Alert archive / Arkansas / Flash Flood Warnings in 2011

Flash Flood Warning 50, NWS Tulsa, OK

May 23, 20114 counties in Arkansas

NWS Tulsa, OK issued this flash flood warning at May 23, 2011, 10:42 PM CDT for 4 counties in Arkansas. It was in force for 3 hr. 1 report 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: May 23, 2011, 10:42 PM CDT (03:42 UTC)
Expired: May 24, 2011, 2:00 AM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

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

The radar

The Western Arkansas radar (KSRX), 54 km from the middle of the area, began a volume at 03:42 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
May 23, 10:43 PM CDT	FLASH FLOOD	Ozark, AR	PORTIONS OF HIGHWAY 64 IN OZARK IS FLOODED AND IMPASSABLE.

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, 3.7 hours before the alert went out and 139 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: 23 J/kg
Mixed-layer CIN: -417 J/kg
Mixed-layer LCL: 1542 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -138 m²/s²
0-3 km storm-relative helicity: -19 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.

077 
WGUS54 KTSA 240342
FFWTSA
ARC033-047-131-143-240700-
/O.NEW.KTSA.FF.W.0050.110524T0342Z-110524T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
1042 PM CDT MON MAY 23 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CRAWFORD COUNTY IN NORTHWEST ARKANSAS...
  EXTREME SOUTHERN WASHINGTON COUNTY IN NORTHWEST ARKANSAS...
  FRANKLIN COUNTY IN WEST CENTRAL ARKANSAS...
  NORTHERN SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS...

* UNTIL 200 AM CDT

* AT 1040 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR            
  INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN HAVE RECENTLY PASSED  
  OVER THE AREA...WITH PERIODS OF LIGHT TO MODERATE RAIN             
  CONTINUING. 1 TO 2 INCHES OF RAIN HAS FALLEN WITHIN THE PAST       
  HOUR. AN ADDITIONAL ONE INCH OF RAIN IS POSSIBLE THROUGH EARLY     
  MORNING. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT COULD EXPERIENCE FLOODING INCLUDE...
  CEDARVILLE...FORT SMITH...MOUNTAINBURG...NATURAL DAM...OZARK...VAN
  BUREN...ALMA...ALTUS...CASS...CHESTER...DYER...FERN...FIGURE
  FIVE...LEE CREEK...MULBERRY...RUDY AND WIEDERKEHR VILLAGE.

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.

&&

LAT...LON 3544 9370 3538 9444 3577 9449 3578 9396
      3576 9396 3576 9392 3578 9390 3577 9369

$$

1 follow-up statement

562 
WGUS74 KTSA 240545
FFSTSA

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1245 AM CDT TUE MAY 24 2011

ARC033-047-131-143-240700-
/O.CON.KTSA.FF.W.0050.000000T0000Z-110524T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CRAWFORD AR-FRANKLIN AR-SEBASTIAN AR-WASHINGTON AR-
1245 AM CDT TUE MAY 24 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EXTREME SOUTHERN
WASHINGTON AND CRAWFORD COUNTIES IN NORTHWEST ARKANSAS...AND NORTHERN
SEBASTIAN AND FRANKLIN COUNTIES IN WEST CENTRAL ARKANSAS UNTIL 200 AM
CDT...

AT 1245 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
AREAS OF LIGHT RAIN ACROSS THE WARNED AREA. ALTHOUGH ADDITIONAL 
RAINFALL AMOUNTS WILL REMAIN LIGHT...1 TO 3 INCHES OF RAIN HAS 
ALREADY FALLEN AND FLOODING OF LOW LYING AREAS WILL LIKELY CONTINUE. 
ROADS WERE REPORTED CLOSED IN THE OZARK ARKANSAS AREA.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CEDARVILLE...FORT SMITH...MOUNTAINBURG...NATURAL DAM...OZARK...VAN
BUREN...ALMA...ALTUS...CASS...CHESTER...DYER...FERN...FIGURE FIVE...
LEE CREEK...MULBERRY...RUDY AND WIEDERKEHR VILLAGE.

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.

&&

LAT...LON 3544 9370 3538 9444 3577 9449 3578 9396
      3576 9396 3576 9392 3578 9390 3577 9369

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 7:20 PM CDT	Flash Flood Warning	TSA	Carroll, Madison	6 hr
May 23, 7:47 PM CDT	Severe Thunderstorm Warning	TSA	Benton	43 min
May 23, 7:59 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	46 min
May 23, 8:22 PM CDT	Flash Flood Warning	TSA	Benton	6 hr
May 23, 8:28 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison	33 min
May 23, 8:39 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Crawford, Madison, Washington	51 min
May 23, 9:04 PM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	41 min
May 23, 9:31 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	59 min
May 23, 9:42 PM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	33 min
May 23, 9:49 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	56 min
May 23, 10:04 PM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Sebastian	4 hr
May 23, 10:08 PM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	47 min
May 23, 10:17 PM CDT	Severe Thunderstorm Warning	TSA	Franklin	28 min
May 24, 12:07 AM CDT	Areal Flood Warning	TSA	Benton, Carroll, Madison, Washington	12 hr
May 24, 1:33 AM CDT	Areal Flood Warning	TSA	Crawford, Franklin, Sebastian	10 hr
May 24, 8:14 AM CDT	Flash Flood Warning	TSA	Carroll	6 hr
May 24, 8:17 AM CDT	River Flood Warning	TSA	Crawford, Sebastian	12 hr
May 24, 8:25 AM CDT	River Flood Warning	TSA	Crawford	13 hr
May 24, 11:55 AM CDT	Areal Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	48 hr
May 24, 1:58 PM CDT	Flash Flood Warning	TSA	Carroll	6 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.