Alert archive / Arkansas / Flash Flood Warnings in 2011

Flash Flood Warning 149, NWS Memphis, TN

August 3, 2011Clay County, Randolph County, Arkansas

NWS Memphis, TN issued this flash flood warning at Aug 3, 2011, 5:13 PM CDT for Clay County, Randolph County, Arkansas. It was in force for 62 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: Aug 3, 2011, 5:13 PM CDT (22:13 UTC)
Expired: Aug 3, 2011, 6:15 PM CDT
In force: 62 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Clay County, AR, Randolph County, AR

The radar

The Memphis radar (KNQA), 147 km from the middle of the area, began a volume at 22:14 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, 10.2 hours before the alert went out and 194 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: 2884 J/kg
Mixed-layer CIN: -161 J/kg
Mixed-layer LCL: 1809 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 128 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.

518 
WGUS54 KMEG 032213
FFWMEG
ARC021-121-032315-
/O.NEW.KMEG.FF.W.0149.110803T2213Z-110803T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
513 PM CDT WED AUG 3 2011

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN CLAY COUNTY IN EASTERN ARKANSAS...
  NORTHEASTERN RANDOLPH COUNTY IN EASTERN ARKANSAS...

* UNTIL 615 PM CDT

* AT 513 PM CDT...DOPPLER RADAR ESTIMATES 2 TO 4 INCHES OF RAINFALL
  HAS OCCURRED OVER THE PAST HOUR. SHOWERS AND THUNDERSTORMS WILL
  PRODUCE AN ADDITIONAL 1 TO 2 INCHES OF RAIN OVER THE NEXT HOUR.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RURAL AREAS
  OF NORTHEASTERN RANDOLPH AND NORTHWESTERN CLAY COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

.DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

.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 3638 9072 3638 9091 3650 9094 3651 9075

$$

1 follow-up statement

568 
WGUS74 KMEG 032306
FFSMEG

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
606 PM CDT WED AUG 3 2011

ARC021-121-032316-
/O.EXP.KMEG.FF.W.0149.000000T0000Z-110803T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLAY AR-RANDOLPH AR-
606 PM CDT WED AUG 3 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM CDT FOR NORTHEASTERN
RANDOLPH AND NORTHWESTERN CLAY COUNTIES...

THE HEAVY RAINFALL WHICH PROMPTED THE WARNING HAS DIMINISHED ACROSS
THE WARNED AREA. THUS THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO
EXPIRE.

.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 3638 9072 3638 9091 3650 9094 3651 9075

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 3:53 PM CDT	Heat Advisory	MEG	Clay, Randolph	24 hr
Aug 3, 4:15 PM CDT	Special Weather Statement	MEG	Randolph	30 min
Aug 3, 4:23 PM CDT	Severe Thunderstorm Warning	MEG	Clay, Randolph	40 min
Aug 3, 5:05 PM CDT	Special Weather Statement	MEG	Randolph	25 min

Nearby

Flash Flood Warnings in Arkansas, 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.