Alert archive / Arkansas / Flash Flood Warnings in 2011

Flash Flood Warning 5, NWS Tulsa, OK

April 23, 20114 counties in Arkansas

NWS Tulsa, OK issued this flash flood warning at Apr 23, 2011, 10:15 PM CDT for 4 counties in Arkansas. It was in force for 6 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
Apr 23, 2011, 10:15 PM CDT (03:15 UTC)
Expired
Apr 24, 2011, 4:00 AM CDT
In force
6 hr
Issued by
NWS Tulsa, OK
Area
Storm-based polygon
Flood severity
None

Counties Benton County, AR, Carroll County, AR, Madison County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 107 km from the middle of the area, began a volume at 03:16 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

Springfield, MO (KSGF), launched 00:00Z, 3.3 hours before the alert went out and 98 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, Springfield, MO at 00:00Z on 2011-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Springfield, MO at 00:00Z on 2011-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
747 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
283 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.0

Open this sounding in Storm Lab

The text

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

954 
WGUS54 KTSA 240315
FFWTSA
ARC007-015-087-143-240900-
/O.NEW.KTSA.FF.W.0005.110424T0315Z-110424T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
1015 PM CDT SAT APR 23 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BENTON COUNTY IN NORTHWEST ARKANSAS...
  CARROLL COUNTY IN NORTHWEST ARKANSAS...
  MADISON COUNTY IN NORTHWEST ARKANSAS...
  WASHINGTON COUNTY IN NORTHWEST ARKANSAS...

* UNTIL 400 AM CDT

* AT 1014 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
SCATTERED THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE WARNED AREA. 
3 TO 5 INCHES RAINFALL HAS ALREADY OCCURRED WITH AN ADDITIONAL 2 TO 
3 INCHES POSSIBLE THROUGH 4 AM. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT COULD EXPERIENCE FLOODING INCLUDE...
  BENTONVILLE...BERRYVILLE...EUREKA SPRINGS...FAYETTEVILLE...
  HUNTSVILLE...ROGERS...SILOAM SPRINGS...SPRINGDALE...ALPENA...
  AURORA...BEAVER...BELLA VISTA...BLACKBURN...BOSTON...BRENTWOOD...
  CARROLLTON...CAVE SPRINGS...CINCINNATI...CLIFTY...DECATUR...
  ELKINS...FARMINGTON...FORUM...GARFIELD...GENTRY...GRANDVIEW...
  GRAVETTE...GREEN FOREST...GREENLAND AND HIGHFILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD TO
UNKNOWN DEPTHS. IT ONLY TAKES TWO FEET OF RUSHING WATER TO CARRY AWAY
MOST SPORT UTILITY VEHICLES AND PICKUPS. TAKE A DIFFERENT ROUTE TO
REACH YOUR DESTINATION OR WAIT UNTIL THE WATER RECEDES. REMEMBER...
MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3612 9330 3612 9346 3609 9346 3608 9343
      3601 9343 3597 9344 3595 9348 3587 9351
      3576 9352 3578 9390 3576 9391 3577 9448
      3648 9461 3649 9329 3613 9329

$$
1 follow-up statement
975 
WGUS74 KTSA 240520
FFSTSA

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1220 AM CDT SUN APR 24 2011

ARC007-015-087-143-240900-
/O.CON.KTSA.FF.W.0005.000000T0000Z-110424T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON AR-CARROLL AR-BENTON AR-MADISON AR-
1220 AM CDT SUN APR 24 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR MADISON...BENTON...
CARROLL AND WASHINGTON COUNTIES IN NORTHWEST ARKANSAS UNTIL 400 AM
CDT...

AT 1215 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE WARNED AREA. 3 TO 5 
INCHES OF RAINFALL HAS ALREADY OCCURRED WITH AN ADDITIONAL 1 TO 3 
POSSIBLE. LIFE THREATENING FLOODING HAS BEEN REPORTED IN PARTS OF 
CARROLL COUNTY...ESPECIALLY NEAR EUREKA SPRINGS...BERRYVILLE...AND 
OAK GROVE. REPORTS INDICATE THAT SEVERAL COUNTY ROADS IN 
NORTHEASTERN CARROLL COUNTY HAVE WASHED OUT...AND THAT WATER IS 
ENTERING BUSINESSES AND HOMES IN SOME AREAS.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CONTINUE TO CAUSE FLASH 
FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH 
FLOODING INCLUDE...BENTONVILLE...BERRYVILLE...EUREKA SPRINGS... 
FAYETTEVILLE...HUNTSVILLE...ROGERS...SILOAM SPRINGS...SPRINGDALE... 
ALPENA...AURORA...BEAVER...BELLA VISTA...BLACKBURN...BOSTON... 
BRENTWOOD...CARROLLTON...CAVE SPRINGS...CINCINNATI...CLIFTY... 
DECATUR... ELKINS...FARMINGTON...FORUM ...GARFIELD...GENTRY... 
GRANDVIEW...GRAVETTE...GREEN FOREST...GREENLAND AND HIGHFILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

LOW WATER CROSSINGS IN HILLY TERRAIN ARE ESPECIALLY DANGEROUS IN
HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND
ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER
TO CARRY VEHICLES AWAY.

&&

LAT...LON 3612 9330 3612 9346 3609 9346 3608 9343
      3601 9343 3597 9344 3595 9348 3587 9351
      3576 9352 3578 9390 3576 9391 3577 9448
      3648 9461 3649 9329 3613 9329

$$

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 23, 7:10 PM CDTSpecial Weather StatementTSAMadison50 min
Apr 23, 7:27 PM CDTSevere Thunderstorm WarningTSAMadison43 min
Apr 23, 7:56 PM CDTTornado WarningTSAMadison19 min
Apr 23, 10:39 PM CDTRiver Flood WarningTSACarroll64 hr
Apr 23, 10:51 PM CDTSpecial Weather StatementTSABenton, Carroll, Madison, Washington54 min
Apr 23, 10:57 PM CDTSevere Thunderstorm WarningTSABenton, Washington63 min
Apr 23, 11:14 PM CDTSevere Thunderstorm WarningTSACarroll16 min
Apr 23, 11:32 PM CDTWind AdvisoryTSA4 hr
Apr 23, 11:50 PM CDTSevere Thunderstorm WarningTSACrawford, Franklin, Madison, Washington42 min
Apr 24, 12:16 AM CDTSpecial Weather StatementTSAWashington44 min
Apr 24, 3:49 AM CDTAreal Flood WarningTSABenton, Carroll, Madison, Washington8 hr
Apr 24, 9:51 AM CDTFlash Flood WarningTSABenton, Carroll, Crawford, Franklin, Madison, Washington4 hr
Apr 24, 2:05 PM CDTFlash Flood WarningTSABenton, Carroll, Madison, Washington6 hr
Apr 24, 6:24 PM CDTSpecial Weather StatementTSACrawford36 min
Apr 24, 6:29 PM CDTAreal Flood AdvisoryTSACrawford, Sebastian61 min
Apr 24, 6:48 PM CDTFlash Flood WarningTSACrawford, Franklin, Sebastian6 hr
Apr 24, 6:48 PM CDTSevere Thunderstorm WarningTSACrawford, Sebastian42 min
Apr 24, 6:52 PM CDTSevere Thunderstorm WarningTSASebastian53 min
Apr 24, 6:54 PM CDTSevere Thunderstorm WarningTSACrawford, Franklin35 min

Nearby

Flash Flood Warnings in Arkansas, 2011Every 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.