Alert archive / Oklahoma / Flash Flood Warnings in 2013

Flash Flood Warning 9, NWS Tulsa, OK

May 21, 20137 counties in Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 21, 2013, 6:44 AM CDT for 7 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 21, 2013, 6:44 AM CDT (11:44 UTC)
Expired: May 21, 2013, 12:30 PM CDT
In force: 6 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Haskell County, OK, Latimer County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 114 km from the middle of the area, began a volume at 11:47 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 21, 10:27 AM CDT	FLASH FLOOD	Gans, OK	A FEW LOW LYING ROADS UNDER WATER

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, 11.7 hours before the alert went out and 164 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: 1675 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 1192 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 270 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 8.8

Open this sounding in Storm Lab

The text

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

666 
WGUS54 KTSA 211144
FFWTSA
OKC061-077-079-091-101-121-135-211730-
/O.NEW.KTSA.FF.W.0009.130521T1144Z-130521T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
644 AM CDT TUE MAY 21 2013

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HASKELL COUNTY IN SOUTHEAST OKLAHOMA...
  NORTHERN LATIMER COUNTY IN SOUTHEAST OKLAHOMA...
  NORTHERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA...
  PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA...
  SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA...
  SOUTHEASTERN MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA...
  SOUTHERN MCINTOSH COUNTY IN SOUTHEAST OKLAHOMA...

* UNTIL 1230 PM CDT

* AT 643 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE WARNED AREA. 2 INCHES  
  OF RAINFALL HAS ALREADY OCCURRED WITH AN ADDITIONAL 1 TO 2 INCHES 
  POSSIBLE.   

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT COULD EXPERIENCE FLOODING INCLUDE...
  EUFAULA...MCALESTER...POTEAU...SALLISAW...STIGLER...WILBURTON...
  ALDERSON...ARROWHEAD STATE PARK...ASHLAND...BLOCKER...BOKOSHE...
  BRIARTOWN...CAMERON...CANADIAN...CROWDER...ENTERPRISE...GANS...
  HANNA...HAYWOOD...INDIANOLA...KEOTA...KINTA...KREBS...LEQUIRE...
  MCALESTER REGIONAL AIRPORT...MCCURTAIN...MULDROW...PANAMA...POCOLA
  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.

&&

LAT...LON 3505 9610 3516 9599 3528 9599 3560 9448
      3507 9445 3476 9609

$$

1 follow-up statement

880 
WGUS74 KTSA 211439
FFSTSA

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
939 AM CDT TUE MAY 21 2013

OKC061-077-079-091-101-121-135-211730-
/O.CON.KTSA.FF.W.0009.000000T0000Z-130521T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HASKELL OK-LE FLORE OK-MCINTOSH OK-MUSKOGEE OK-PITTSBURG OK-
SEQUOYAH OK-LATIMER OK-
939 AM CDT TUE MAY 21 2013

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN LATIMER...
SEQUOYAH...PITTSBURG...SOUTHEASTERN MUSKOGEE...SOUTHERN MCINTOSH...
NORTHERN LE FLORE AND HASKELL COUNTIES UNTIL 1230 PM CDT...

AT 936 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN 
AREA OF MODERATE RAIN WITH EMBEDDED THUNDERSTORMS OVER THE WARNED 
AREA. WHILE THE HEAVIEST RAINFALL HAS SHIFTED SOUTH OF THE AREA.... 
ADDITIONAL ROUNDS OF SHOWERS AND THUNDERSTORMS WILL OCCUR THROUGH 
THE MORNING. 3 TO 4 INCHES OF RAINFALL HAS ALREADY OCCURRED WITH AN 
ADDITIONAL 1 TO 2 INCHES POSSIBLE. 

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
EUFAULA...MCALESTER...POTEAU...SALLISAW...STIGLER...WILBURTON...
ALDERSON...ARROWHEAD STATE PARK...ASHLAND...BLOCKER...BOKOSHE...
BRIARTOWN...CAMERON...CANADIAN...CROWDER...ENTERPRISE...GANS...
HANNA...HAYWOOD...INDIANOLA...KEOTA...KINTA...KREBS...LEQUIRE...
MCALESTER REGIONAL AIRPORT...MCCURTAIN...MULDROW...PANAMA...POCOLA
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.

LOW WATER CROSSINGS IN HILLY TERRAIN ARE ESPECIALLY DANGEROUS IN
HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND
ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER
TO CARRY VEHICLES AWAY.

&&

LAT...LON 3505 9610 3516 9599 3528 9599 3560 9448
      3507 9445 3476 9609

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 7:04 PM CDT	Tornado Warning	TSA	Latimer, Pittsburg, Pushmataha	41 min
May 20, 7:23 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Haskell, LeFlore, Sequoyah	67 min
May 20, 7:31 PM CDT	Tornado Warning	TSA	Sequoyah	44 min
May 20, 7:50 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg, Pushmataha, Sequoyah	70 min
May 20, 7:57 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	63 min
May 20, 8:02 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	58 min
May 20, 8:07 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Latimer, Pittsburg, Pushmataha	68 min
May 20, 8:18 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	57 min
May 20, 8:21 PM CDT	High Wind Warning	TSA	McIntosh, Muskogee, Pittsburg	4 hr
May 20, 8:30 PM CDT	Tornado Warning	TSA	Haskell, Latimer, LeFlore, Sequoyah	60 min
May 20, 8:34 PM CDT	River Flood Warning	TSA	Ottawa	61 hr
May 20, 8:52 PM CDT	Tornado Warning	TSA	Haskell, LeFlore, Sequoyah	38 min
May 20, 8:57 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Latimer, LeFlore, Pushmataha	63 min
May 20, 10:13 PM CDT	Tornado Warning	TSA	Choctaw, Pushmataha	47 min
May 20, 10:25 PM CDT	Special Weather Statement	TSA	Rogers	35 min
May 20, 10:55 PM CDT	Special Weather Statement	TSA	Rogers	35 min
May 20, 11:12 PM CDT	Areal Flood Advisory	TSA	Rogers, Tulsa	2 hr
May 20, 11:15 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	45 min
May 20, 11:36 PM CDT	Special Weather Statement	TSA	Pittsburg	24 min
May 20, 11:50 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	25 min
May 20, 11:56 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	34 min
May 21, 12:14 AM CDT	Special Weather Statement	TSA	Pittsburg	31 min
May 21, 12:45 AM CDT	Special Weather Statement	TSA	Pittsburg	30 min
May 21, 1:12 AM CDT	Special Weather Statement	TSA	Pittsburg	33 min
May 21, 1:23 AM CDT	Special Weather Statement	TSA	Pittsburg	37 min
May 21, 1:32 AM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	43 min
May 21, 1:35 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, Pittsburg	40 min
May 21, 2:11 AM CDT	Areal Flood Advisory	TSA	Pittsburg	2 hr
May 21, 2:17 AM CDT	Special Weather Statement	TSA	LeFlore	28 min
May 21, 2:23 AM CDT	Special Weather Statement	TSA	Latimer, LeFlore	52 min
May 21, 2:45 AM CDT	Special Weather Statement	TSA	LeFlore	45 min
May 21, 8:55 AM CDT	Flash Flood Warning	TSA	Latimer, LeFlore, Pittsburg, Pushmataha	4 hr
May 21, 9:30 AM CDT	Special Weather Statement	TSA	Mayes, Muskogee, Rogers, Wagoner	60 min
May 21, 10:32 AM CDT	Special Weather Statement	TSA	Adair, Cherokee, Delaware, Haskell, Sequoyah	58 min
May 21, 10:33 AM CDT	Special Weather Statement	TSA	Adair, Cherokee, Delaware, Haskell, Sequoyah	57 min
May 21, 12:15 PM CDT	Flash Flood Warning	TSA	Haskell, Latimer, LeFlore, McIntosh, Muskogee, Pittsburg and 1 more	6 hr
May 21, 12:19 PM CDT	Flash Flood Warning	TSA	Latimer, LeFlore, Pittsburg, Pushmataha	6 hr
May 21, 12:57 PM CDT	Special Weather Statement	TSA	Creek, McIntosh, Okfuskee, Okmulgee	48 min
May 21, 1:22 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okfuskee, Okmulgee, Pittsburg	38 min
May 21, 1:58 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Haskell, Latimer, McIntosh, Pittsburg, Pushmataha	62 min
May 21, 2:01 PM CDT	River Flood Warning	TSA	Pushmataha	40 hr
May 21, 2:30 PM CDT	River Flood Warning	TSA	LeFlore	43 hr
May 21, 2:58 PM CDT	Special Weather Statement	TSA	Choctaw, Haskell, Latimer, LeFlore, Pushmataha	62 min
May 21, 3:20 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	25 min
May 21, 5:51 PM CDT	Areal Flood Warning	TSA	Haskell, Latimer, LeFlore, McIntosh, Muskogee, Pittsburg and 2 more	24 hr

Nearby

Flash Flood Warnings in Oklahoma, 2013 Every flash flood warning in 2013

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.