Alert archive / Arkansas / Flash Flood Warnings in 2012

Flash Flood Warning 20, NWS Memphis, TN

May 7, 20124 counties in Arkansas; Dunklin County, Missouri

NWS Memphis, TN issued this flash flood warning at May 7, 2012, 4:57 AM CDT for 4 counties in Arkansas; Dunklin County, Missouri. 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
May 7, 2012, 4:57 AM CDT (09:57 UTC)
Expired
May 7, 2012, 8:00 AM CDT
In force
3 hr
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Flood severity
None

Counties Clay County, AR, Craighead County, AR, Greene County, AR, Randolph County, AR, Dunklin County, MO

The radar

The Memphis radar (KNQA), 104 km from the middle of the area, began a volume at 09:58 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 00:00Z, 10.0 hours before the alert went out and 156 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 00:00Z on 2012-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1694 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 00:00Z on 2012-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.1939Sfc1 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
1694 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
1441 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

544 
WGUS54 KMEG 070957
FFWMEG
ARC021-031-055-121-MOC069-071300-
/O.NEW.KMEG.FF.W.0020.120507T0957Z-120507T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
457 AM CDT MON MAY 7 2012

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLAY COUNTY IN EASTERN ARKANSAS...
  EXTREME NORTHEASTERN CRAIGHEAD COUNTY IN EASTERN ARKANSAS...
  EASTERN GREENE COUNTY IN EASTERN ARKANSAS...
  NORTHEASTERN RANDOLPH COUNTY IN EASTERN ARKANSAS...
  SOUTHWESTERN DUNKLIN COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 800 AM CDT

* AT 456 AM CDT...DOPPLER RADAR ESTIMATES 3 TO 5 INCHES OF RAINFALL  
  HAS OCCURRED OVER THE PAST 6 HOURS. ADDITIONAL SHOWERS AND         
  THUNDERSTORMS WILL MOVE INTO THE AREA FROM CENTRAL ARKANSAS AND    
  WILL PRODUCE AN ADDITIONAL 1 TO 3 INCHES OF RAIN OVER THE NEXT 3   
  HOURS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CORNING...
  MARMADUKE...RECTOR...SENATH...BUCODA...BUCK DONIC...HOLLYWOOD AND
  PAULDING.

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.

.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 3613 9011 3600 9022 3600 9029 3594 9029
      3630 9078 3649 9086 3650 9031

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 7:30 PM CDTSpecial Weather StatementMEGClay30 min
May 6, 7:33 PM CDTSpecial Weather StatementMEGGreene27 min
May 6, 7:44 PM CDTSpecial Weather StatementMEGMississippi31 min
May 6, 7:58 PM CDTSevere Thunderstorm WarningMEGMississippi47 min
May 6, 8:24 PM CDTSpecial Weather StatementMEGClay36 min
May 6, 8:44 PM CDTSpecial Weather StatementMEGMississippi31 min
May 6, 9:21 PM CDTSpecial Weather StatementMEGMississippi39 min
May 6, 9:49 PM CDTFlash Flood WarningMEGMississippi3 hr
May 7, 1:07 AM CDTSpecial Weather StatementMEGMississippi23 min
May 7, 1:11 AM CDTSpecial Weather StatementMEGClay34 min
May 7, 1:38 AM CDTSpecial Weather StatementMEGCross52 min
May 7, 1:41 AM CDTFlash Flood WarningMEGClay, Randolph3 hr
May 7, 2:40 AM CDTFlash Flood WarningMEGMississippi3 hr
May 7, 5:39 AM CDTFlash Flood WarningMEGMississippi3 hr
May 7, 8:05 AM CDTFlash Flood WarningMEGClay, Craighead, Greene, Randolph115 min

Nearby

Flash Flood Warnings in Arkansas, 2012Flash Flood Warnings in Missouri, 2012Every flash flood warning in 2012

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.