Alert archive / Oklahoma / Flash Flood Warnings in 2021

Flash Flood Warning 19, NWS Tulsa, OK

May 27, 2021Osage County, Washington County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 27, 2021, 4:08 PM CDT for Osage County, Washington County, Oklahoma. It was in force for 3 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, 2021, 4:08 PM CDT (21:08 UTC)
Expired: May 27, 2021, 6:51 PM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Osage County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 83 km from the middle of the area, began a volume at 21:07 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, 5:00 PM CDT	FLASH FLOOD	1 Se Tallant, OK	FLASH FLOODING REPORTED AT COUNTY ROAD 2460 AND STATE HIGHWAY 11.

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 12:00Z, 9.1 hours before the alert went out and 205 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: 2431 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 765 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 264 m²/s²
0-3 km storm-relative helicity: 360 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

As transmitted.

320 
WGUS54 KTSA 272108
FFWTSA
OKC113-147-280000-
/O.NEW.KTSA.FF.W.0019.210527T2108Z-210528T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
408 PM CDT Thu May 27 2021

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Northeastern Osage County in northeastern Oklahoma...
  Washington OK County in northeastern Oklahoma...

* Until 700 PM CDT.

* At 408 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Bartlesville...                    Pawhuska...
  Dewey...                           Barnsdall...
  Copan...                           Wynona...
  Ochelata...                        Okesa...
  Osage Hills State Park...          Bartlesville Municipal Airport...
  Sunset Lake...                     Bigheart...
  Hulah...                           Tallant...
  Nelagoney...                       Wah Sha She State Park...
  Pershing...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3652 9620 3650 9662 3670 9638 3671 9635
      3688 9629 3700 9629 3700 9579 3694 9579
      3694 9581 3661 9581

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.5-1 INCH IN 1 HOUR 

$$

RJS

1 follow-up statement

527 
WGUS74 KTSA 272351
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
651 PM CDT Thu May 27 2021

OKC113-147-280001-
/O.CAN.KTSA.FF.W.0019.000000T0000Z-210528T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Osage OK-Washington OK-
651 PM CDT Thu May 27 2021

...FLASH FLOOD WARNING FOR NORTHEASTERN OSAGE AND WASHINGTON OK 
COUNTIES HAS BEEN REPLACED WITH A FLOOD WARNING...

Rain is ending across the warned area. However, flooding will 
continue across portions of the warned area.

LAT...LON 3652 9620 3650 9662 3670 9638 3671 9635
      3688 9629 3700 9629 3700 9579 3694 9579
      3694 9581 3661 9581

$$

RJS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 9:08 AM CDT	River Flood Warning	TSA	Ottawa	29 hr
May 27, 9:58 AM CDT	River Flood Advisory	TSA	Cherokee	4 days
May 27, 10:46 AM CDT	Flash Flood Watch	TSA	Adair, Cherokee, Craig, Creek, Delaware, McIntosh and 11 more	11 hr
May 27, 11:31 AM CDT	Areal Flood Advisory	TSA	Ottawa	3 hr
May 27, 12:30 PM CDT	Special Weather Statement	TSA	Washington	45 min
May 27, 12:41 PM CDT	Special Weather Statement	TSA	Ottawa	34 min
May 27, 12:46 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	44 min
May 27, 12:57 PM CDT	Severe Thunderstorm Warning	TSA	Osage	27 min
May 27, 1:12 PM CDT	Special Weather Statement	TSA	Nowata, Washington	63 min
May 27, 1:26 PM CDT	Special Weather Statement	TSA	Osage	34 min
May 27, 1:29 PM CDT	Special Weather Statement	TSA	Ottawa	46 min
May 27, 1:30 PM CDT	Flash Flood Warning	TSA	Ottawa	6 hr
May 27, 1:35 PM CDT	Areal Flood Advisory	TSA	Craig, Nowata	2 hr
May 27, 1:40 PM CDT	Areal Flood Advisory	TSA	Osage, Pawnee	3 hr
May 27, 1:55 PM CDT	Special Weather Statement	TSA	Osage	65 min
May 27, 2:36 PM CDT	Areal Flood Advisory	TSA	Osage, Washington	92 min
May 27, 2:37 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Rogers, Washington	53 min
May 27, 2:54 PM CDT	River Flood Warning	TSA	Cherokee	5 hr
May 27, 2:54 PM CDT	River Flood Advisory	TSA	Cherokee, Delaware	22 hr
May 27, 2:54 PM CDT	River Flood Advisory	TSA	Adair, Cherokee, Delaware	35 hr
May 27, 3:08 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Washington	52 min
May 27, 3:15 PM CDT	Special Weather Statement	TSA	Osage	45 min
May 27, 3:18 PM CDT	Severe Thunderstorm Warning	TSA	Creek	57 min
May 27, 3:23 PM CDT	Severe Thunderstorm Warning	TSA	Osage	37 min
May 27, 3:27 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Rogers	63 min
May 27, 3:42 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	48 min
May 27, 3:49 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Osage, Pawnee, Rogers and 2 more	56 min
May 27, 3:51 PM CDT	Flash Flood Warning	TSA	Craig, Nowata	3 hr
May 27, 4:15 PM CDT	Special Weather Statement	TSA	Okmulgee	30 min
May 27, 4:18 PM CDT	Flash Flood Warning	TSA	Osage, Pawnee, Rogers, Tulsa, Washington	3 hr
May 27, 4:26 PM CDT	Special Weather Statement	TSA	Tulsa, Wagoner	34 min
May 27, 4:34 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa	56 min
May 27, 4:42 PM CDT	Areal Flood Advisory	TSA	Creek, Okmulgee, Rogers, Tulsa, Wagoner	3 hr
May 27, 4:46 PM CDT	Special Weather Statement	TSA	Delaware, Mayes	59 min
May 27, 4:51 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	39 min
May 27, 4:59 PM CDT	Flash Flood Warning	TSA	Craig, Delaware, Mayes, Rogers	3 hr
May 27, 5:07 PM CDT	Special Weather Statement	TSA	Wagoner	38 min
May 27, 5:26 PM CDT	Special Weather Statement	TSA	Delaware	34 min
May 27, 5:26 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	64 min
May 27, 5:39 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	51 min
May 27, 5:47 PM CDT	Special Weather Statement	TSA	Okmulgee	43 min
May 27, 6:06 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	39 min
May 27, 6:07 PM CDT	Flash Flood Warning	TSA	Creek, Okfuskee, Okmulgee	3 hr
May 27, 6:10 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	50 min
May 27, 6:26 PM CDT	Flash Flood Warning	TSA	Adair, Cherokee, Muskogee, Okmulgee, Wagoner	2 hr
May 27, 6:34 PM CDT	Special Weather Statement	TSA	Cherokee	41 min
May 27, 6:35 PM CDT	Areal Flood Warning	TSA	Craig, Nowata	12 hr
May 27, 6:35 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	40 min
May 27, 6:51 PM CDT	Areal Flood Warning	TSA	Osage, Washington	12 hr
May 27, 6:51 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okmulgee	39 min
May 27, 6:59 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okfuskee, Okmulgee, Pittsburg	46 min

Nearby

Flash Flood Warnings in Oklahoma, 2021 Every flash flood warning in 2021

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.