Alert archive / Arkansas / Flash Flood Warnings in 2011

Flash Flood Warning 24, NWS Tulsa, OK

April 26, 2011Crawford County, Franklin County, Sebastian County, Arkansas

NWS Tulsa, OK issued this flash flood warning at Apr 26, 2011, 5:56 PM CDT for Crawford County, Franklin County, Sebastian County, 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, 5:56 PM CDT (22:56 UTC)
Expired: Apr 26, 2011, 10:00 PM CDT
In force: 4 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Crawford County, AR, Franklin County, AR, Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 33 km from the middle of the area, began a volume at 22:57 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.9 hours before the alert went out and 174 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.

521 
WGUS54 KTSA 262256
FFWTSA
ARC033-047-131-270300-
/O.NEW.KTSA.FF.W.0024.110426T2256Z-110427T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CRAWFORD COUNTY IN NORTHWEST ARKANSAS...
  FRANKLIN COUNTY IN WEST CENTRAL ARKANSAS...
  SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS...

* UNTIL 1000 PM CDT

* AT 554 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 
CATASTROPHIC FLOODING IS ALREADY OCCURRING. ANY ADDITIONAL RAINFALL 
WILL WORSEN THE ONGOING FLOODING SITUATION. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT COULD EXPERIENCE FLOODING INCLUDE...
  CEDARVILLE...CHARLESTON...FORT SMITH...MOUNTAINBURG...NATURAL
  DAM...OZARK...VAN BUREN...ALMA...ALTUS...BARLING...BLOOMER...
  BONANZA...BRANCH...BURNVILLE...CASS...DENNING...DYER...EXCELSIOR...
  FERN...FIGURE FIVE...FORT CHAFFEE...GREENWOOD...HACKETT...
  HARTFORD...HUNTINGTON...JENNY LIND...LAVACA...MANSFIELD...MIDLAND
  AND MULBERRY.

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 3538 9369 3537 9374 3539 9379 3531 9381
      3531 9391 3522 9392 3523 9402 3514 9403
      3514 9413 3510 9415 3507 9423 3496 9423
      3492 9444 3541 9443 3568 9448 3567 9398
      3577 9397 3577 9370 3568 9368

$$

1 follow-up statement

032 
WGUS74 KTSA 270251
FFSTSA

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

ARC033-047-131-270306-
/O.EXP.KTSA.FF.W.0024.000000T0000Z-110427T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SEBASTIAN AR-CRAWFORD AR-FRANKLIN AR-
951 PM CDT TUE APR 26 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR FRANKLIN...CRAWFORD
AND SEBASTIAN COUNTIES WILL BE ALLOWED TO EXPIRE AT 1000 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 3538 9369 3537 9374 3539 9379 3531 9381
      3531 9391 3522 9392 3523 9402 3514 9403
      3514 9413 3510 9415 3507 9423 3496 9423
      3492 9444 3541 9443 3568 9448 3567 9398
      3577 9397 3577 9370 3568 9368

$$

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, 5:42 PM CDT	Flash Flood Warning	TSA	Benton, Carroll, Madison, Washington	4 hr
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, 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.