Alert archive / Tennessee / Flash Flood Warnings in 2011

Flash Flood Warning 41, NWS Memphis, TN

April 11, 2011Dyer County, Lauderdale County, Obion County, Tennessee

NWS Memphis, TN issued this flash flood warning at Apr 11, 2011, 2:17 PM CDT for Dyer County, Lauderdale County, Obion County, Tennessee. It was in force for 117 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: Apr 11, 2011, 2:17 PM CDT (19:17 UTC)
Expired: Apr 11, 2011, 4:14 PM CDT
In force: 117 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Dyer County, TN, Lauderdale County, TN, Obion County, TN

The radar

The Memphis radar (KNQA), 94 km from the middle of the area, began a volume at 19:20 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

Little Rock, AR (KLZK), launched 12:00Z, 7.3 hours before the alert went out and 150 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: 936 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 647 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 296 m²/s²
0-3 km storm-relative helicity: 322 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 6.5

Open this sounding in Storm Lab

The text

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

039 
WGUS54 KMEG 111917
FFWMEG
TNC045-097-131-112215-
/O.NEW.KMEG.FF.W.0041.110411T1917Z-110411T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
217 PM CDT MON APR 11 2011

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DYER COUNTY IN NORTHWEST TENNESSEE...
  SOUTH CENTRAL OBION COUNTY IN NORTHWEST TENNESSEE...
  NORTHEASTERN LAUDERDALE COUNTY IN SOUTHWEST TENNESSEE...

* UNTIL 515 PM CDT

* AT 215 PM CDT... 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. LOCAL EMERGENCY
  MANAGEMENT OFFICIALS REPORTED FLASH FLOODING WITH SEVERAL STREETS 
  AND COUNTY ROADS FLOODED IN THE CITY OF DYERSBURG.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DYERSBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

.EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

.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 3634 8916 3617 8915 3583 8950 3593 8966
      3597 8970

$$


TLSJR

1 follow-up statement

283 
WGUS74 KMEG 112114
FFSMEG

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
414 PM CDT MON APR 11 2011

TNC045-097-131-112124-
/O.CAN.KMEG.FF.W.0041.000000T0000Z-110411T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LAUDERDALE TN-OBION TN-DYER TN-
414 PM CDT MON APR 11 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR DYER...SOUTH
CENTRAL OBION AND NORTHEASTERN LAUDERDALE 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 3634 8916 3617 8915 3583 8950 3593 8966
      3597 8970

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 4:43 AM CDT	Wind Advisory	MEG	Carroll, Chester, Crockett, Decatur, Dyer, Fayette and 14 more	12 hr
Apr 11, 7:42 AM CDT	Severe Thunderstorm Warning	MEG	Dyer, Lauderdale, Tipton	48 min
Apr 11, 8:29 AM CDT	Severe Thunderstorm Warning	MEG	Crockett, Dyer, Gibson, Haywood, Lake, Lauderdale and 2 more	36 min
Apr 11, 12:27 PM CDT	River Flood Advisory	MEG	Dyer, Lake	3 days
Apr 11, 12:34 PM CDT	Flash Flood Warning	MEG	Lauderdale, Tipton	3 hr
Apr 11, 1:54 PM CDT	Flash Flood Warning	MEG	Shelby	80 min
Apr 11, 2:43 PM CDT	Special Weather Statement	MEG	Crockett, Gibson, Madison	32 min
Apr 11, 3:45 PM CDT	Flash Flood Warning	MEG	Decatur	2 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.