Alert archive / Tennessee / Flash Flood Warnings in 2015

Flash Flood Warning 2, NWS Memphis, TN

February 21, 2015Dyer County, Lake County, Obion County, Tennessee; Dunklin County, Pemiscot County, Missouri; Mississippi County, Arkansas

NWS Memphis, TN issued this flash flood warning at Feb 21, 2015, 9:27 AM CST for Dyer County, Lake County, Obion County, Tennessee; Dunklin County, Pemiscot County, Missouri; Mississippi County, Arkansas. 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
Feb 21, 2015, 9:27 AM CST (15:27 UTC)
Expired
Feb 21, 2015, 12:30 PM CST
In force
3 hr
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Flood severity
None

Counties Mississippi County, AR, Dunklin County, MO, Pemiscot County, MO, Dyer County, TN, Lake County, TN, Obion County, TN

The radar

The Paducah radar (KPAH), 96 km from the middle of the area, began a volume at 15:27 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 (KBYH), launched 12:00Z, 3.5 hours before the alert went out and 178 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 12:00Z on 2015-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 75 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 12:00Z on 2015-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 485 square meters per square second.1939587897117Sfc1 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
75 J/kg
Mixed-layer CIN
-118 J/kg
Mixed-layer LCL
448 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
485 m²/s²
0-3 km storm-relative helicity
566 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.4

Open this sounding in Storm Lab

The text

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

382 
WGUS54 KMEG 211527
FFWMEG
ARC093-MOC069-155-TNC045-095-131-211830-
/O.NEW.KMEG.FF.W.0002.150221T1527Z-150221T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
927 AM CST SAT FEB 21 2015

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN MISSISSIPPI COUNTY IN EASTERN ARKANSAS...
  PEMISCOT COUNTY IN SOUTHEASTERN MISSOURI...
  SOUTHEASTERN DUNKLIN COUNTY IN SOUTHEASTERN MISSOURI...
  LAKE COUNTY IN NORTHWESTERN TENNESSEE...
  OBION COUNTY IN NORTHWESTERN TENNESSEE...
  DYER COUNTY IN NORTHWESTERN TENNESSEE...

* UNTIL 1230 PM CST

* AT 926 AM CST...DOPPLER RADAR ESTIMATES 1 TO 3 INCHES OF RAIN HAS
  OCCURRED OVER THE PAST 3 HOURS. SHOWERS AND THUNDERSTORMS WILL 
  PRODUCE AN ADDITIONAL 1 TO 3 INCHES OF RAIN OVER THE NEXT 2 HOURS. 
  MELTING SLEET AND SNOW WILL CREATE ADDITIONAL RUNOFF. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  DYERSBURG...BLYTHEVILLE...KENNETT...UNION CITY...CARUTHERSVILLE...
  GOSNELL...HAYTI...STEELE...LEACHVILLE...SENATH...REELFOOT LAKE
  STATE PARK...TIPTONVILLE...NEWBERN...SOUTH FULTON...RIDGELY...
  TROY...KENTON...OBION...HORNERSVILLE AND HOLCOMB.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

SEND YOUR STORM REPORTS ON TWITTER USING AT NWSMEMPHIS...POST TO OUR
NWS MEMPHIS FACEBOOK PAGE...OR SEND A REPORT ON OUR WEBSITE AT
WEATHER DOT GOV SLANT MEMPHIS AND CLICK ON SUBMIT STORM REPORT.

&&

LAT...LON 3650 8883 3639 8889 3641 8895 3630 8896
      3620 8903 3620 8916 3605 8916 3589 9027
      3647 8998 3639 8997 3639 8975 3643 8973
      3640 8959 3634 8954 3637 8951 3650 8954
      3650 8949 3646 8946 3650 8942 3651 8931

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 21, 8:51 AM CSTRiver Flood WarningMEGCrockett, Dyer, Lauderdale7 days
Feb 21, 9:23 AM CSTRiver Flood WarningMEGDyer64 hr
Feb 21, 9:23 AM CSTRiver Flood WarningMEGMadison44 hr
Feb 21, 9:23 AM CSTRiver Flood WarningMEGFayette, Shelby22 hr
Feb 21, 9:32 AM CSTFlash Flood WarningMEGBenton, Carroll, Gibson, Henry, Weakley3 hr
Feb 21, 9:40 AM CSTFlash Flood WarningMEGObion3 hr
Feb 21, 11:05 AM CSTAreal Flood AdvisoryMEGBenton, Carroll, Chester, Crockett, Decatur, Gibson and 3 more3 hr
Feb 21, 12:31 PM CSTAreal Flood WarningMEGDyer, Gibson, Lake, Obion, Weakley3 hr
Feb 21, 12:47 PM CSTAreal Flood AdvisoryMEGBenton, Carroll, Gibson, Henry, Obion, Weakley3 hr
Feb 21, 1:36 PM CSTAreal Flood AdvisoryMEGChester, Hardeman, Hardin, McNairy3 hr
Feb 21, 2:26 PM CSTAreal Flood AdvisoryMEGChester, Decatur, Henderson, Madison2 hr
Feb 21, 3:30 PM CSTAreal Flood WarningMEGObion8 hr

Nearby

Flash Flood Warnings in Tennessee, 2015Flash Flood Warnings in Missouri, 2015Flash Flood Warnings in Arkansas, 2015Every flash flood warning in 2015

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.