Alert archive / Oklahoma / Flash Flood Warnings in 2011

Flash Flood Warning 48, NWS Tulsa, OK

May 23, 20118 counties in Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 23, 2011, 9:03 PM CDT for 8 counties in Oklahoma. It was in force for 6 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, 9:03 PM CDT (02:03 UTC)
Expired: May 24, 2011, 3:00 AM CDT
In force: 6 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Adair County, OK, Cherokee County, OK, Delaware County, OK, Haskell County, OK, Mayes County, OK, Muskogee County, OK, Sequoyah County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 70 km from the middle of the area, began a volume at 02:05 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, 10:22 PM CDT	FLASH FLOOD	Westville, OK	BETWEEN WESTVILLE AND STILWELL HIGHWAY 59 IS CLOSED. CARS STRANDED IN WATER.

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, 2.1 hours before the alert went out and 176 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.

153 
WGUS54 KTSA 240203
FFWTSA
OKC001-021-041-061-097-101-135-145-240800-
/O.NEW.KTSA.FF.W.0048.110524T0203Z-110524T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ADAIR COUNTY IN NORTHEAST OKLAHOMA...
  CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA...
  EASTERN WAGONER COUNTY IN NORTHEAST OKLAHOMA...
  MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA...
  NORTHEASTERN HASKELL COUNTY IN SOUTHEAST OKLAHOMA...
  SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA...
  SOUTHEASTERN MAYES COUNTY IN NORTHEAST OKLAHOMA...
  SOUTHERN DELAWARE COUNTY IN NORTHEAST OKLAHOMA...

* UNTIL 300 AM CDT

* AT 902 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE WARNED AREA. 1 TO 2
  INCHES OF RAINFALL HAS ALREADY OCCURRED...WITH A FEW LOCAL AMOUNTS 
  AROUND 3 INCHES. AN ADDITIONAL 1 TO 2 INCHES IS POSSIBLE INTO THE
  OVERNIGHT HOURS. 

  MAJOR STREET FLOODING HAS BEEN REPORTED IN MUSKOGEE AND TAHLEQUAH.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT COULD EXPERIENCE FLOODING INCLUDE...
  MUSKOGEE...SALLISAW...STILWELL...TAHLEQUAH...WAGONER...BARON...
  BOYNTON...BRAGGS...BRUSHY...BUNCH...CHRISTIE...COOKSON...ELDON...
  FORT GIBSON...GANS...GORE...HULBERT...KANSAS...KEEFETON...LEACH...
  LOCUST GROVE...MARBLE CITY...MARIETTA...MULDROW...OAKS...OKAY...
  OKTAHA...PEGGS...PORTER AND PORUM.

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 3617 9457 3538 9444 3536 9475 3531 9519
      3532 9535 3555 9535 3556 9570 3576 9571
      3633 9505

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 7:14 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Mayes	46 min
May 23, 7:16 PM CDT	Flash Flood Warning	TSA	Craig, Delaware, Mayes, Nowata, Ottawa, Rogers	6 hr
May 23, 7:47 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	43 min
May 23, 7:59 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Muskogee, Sequoyah	46 min
May 23, 8:32 PM CDT	River Flood Warning	TSA	Ottawa	24 hr
May 23, 8:34 PM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Delaware, Mayes, Muskogee, Sequoyah and 1 more	116 min
May 23, 8:39 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, Sequoyah	51 min
May 23, 8:41 PM CDT	Special Weather Statement	TSA	Creek	49 min
May 23, 9:04 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	41 min
May 23, 9:42 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	33 min
May 23, 9:49 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	56 min
May 23, 9:53 PM CDT	High Wind Warning	TSA	Creek, McIntosh, Muskogee, Okfuskee, Okmulgee, Tulsa and 1 more	4 hr
May 23, 10:04 PM CDT	Flash Flood Warning	TSA	Haskell, LeFlore, Sequoyah	4 hr
May 23, 10:08 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	47 min
May 23, 10:48 PM CDT	Special Weather Statement	TSA	Latimer, LeFlore	42 min
May 23, 10:59 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	46 min
May 23, 11:00 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	45 min
May 23, 11:29 PM CDT	Areal Flood Advisory	TSA	Creek, Okfuskee, Okmulgee	2 hr
May 24, 12:07 AM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Craig, Delaware, Mayes, Nowata and 3 more	12 hr
May 24, 12:12 AM CDT	Special Weather Statement	TSA	Tulsa	33 min
May 24, 1:33 AM CDT	Areal Flood Warning	TSA	Haskell, LeFlore, McIntosh, Muskogee, Sequoyah	10 hr
May 24, 1:51 AM CDT	River Flood Warning	TSA	Cherokee, Delaware	7 hr
May 24, 1:51 AM CDT	River Flood Warning	TSA	Cherokee	13 hr
May 24, 8:22 AM CDT	River Flood Warning	TSA	LeFlore	44 hr
May 24, 8:25 AM CDT	River Flood Warning	TSA	Sequoyah	13 hr
May 24, 11:55 AM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Craig, Delaware, Haskell, LeFlore and 8 more	48 hr
May 24, 6:08 PM CDT	Tornado Warning	TSA	Creek, Osage, Pawnee	67 min
May 24, 6:49 PM CDT	Tornado Warning	TSA	Osage, Pawnee	41 min
May 24, 6:53 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Osage, Pawnee, Tulsa	67 min

Nearby

Flash Flood Warnings in Oklahoma, 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.