Alert archive / Arkansas / Flash Flood Warnings in 2011

Flash Flood Warning 8, NWS Tulsa, OK

April 24, 20114 counties in Arkansas

NWS Tulsa, OK issued this flash flood warning at Apr 24, 2011, 2:05 PM CDT for 4 counties in Arkansas. It was in force for 6 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 24, 2011, 2:05 PM CDT (19:05 UTC)
Expired: Apr 24, 2011, 8:00 PM 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), 111 km from the middle of the area, began a volume at 19:07 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.

What was reported inside it

Time	Report	Where	Remark
Apr 24, 8:06 PM CDT	FLASH FLOOD	Green Forest, AR	SWIFT WATER RESCUE NEAR THE INTERSECTION OF HIGHWAYS 103 AND 617
Apr 24, 8:07 PM CDT	FLASH FLOOD	Eureka Springs, AR	SWIFT WATER RESCUE IN EUREKA SPRINGS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 7.1 hours before the alert went out and 92 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 495 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 132 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.

809 
WGUS54 KTSA 241905
FFWTSA
ARC007-015-087-143-250100-
/O.NEW.KTSA.FF.W.0008.110424T1905Z-110425T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
205 PM CDT SUN APR 24 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 800 PM CDT

* AT 200 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
THAT THE HEAVY RAINFALL HAS BRIEFLY LESSENED ACROSS THE WARNED AREA. 
HOWEVER...ADDITIONAL MODERATE TO HEAVY PRECIPITATION IS EXPECTED 
DURING THE AFTEROON. AMOUNTS OF 1 TO 2 INCHES OR HIGHER WILL BE 
POSSIBLE... AND NEARLY ALL OF THAT WILL BE RUNNOFF INTO STREAMS AND 
DRAINAGE AREAS. FLOODING IS ONGOING IN THE WARNED AREA. 

* 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...GATEWAY...GENTRY...
  GRANDVIEW...GRAVETTE...GREEN FOREST AND GREENLAND.

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  
UNTIL THE WATER RECEDES. REMEMBER...MOST FLOOD RELATED DEATHS OCCUR 
IN AUTOMOBILES.

LOW WATER CROSSINGS IN HILLY TERRAIN ARE ESPECIALLY DANGEROUS IN 
HEAVY RAIN. 

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN TULSA.

&&

LAT...LON 3612 9330 3612 9346 3609 9346 3608 9343
      3601 9343 3587 9351 3577 9351 3576 9449
      3650 9459 3648 9329

$$

1 follow-up statement

416 
WGUS74 KTSA 242254
FFSTSA

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
554 PM CDT SUN APR 24 2011

ARC007-015-087-143-250100-
/O.CON.KTSA.FF.W.0008.000000T0000Z-110425T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON AR-CARROLL AR-BENTON AR-MADISON AR-
554 PM CDT SUN APR 24 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR MADISON...BENTON...
CARROLL AND WASHINGTON COUNTIES IN NORTHWEST ARKANSAS UNTIL 800 PM
CDT...

AT 552 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE WARNED AREA. 3 TO 5 INCHES
OF RAIN HAS ALREADY OCCURRED OVER THE PAST 2 DAYS...WITH AN 
ADDITIONAL 1 TO 2 INCHES POSSIBLE THROUGH 8 PM.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL 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...GATEWAY...GENTRY...GRANDVIEW...
GRAVETTE...GREEN FOREST AND GREENLAND.

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.

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.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN TULSA.

&&

LAT...LON 3612 9330 3612 9346 3609 9346 3608 9343
      3601 9343 3587 9351 3577 9351 3576 9449
      3650 9459 3648 9329

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 7:10 PM CDT	Special Weather Statement	TSA	Madison	50 min
Apr 23, 7:27 PM CDT	Severe Thunderstorm Warning	TSA	Madison	43 min
Apr 23, 7:56 PM CDT	Tornado Warning	TSA	Madison	19 min
Apr 23, 10:15 PM CDT	Flash Flood Warning	TSA	Benton, Carroll, Madison, Washington	6 hr
Apr 23, 10:39 PM CDT	River Flood Warning	TSA	Carroll	64 hr
Apr 23, 10:51 PM CDT	Special Weather Statement	TSA	Benton, Carroll, Madison, Washington	54 min
Apr 23, 10:57 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	63 min
Apr 23, 11:14 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	16 min
Apr 23, 11:32 PM CDT	Wind Advisory	TSA		4 hr
Apr 23, 11:50 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Madison, Washington	42 min
Apr 24, 12:16 AM CDT	Special Weather Statement	TSA	Washington	44 min
Apr 24, 3:49 AM CDT	Areal Flood Warning	TSA	Benton, Carroll, Madison, Washington	8 hr
Apr 24, 9:51 AM CDT	Flash Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Washington	4 hr
Apr 24, 6:24 PM CDT	Special Weather Statement	TSA	Crawford	36 min
Apr 24, 6:29 PM CDT	Areal Flood Advisory	TSA	Crawford, Sebastian	61 min
Apr 24, 6:48 PM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Sebastian	6 hr
Apr 24, 6:48 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	42 min
Apr 24, 6:52 PM CDT	Severe Thunderstorm Warning	TSA	Sebastian	53 min
Apr 24, 6:54 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin	35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.