Alert archive / Arkansas / Flash Flood Warnings in 2011

Flash Flood Warning 23, NWS Tulsa, OK

April 26, 20114 counties in Arkansas

NWS Tulsa, OK issued this flash flood warning at Apr 26, 2011, 5:42 PM CDT for 4 counties in Arkansas. It was in force for 4 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 26, 2011, 5:42 PM CDT (22:42 UTC)
Expired: Apr 26, 2011, 9:30 PM CDT
In force: 4 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), 108 km from the middle of the area, began a volume at 22:43 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 12:00Z, 10.7 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: 8 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 466 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 94 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.

115 
WGUS54 KTSA 262242
FFWTSA
ARC007-015-087-143-270230-
/O.NEW.KTSA.FF.W.0023.110426T2242Z-110427T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
542 PM CDT TUE APR 26 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

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

* UNTIL 930 PM CDT

* AT 540 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE WARNED AREA. OVER A FOOT 
OF RAINFALL HAS ALREADY OCCURRED DURING THE LAST SEVERAL DAYS... AND 
ANY ADDITIONAL RAINFALL WILL WORSEN THE ONGOING FLOODING SITUATION. 
CATASTROPHIC FLOODING IS ALREADY ONGOING. SEVERAL ROADS REMAIN 
FLOODED ACROSS 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...HUNTSVILLE...SILOAM
  SPRINGS...ALPENA...AURORA...BEAVER...BELLA VISTA...BOSTON...
  CARROLLTON...CLIFTY...DECATUR...FORUM...GARFIELD...GATEWAY...
  GENTRY...GRANDVIEW...GRAVETTE...GREEN FOREST...HIGHFILL...
  HINDSVILLE...HIWASSE...JAPTON...KINGSTON...MARBLE...OAK GROVE...
  OSAGE...PEA RIDGE AND PETTIGREW.

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.

&&

LAT...LON 3612 9346 3609 9346 3608 9343 3601 9343
      3597 9344 3595 9348 3587 9351 3577 9351
      3576 9352 3577 9397 3612 9396 3643 9386
      3618 9454 3650 9455 3650 9330 3612 9328

$$

1 follow-up statement

796 
WGUS74 KTSA 270224
FFSTSA

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
924 PM CDT TUE APR 26 2011

ARC007-015-087-143-270239-
/O.EXP.KTSA.FF.W.0023.000000T0000Z-110427T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON AR-CARROLL AR-BENTON AR-MADISON AR-
924 PM CDT TUE APR 26 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR MADISON...BENTON...
CARROLL AND EASTERN WASHINGTON COUNTIES IN NORTHWEST ARKANSAS WILL BE
ALLOWED TO EXPIRE AT 930 PM CDT...

THE HEAVY RAIN HAS ENDED AT THIS TIME...AND THEREFORE...THE FLASH 
FLOOD WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER...DUE TO THE 
ONGOING OVERLAND FLOODING...AN AREAL FLOOD WARNING REMAINS IN EFFECT 
FOR THE WARNED AREA UNTIL MIDNIGHT. ADDITIONAL FLASH FLOOD WARNINGS 
MAY BECOME NECESSARY IF ANY ADDITIONAL THUNDERSTORMS DEVELOP 
OVERNIGHT.

LAT...LON 3612 9346 3609 9346 3608 9343 3601 9343
      3597 9344 3595 9348 3587 9351 3577 9351
      3576 9352 3577 9397 3612 9396 3643 9386
      3618 9454 3650 9455 3650 9330 3612 9328

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 11:58 AM CDT	Areal Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	12 hr
Apr 26, 5:11 PM CDT	Flash Flood Warning	TSA	Benton, Crawford, Washington	4 hr
Apr 26, 5:17 PM CDT	Special Weather Statement	TSA	Washington	43 min
Apr 26, 5:28 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian, Washington	47 min
Apr 26, 5:33 PM CDT	Severe Thunderstorm Warning	TSA	Benton	27 min
Apr 26, 5:37 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	38 min
Apr 26, 5:38 PM CDT	Tornado Warning	TSA	Crawford, Sebastian	37 min
Apr 26, 5:43 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Washington	32 min
Apr 26, 5:50 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Madison, Washington	28 min
Apr 26, 5:56 PM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Sebastian	4 hr
Apr 26, 6:00 PM CDT	Severe Thunderstorm Warning	TSA	Sebastian	30 min
Apr 26, 6:06 PM CDT	Severe Thunderstorm Warning	TSA	Sebastian	54 min
Apr 26, 6:09 PM CDT	Tornado Warning	TSA	Crawford, Franklin, Sebastian	51 min
Apr 26, 6:11 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll	18 min
Apr 26, 6:22 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	38 min
Apr 26, 6:39 PM CDT	Severe Thunderstorm Warning	TSA	Benton	23 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.