Alert archive / Oklahoma / Flash Flood Warnings in 2015

Flash Flood Warning 40, NWS Tulsa, OK

May 20, 20155 counties in Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 20, 2015, 12:23 AM CDT for 5 counties in Oklahoma. It was in force for 6 hr. 6 reports 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 20, 2015, 12:23 AM CDT (05:23 UTC)
Expired: May 20, 2015, 6:30 AM CDT
In force: 6 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Choctaw County, OK, Latimer County, OK, LeFlore County, OK, Pittsburg County, OK, Pushmataha County, OK

The radar

The Western Arkansas radar (KSRX), 152 km from the middle of the area, began a volume at 05:22 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 20, 1:30 AM CDT	FLASH FLOOD	Clayton, OK	EXTENSIVE FLOODING OF STREETS AND COUNTY ROADS AROUND CLAYTON. 6 TO 6 1/2 INCHES OF RAIN MEASURED IN SEVERAL LOCAL GAUGES...MOSTLY BEFORE 2 AM.
May 20, 1:43 AM CDT	FLASH FLOOD	Talihina, OK	LAW ENFORCEMENT CLOSING ROADWAYS DUE TO HIGH WATER IN THE TALIHINA AREA.
May 20, 2:53 AM CDT	FLASH FLOOD	Talihina, OK	NUMEROUS BUILDINGS IN TOWN HAVE FLOOD WATERS IN THEM...INCLUDING THE HOUSING AUTHORITY WITH 6 INCHES OF WATER...THE CHOCTAW NATION HOSPITAL...AND A NURSING HOME. RELAYED BY COUNTY EMERGENCY MANAGEMENT.
May 20, 5:00 AM CDT	FLASH FLOOD	Nashoba, OK	SEVERAL COUNTY ROADS CLOSED...CUTTING OFF SEVERAL HOMES. REPORTS OF 5 TO 7 INCHES OF RAIN IN THE AREA.
May 20, 5:00 AM CDT	FLASH FLOOD	Talihina, OK	SCHOOLS CLOSED DUE TO HIGH WATER.
May 20, 6:30 AM CDT	FLASH FLOOD	3 W Honobia, OK	COUNTY ROADS CLOSED...UNABLE TO ACCESS STATE HIGHWAY 144 NEAR FEWELL DUE TO HIGH WATER.

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

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 5.4 hours before the alert went out and 232 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: 1306 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 832 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 267 m²/s²
0-3 km storm-relative helicity: 427 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 26.2

Open this sounding in Storm Lab

The text

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

071 
WGUS54 KTSA 200523
FFWTSA
OKC023-077-079-121-127-201130-
/O.NEW.KTSA.FF.W.0040.150520T0523Z-150520T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
1223 AM CDT WED MAY 20 2015

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CHOCTAW COUNTY IN SOUTHEAST OKLAHOMA...
  PUSHMATAHA COUNTY IN SOUTHEAST OKLAHOMA...
  SOUTHERN LATIMER COUNTY IN SOUTHEAST OKLAHOMA...
  SOUTHERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA...
  SOUTHERN PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA...

* UNTIL 630 AM CDT

* AT 1222 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR            
  INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE WARNED AREA. 
  UP TO 2 INCHES OF RAINFALL HAS ALREADY OCCURRED WITH AN ADDITIONAL 
  2 TO 3 INCHES POSSIBLE. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT COULD EXPERIENCE FLOODING INCLUDE...
  ANTLERS...CLAYTON...HUGO...ALBION...BIG CEDAR...BOSWELL...CLAYTON
  LAKE STATE PARK...CLOUDY...DUNBAR...FORT TOWSON...GOODLAND...HUGO
  LAKE STATE PARK...KELLOND...KENT...KIAMICHI...KIOWA...KOSOMA...
  MESSER...MOYERS...MUSE...NASHOBA...OCTAVIA...OLETA...RATTAN...
  RAYMOND GARY STATE PARK...SAWYER...SNOW...SOPER...STANLEY AND
  TUSKAHOMA.

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 3393 9559 3386 9581 3393 9593 3416 9598
      3417 9578 3450 9579 3451 9568 3459 9568
      3459 9588 3468 9589 3468 9609 3473 9610
      3474 9610 3476 9445 3450 9447 3450 9504
      3424 9504 3423 9514 3393 9516 3386 9539

$$

2 follow-up statements

939 
WGUS74 KTSA 200712
FFSTSA

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
212 AM CDT WED MAY 20 2015

OKC023-077-079-121-127-201130-
/O.CON.KTSA.FF.W.0040.000000T0000Z-150520T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHOCTAW OK-LE FLORE OK-PITTSBURG OK-PUSHMATAHA OK-LATIMER OK-
212 AM CDT WED MAY 20 2015

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN LATIMER...
PUSHMATAHA...SOUTHERN PITTSBURG...SOUTHERN LE FLORE AND CHOCTAW
COUNTIES UNTIL 630 AM CDT...

AT 208 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDING FROM WEST OF STANLEY TO 
BIG CEDAR. 3 TO 4 INCHES OF RAINFALL HAS ALREADY OCCURRED WITH AN 
ADDITIONAL 2 TO 3 INCHES POSSIBLE. EXTENSIVE FLASH FLOODING IS 
OCCURRING IN TALIHINA...WITH WATER ENTERING BUILDINGS AND CAUSING 
THE CLOSURE OF ROADWAYS IN THE AREA. STATE HIGHWAY 82 ON THE WEST 
SIDE OF TALIHINA IS IMPASSIBLE. THIS IS A VERY DANGEROUS SITUATION 
WITH ADDITIONAL HEAVY RAINS LIKELY.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
ANTLERS...CLAYTON...HUGO...ALBION...BIG CEDAR...BOSWELL...CLAYTON
LAKE STATE PARK...CLOUDY...DUNBAR...FORT TOWSON...GOODLAND...HUGO
LAKE STATE PARK...KELLOND...KENT...KIAMICHI...KIOWA...KOSOMA...
MESSER...MOYERS...MUSE...NASHOBA...OCTAVIA...OLETA...RATTAN...RAYMOND
GARY STATE PARK...SAWYER...SNOW...SOPER...STANLEY AND TALIHINA.

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 3393 9559 3386 9581 3393 9593 3416 9598
      3417 9578 3450 9579 3451 9568 3459 9568
      3459 9588 3468 9589 3468 9609 3473 9610
      3474 9610 3476 9445 3450 9447 3450 9504
      3424 9504 3423 9514 3393 9516 3386 9539

$$

282 
WGUS74 KTSA 200901
FFSTSA

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
401 AM CDT WED MAY 20 2015

OKC023-077-079-121-127-201130-
/O.CON.KTSA.FF.W.0040.000000T0000Z-150520T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHOCTAW OK-LE FLORE OK-PITTSBURG OK-PUSHMATAHA OK-LATIMER OK-
401 AM CDT WED MAY 20 2015

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN LATIMER...
PUSHMATAHA...SOUTHERN PITTSBURG...SOUTHERN LE FLORE AND CHOCTAW
COUNTIES UNTIL 630 AM CDT...

AT 400 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE WARNED AREA. 3 TO 5 
INCHES OF RAINFALL HAS ALREADY OCCURRED WITH AN ADDITIONAL 1 TO 3 
INCHES POSSIBLE. EXTENSIVE FLOODING HAS BEEN REPORTED IN 
TALIHINA...WITH WATER ENTERING NUMEROUS BUILDINGS AND SEVERAL ROAD 
CLOSURES. THIS IS A VERY DANGEROUS SITUATION.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
ANTLERS...CLAYTON...HUGO...ALBION...BIG CEDAR...BOSWELL...CLAYTON
LAKE STATE PARK...CLOUDY...DUNBAR...FORT TOWSON...GOODLAND...HUGO
LAKE STATE PARK...KELLOND...KENT...KIAMICHI...KIOWA...KOSOMA...
MESSER...MOYERS...MUSE...NASHOBA...OCTAVIA...OLETA...RATTAN...RAYMOND
GARY STATE PARK...SAWYER...SNOW...SOPER...STANLEY AND TALIHINA.

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 3393 9559 3386 9581 3393 9593 3416 9598
      3417 9578 3450 9579 3451 9568 3459 9568
      3459 9588 3468 9589 3468 9609 3473 9610
      3474 9610 3476 9445 3450 9447 3450 9504
      3424 9504 3423 9514 3393 9516 3386 9539

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 10:38 PM CDT	Flash Flood Warning	TSA	Haskell, Latimer, McIntosh, Muskogee, Pittsburg, Sequoyah	6 hr
May 19, 11:23 PM CDT	Special Weather Statement	TSA	Haskell	37 min
May 19, 11:50 PM CDT	Flash Flood Warning	TSA	Latimer, LeFlore, Sequoyah	5 hr
May 20, 12:03 AM CDT	Special Weather Statement	TSA	LeFlore	42 min
May 20, 1:29 AM CDT	Special Weather Statement	TSA	LeFlore	31 min
May 20, 2:21 AM CDT	River Flood Warning	TSA	Pushmataha	9 days
May 20, 2:27 AM CDT	Special Weather Statement	TSA	Pushmataha	48 min
May 20, 3:36 AM CDT	River Flood Warning	TSA	LeFlore	39 hr
May 20, 3:36 AM CDT	River Flood Warning	TSA	LeFlore	15 days
May 20, 4:26 AM CDT	Areal Flood Warning	TSA	Haskell, Latimer, McIntosh, Muskogee, Pittsburg, Sequoyah	12 hr
May 20, 5:01 AM CDT	Flash Flood Warning	TSA	LeFlore, Sequoyah	4 hr
May 20, 6:26 AM CDT	Areal Flood Warning	TSA	Choctaw, Latimer, LeFlore, Pittsburg, Pushmataha	36 hr
May 20, 8:54 AM CDT	Areal Flood Warning	TSA	LeFlore, Sequoyah	24 hr
May 20, 2:04 PM CDT	River Flood Warning	TSA	Choctaw	19 days

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.