Alert archive / Arkansas / Flash Flood Warnings in 2015

Flash Flood Warning 34, NWS Tulsa, OK

May 11, 2015Crawford County, Franklin County, Sebastian County, Arkansas; Haskell County, LeFlore County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 11, 2015, 2:28 AM CDT for Crawford County, Franklin County, Sebastian County, Arkansas; Haskell County, LeFlore County, Sequoyah County, Oklahoma. It was in force for 3 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: May 11, 2015, 2:28 AM CDT (07:28 UTC)
Expired: May 11, 2015, 5:30 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, Haskell County, OK, LeFlore County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 17 km from the middle of the area, began a volume at 07:32 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 00:00Z, 7.5 hours before the alert went out and 190 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: 66 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 1012 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 260 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

148 
WGUS54 KTSA 110728
FFWTSA
ARC033-047-131-OKC061-079-135-111030-
/O.NEW.KTSA.FF.W.0034.150511T0728Z-150511T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
228 AM CDT MON MAY 11 2015

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CRAWFORD COUNTY IN NORTHWEST ARKANSAS...
  FRANKLIN COUNTY IN WEST CENTRAL ARKANSAS...
  NORTHEASTERN HASKELL COUNTY IN SOUTHEAST OKLAHOMA...
  NORTHEASTERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA...
  SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS...
  SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA...

* UNTIL 530 AM CDT

* AT 226 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAIN OVER PARTS OF THE WARNED AREA.  
  ANOTHER INCH OF RAIN IS POSSIBLE THROUGH 530 AM...WHICH WILL FALL  
  OVER AREAS THAT HAVE RECEIVED UP TO 5 INCHES OF RAIN OVER THE PAST 
  24 HOURS.

* 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...POTEAU...SALLISAW...VAN BUREN...ALMA...ALTUS...
  ARKOMA...BARLING...BIG CEDAR...BLOOMER...BOKOSHE...BONANZA...
  BRANCH...BRUSHY...BRUSHY LAKE STATE PARK...BURNVILLE...CAMERON...
  CASS...CHESTER...DENNING...DYER...EXCELSIOR...FERN...FIGURE FIVE
  AND FORT CHAFFEE.

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.

&&

LAT...LON 3538 9370 3536 9375 3540 9380 3532 9382
      3532 9390 3523 9394 3522 9402 3513 9404
      3514 9413 3509 9421 3496 9425 3492 9444
      3454 9446 3451 9459 3546 9505 3555 9513
      3560 9513 3573 9369

$$

1 follow-up statement

724 
WGUS74 KTSA 111022
FFSTSA

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
522 AM CDT MON MAY 11 2015

ARC033-047-131-OKC061-079-135-111037-
/O.EXP.KTSA.FF.W.0034.000000T0000Z-150511T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CRAWFORD AR-FRANKLIN AR-SEBASTIAN AR-HASKELL OK-LE FLORE OK-
SEQUOYAH OK-
522 AM CDT MON MAY 11 2015

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SEQUOYAH...
NORTHEASTERN LE FLORE...NORTHEASTERN HASKELL...SEBASTIAN...FRANKLIN
AND CRAWFORD COUNTIES WILL BE ALLOWED TO EXPIRE AT 530 AM CDT...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3538 9370 3536 9375 3540 9380 3532 9382
      3532 9390 3523 9394 3522 9402 3513 9404
      3514 9413 3509 9421 3496 9425 3492 9444
      3454 9446 3451 9459 3546 9505 3555 9513
      3560 9513 3573 9369

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 8:30 PM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Sebastian	6 hr
May 10, 8:38 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Sebastian	52 min
May 10, 9:08 PM CDT	Special Weather Statement	TSA	Crawford, Washington	37 min
May 10, 9:24 PM CDT	Special Weather Statement	TSA	Franklin	36 min
May 11, 4:20 AM CDT	River Flood Warning	TSA	Crawford	28 hr
May 11, 1:51 PM CDT	Areal Flood Warning	TSA	Crawford, Franklin, Sebastian	24 hr
May 10, 7:01 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	44 min
May 10, 7:21 PM CDT	Tornado Warning	TSA	Haskell, Latimer	39 min
May 10, 7:30 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	45 min
May 10, 7:55 PM CDT	Tornado Warning	TSA	Haskell, Latimer, LeFlore	20 min
May 10, 8:14 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Sequoyah	46 min
May 10, 8:21 PM CDT	Tornado Warning	TSA	LeFlore	39 min
May 10, 8:28 PM CDT	Special Weather Statement	TSA	Pushmataha	47 min
May 10, 9:07 PM CDT	Special Weather Statement	TSA	Latimer	38 min
May 10, 11:55 PM CDT	Flash Flood Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg, Pushmataha	3 hr

Nearby

Flash Flood Warnings in Arkansas, 2015 Flash Flood Warnings in Oklahoma, 2015 Every flash flood warning in 2015

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.