNTY.

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

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.

.TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
MEMPHIS.

&&

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, 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, 8:31 AM CST	Flash Flood Warning	MEG	Carroll, Gibson	117 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.