Alert archive / Oklahoma / Flash Flood Warnings in 2015

Flash Flood Warning 65, NWS Tulsa, OK

May 27, 20156 counties in Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 27, 2015, 12:15 AM CDT for 6 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 27, 2015, 12:15 AM CDT (05:15 UTC)
Expired: May 27, 2015, 6:00 AM CDT
In force: 6 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Cherokee County, OK, Creek County, OK, Mayes County, OK, Okmulgee County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 24 km from the middle of the area, began a volume at 05:17 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 27, 3:15 AM CDT	FLASH FLOOD	Glenpool, OK	A FEW STREETS FLOODED IN TOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.3 hours before the alert went out and 181 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: 2696 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 836 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

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

964 
WGUS54 KTSA 270515
FFWTSA
OKC021-037-097-111-143-145-271100-
/O.NEW.KTSA.FF.W.0065.150527T0515Z-150527T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
1215 AM CDT WED MAY 27 2015

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL CREEK COUNTY IN NORTHEAST OKLAHOMA...
  NORTH CENTRAL OKMULGEE COUNTY IN NORTHEAST OKLAHOMA...
  NORTHWESTERN CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA...
  SOUTHEASTERN TULSA COUNTY IN NORTHEAST OKLAHOMA...
  SOUTHWESTERN MAYES COUNTY IN NORTHEAST OKLAHOMA...
  WAGONER COUNTY IN NORTHEAST OKLAHOMA...

* UNTIL 600 AM CDT

* AT 1214 AM 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 AN ADDITIONAL 1 TO 2  
  INCHES. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT COULD EXPERIENCE FLOODING INCLUDE...
  BROKEN ARROW...TULSA...WAGONER...BIXBY...COWETA...GLENPOOL...
  HULBERT...JENKS...JENKS RIVERSIDE AIRPORT...KIEFER...MOUNDS...
  OKAY...ONETA...PEGGS...PORTER...SAPULPA...SEQUOYAH STATE PARK...
  STONEBLUFF AND TULLAHASSEE.

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 3605 9614 3610 9556 3608 9558 3607 9545
      3611 9544 3615 9496 3581 9498 3582 9564
      3586 9566 3586 9576 3582 9577 3582 9606

$$

2 follow-up statements

794 
WGUS74 KTSA 270721
FFSTSA

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
221 AM CDT WED MAY 27 2015

OKC021-037-097-111-143-145-271100-
/O.CON.KTSA.FF.W.0065.000000T0000Z-150527T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHEROKEE OK-CREEK OK-MAYES OK-OKMULGEE OK-TULSA OK-WAGONER OK-
221 AM CDT WED MAY 27 2015

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR WAGONER...SOUTHEASTERN
TULSA...NORTH CENTRAL OKMULGEE...SOUTHWESTERN MAYES...EAST CENTRAL
CREEK AND NORTHWESTERN CHEROKEE COUNTIES UNTIL 600 AM CDT...

AT 220 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAIN REDEVELOPING OVER SOUTHERN TULSA 
COUNTY. 1 TO 2 INCHES OF RAINFALL HAS ALREADY OCCURRED ACROSS THE 
WARNED AREA WITH AN ADDITIONAL INCH POSSIBLE. 

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
BROKEN ARROW...TULSA...WAGONER...BIXBY...COWETA...GLENPOOL...
HULBERT...JENKS...JENKS RIVERSIDE AIRPORT...KIEFER...MOUNDS...OKAY...
ONETA...PEGGS...PORTER...SAPULPA...SEQUOYAH STATE PARK...STONEBLUFF
AND TULLAHASSEE.

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 3605 9614 3610 9556 3608 9558 3607 9545
      3611 9544 3615 9496 3581 9498 3582 9564
      3586 9566 3586 9576 3582 9577 3582 9606

$$

649 
WGUS74 KTSA 271106
FFSTSA

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
606 AM CDT WED MAY 27 2015

OKC021-037-097-111-143-145-271121-
/O.EXP.KTSA.FF.W.0065.000000T0000Z-150527T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHEROKEE OK-CREEK OK-MAYES OK-OKMULGEE OK-TULSA OK-WAGONER OK-
606 AM CDT WED MAY 27 2015

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WAGONER...
SOUTHEASTERN TULSA...NORTH CENTRAL OKMULGEE...SOUTHWESTERN MAYES...
EAST CENTRAL CREEK AND NORTHWESTERN CHEROKEE COUNTIES HAS BEEN
ALLOWED TO EXPIRE...

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 3605 9614 3610 9556 3608 9558 3607 9545
      3611 9544 3615 9496 3581 9498 3582 9564
      3586 9566 3586 9576 3582 9577 3582 9606

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 8:40 PM CDT	Special Weather Statement	TSA	Wagoner	35 min
May 26, 9:00 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Wagoner	23 min
May 26, 9:59 PM CDT	Special Weather Statement	TSA	Wagoner	31 min
May 26, 10:25 PM CDT	Special Weather Statement	TSA	Pawnee	35 min
May 26, 10:40 PM CDT	Special Weather Statement	TSA	Wagoner	35 min
May 26, 10:45 PM CDT	Special Weather Statement	TSA	Creek	30 min
May 26, 10:53 PM CDT	Areal Flood Advisory	TSA	Creek, Osage, Pawnee, Tulsa	82 min
May 26, 11:47 PM CDT	Special Weather Statement	TSA	Tulsa	28 min
May 26, 11:50 PM CDT	Special Weather Statement	TSA	Wagoner	25 min
May 27, 12:03 AM CDT	Areal Flood Advisory	TSA	Cherokee, Creek, Mayes, Muskogee, Okmulgee, Rogers and 2 more	117 min
May 27, 12:25 AM CDT	Special Weather Statement	TSA	Cherokee, Wagoner	35 min
May 27, 12:40 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	50 min
May 27, 1:04 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee	41 min
May 27, 1:15 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Haskell, Muskogee, Sequoyah, Wagoner	45 min
May 27, 1:20 AM CDT	Special Weather Statement	TSA	Adair, Cherokee	25 min
May 27, 1:32 AM CDT	Flash Flood Warning	TSA	Adair, Cherokee	4 hr
May 27, 1:35 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Sequoyah	40 min
May 27, 1:57 AM CDT	Special Weather Statement	TSA	Cherokee, Sequoyah	48 min
May 27, 2:29 AM CDT	Special Weather Statement	TSA	Tulsa	31 min

Nearby

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.