Alert archive / Arkansas / Flash Flood Warnings in 2011

Flash Flood Warning 11, NWS Tulsa, OK

April 24, 20114 counties in Arkansas

NWS Tulsa, OK issued this flash flood warning at Apr 24, 2011, 7:55 PM CDT for 4 counties in Arkansas. It was in force for 6 hr. 5 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, 7:55 PM CDT (00:55 UTC)
Expired: Apr 25, 2011, 2:00 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), 104 km from the middle of the area, began a volume at 00:57 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
Apr 24, 9:43 PM CDT	FLASH FLOOD	Tontitown, AR	A PORTIONS OF ROBINSON ROAD CLOSED.
Apr 25, 12:10 AM CDT	FLASH FLOOD	1 S Osage, AR	25 FEET OF WATER REPORTED OVER A BRIDGE ON ROAD 982. CARROLL COUNTY SHERIFFS OFFICE CANNOT GET CLOSE TO THE AREA.
Apr 25, 1:00 AM CDT	FLASH FLOOD	Fayetteville, AR	SWIFT WATER RESCUE ONGOING AT STONEBRIDGE ROAD IN SOUTHEAST FAYETTEVILLE.

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 00:00Z, 0.9 hours before the alert went out and 97 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: 52 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 709 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -8.7

Open this sounding in Storm Lab

The text

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

528 
WGUS54 KTSA 250055
FFWTSA
ARC007-015-087-143-250700-
/O.NEW.KTSA.FF.W.0011.110425T0055Z-110425T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
755 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 200 AM CDT MONDAY

* AT 749 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE WARNED AREA. WIDESPREAD
  RAINFALL AMOUNTS BETWEEN 2 TO 4 INCHES HAVE ALREADY OCCURRED TODAY
  WITH LOCAL AMOUNTS APPROACHING 8 INCHES OVER THE PAST 3 DAYS.
  THUNDERSTORMS WILL CONTINUE TO TRAIN INTO THE WARNED AREA TONIGHT
  WITH AN ADDITIONAL 2 TO 3 INCHES OF RAINFALL LIKELY. SEVERAL COUNTY
  ROADS ACROSS CARROLL COUNTY HAVE BEEN WASHED OUT FROM PREVIOUS
  RAINFALL.

* 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 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.

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 3587 9351 3577 9351 3578 9390
      3577 9391 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 24, 7:22 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	38 min
Apr 24, 7:43 PM CDT	Severe Thunderstorm Warning	TSA	Sebastian	27 min
Apr 24, 7:54 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin	36 min
Apr 24, 9:06 PM CDT	River Flood Warning	TSA	Crawford, Sebastian	4 days
Apr 24, 9:18 PM CDT	River Flood Warning	TSA	Crawford	13 hr
Apr 24, 9:38 PM CDT	Severe Thunderstorm Warning	TSA	Sebastian	35 min
Apr 25, 12:54 AM CDT	Areal Flood Warning	TSA	Crawford, Franklin, Sebastian	6 hr
Apr 25, 1:55 AM CDT	Areal Flood Warning	TSA	Madison, Washington	6 hr
Apr 25, 1:57 AM CDT	Flash Flood Warning	TSA	Benton, Carroll	6 hr
Apr 25, 6:35 AM CDT	Severe Thunderstorm Warning	TSA	Sebastian	25 min
Apr 25, 8:04 AM CDT	Areal Flood Warning	TSA	Benton, Carroll, Madison, Washington	8 hr
Apr 25, 10:38 AM CDT	Special Weather Statement	TSA	Crawford	37 min
Apr 25, 10:43 AM CDT	Severe Thunderstorm Warning	TSA	Crawford, Washington	27 min
Apr 25, 10:49 AM CDT	Flash Flood Warning	TSA	Benton, Carroll, Madison, Washington	3 hr
Apr 25, 11:02 AM CDT	Special Weather Statement	TSA	Sebastian	28 min
Apr 25, 11:26 AM CDT	Special Weather Statement	TSA	Sebastian	34 min
Apr 25, 11:50 AM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Sebastian	6 hr
Apr 25, 11:53 AM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	52 min
Apr 25, 12:21 PM CDT	River Flood Warning	TSA	Crawford	33 hr
Apr 25, 12:41 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin	40 min
Apr 25, 1:05 PM CDT	Flash Flood Warning	TSA	Benton, Carroll, Madison, Washington	6 hr
Apr 25, 1:20 PM CDT	Special Weather Statement	TSA	Carroll, Madison	55 min
Apr 25, 1:50 PM CDT	Special Weather Statement	TSA	Washington	40 min
Apr 25, 2:08 PM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	39 min
Apr 25, 2:50 PM CDT	Special Weather Statement	TSA	Crawford, Washington	25 min
Apr 25, 2:58 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Madison, Washington	47 min
Apr 25, 3:21 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Madison, Washington	24 min
Apr 25, 3:37 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Franklin, Madison	38 min
Apr 25, 4:12 PM CDT	Special Weather Statement	TSA	Crawford, Sebastian	33 min
Apr 25, 5:56 PM CDT	Areal Flood Warning	TSA	Crawford, Franklin, Sebastian	18 hr
Apr 25, 6:57 PM CDT	Areal Flood Warning	TSA	Benton, Carroll, Madison, Washington	17 hr

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.