Alert archive / Arkansas / Flash Flood Warnings in 2012

Flash Flood Warning 63, NWS Memphis, TN

December 9, 2012Clay County, Greene County, Arkansas

NWS Memphis, TN issued this flash flood warning at Dec 9, 2012, 5:44 PM CST for Clay County, Greene County, Arkansas. It was in force for 99 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: Dec 9, 2012, 5:44 PM CST (23:44 UTC)
Expired: Dec 9, 2012, 7:23 PM CST
In force: 99 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Clay County, AR, Greene County, AR

The radar

The Memphis radar (KNQA), 114 km from the middle of the area, began a volume at 23:45 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, 11.7 hours before the alert went out and 167 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: 344 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 445 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

381 
WGUS54 KMEG 092344
FFWMEG
ARC021-055-100145-
/O.NEW.KMEG.FF.W.0063.121209T2344Z-121210T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
544 PM CST SUN DEC 9 2012

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL CLAY COUNTY IN EASTERN ARKANSAS...
  GREENE COUNTY IN EASTERN ARKANSAS...

* UNTIL 745 PM CST

* AT 543 PM CST...DOPPLER RADAR ESTIMATES ONE TO TWO INCHES OF       
  RAINFALL HAS OCCURRED OVER THE PAST HOUR. SHOWERS AND              
  THUNDERSTORMS WILL PRODUCE AN ADDITIONAL ONE TO TWO INCHES OVER    
  THE NEXT TWO HOURS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MARMADUKE...PARAGOULD...PIGGOTT...RECTOR...CHALK BLUFF NATURAL
  AREA...CROWLEYS RIDGE STATE PARK AND LAKE FRIERSON STATE PARK.

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 3648 9016 3647 9014 3628 9014 3613 9029
      3597 9039 3597 9084 3650 9042 3650 9015

$$

1 follow-up statement

069 
WGUS74 KMEG 100123
FFSMEG

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
723 PM CST SUN DEC 9 2012

ARC021-055-100133-
/O.CAN.KMEG.FF.W.0063.000000T0000Z-121210T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLAY AR-GREENE AR-
723 PM CST SUN DEC 9 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR GREENE AND CENTRAL
CLAY 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 3648 9016 3647 9014 3628 9014 3613 9029
      3597 9039 3597 9084 3650 9042 3650 9015

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 8, 11:52 PM CST	Special Weather Statement	MEG	Lawrence	38 min
Dec 9, 12:11 AM CST	Special Weather Statement	MEG	Lawrence	34 min
Dec 9, 3:05 PM CST	Severe Thunderstorm Warning	MEG	Lawrence, Randolph	40 min
Dec 9, 3:13 PM CST	Tornado Warning	MEG	Lawrence, Randolph	32 min
Dec 9, 3:40 PM CST	Severe Thunderstorm Warning	MEG	Greene, Randolph	35 min
Dec 9, 4:05 PM CST	Special Weather Statement	MEG	Clay	25 min
Dec 9, 4:48 PM CST	Special Weather Statement	MEG	Craighead	27 min
Dec 9, 4:52 PM CST	Special Weather Statement	MEG	Clay	38 min
Dec 9, 5:13 PM CST	Special Weather Statement	MEG	Craighead	32 min
Dec 9, 5:51 PM CST	Special Weather Statement	MEG	Craighead	39 min

Nearby

Flash Flood Warnings in Arkansas, 2012 Every 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.