Alert archive / Oklahoma / Flash Flood Warnings in 2021

Flash Flood Warning 24, NWS Tulsa, OK

May 27, 20219 counties in Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 27, 2021, 7:37 PM CDT for 9 counties in Oklahoma. It was in force for 3 hr. 2 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 27, 2021, 7:37 PM CDT (00:37 UTC)
Expired: May 27, 2021, 10:43 PM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Adair County, OK, Cherokee County, OK, Haskell County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Sequoyah County, OK

The radar

The Tulsa radar (KINX), 89 km from the middle of the area, began a volume at 00:36 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, 8:22 PM CDT	FLASH FLOOD	Vian, OK	3 INCHES OF WATER OVER HIGHWAY 64. RELAYED BY EMERGENCY MANAGEMENT.
May 27, 8:58 PM CDT	FLASH FLOOD	Sallisaw, OK	STREET FLOODING REPORTED ON WEST REDWOOD STREET.

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, 0.6 hours before the alert went out and 315 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: 1480 J/kg
Mixed-layer CIN: -150 J/kg
Mixed-layer LCL: 1331 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

088 
WGUS54 KTSA 280037
FFWTSA
OKC001-021-061-091-101-107-111-121-135-280430-
/O.NEW.KTSA.FF.W.0024.210528T0037Z-210528T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Southeastern Cherokee County in east central Oklahoma...
  Southern Muskogee County in east central Oklahoma...
  Southern Okfuskee County in east central Oklahoma...
  Northwestern Sequoyah County in east central Oklahoma...
  Southern Adair County in northeastern Oklahoma...
  Southern Okmulgee County in northeastern Oklahoma...
  Northern Haskell County in southeastern Oklahoma...
  McIntosh County in southeastern Oklahoma...
  Northwestern Pittsburg County in southeastern Oklahoma...

* Until 1130 PM CDT.

* At 737 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...
  Sallisaw...                        Stilwell...
  Okemah...                          Eufaula...
  Henryetta...                       Checotah...
  Warner...                          Vian...
  Weleetka...                        Gore...
  Dewar...                           Porum...
  Webbers Falls...                   Schulter...
  Oktaha...                          Marble City...
  Braggs...                          Tamaha...
  Indianola...                       Grayson...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3544 9657 3540 9654 3547 9661 3550 9607
      3586 9451 3584 9451 3567 9448 3542 9476
      3513 9593 3515 9599 3529 9598 3529 9641
      3532 9644 3546 9644 3546 9648 3543 9650
      3546 9654

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 2 HOURS 

$$

RJS

1 follow-up statement

495 
WGUS74 KTSA 280343
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
1043 PM CDT Thu May 27 2021

OKC001-021-061-091-101-107-111-121-135-280353-
/O.CAN.KTSA.FF.W.0024.000000T0000Z-210528T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adair OK-Cherokee OK-Haskell OK-McIntosh OK-Muskogee OK-Okfuskee OK-
Okmulgee OK-Pittsburg OK-Sequoyah OK-
1043 PM CDT Thu May 27 2021

...FLASH FLOOD WARNING FOR SOUTHEASTERN CHEROKEE, SOUTHERN MUSKOGEE, 
SOUTHERN OKFUSKEE, NORTHWESTERN SEQUOYAH, SOUTHERN ADAIR, SOUTHERN 
OKMULGEE, NORTHERN HASKELL, MCINTOSH AND NORTHWESTERN PITTSBURG 
COUNTIES HAS BEEN REPLACED WITH A FLOOD WARNING...

Light rain will be ending across the area over the couple of hours. 
However, the potential for flooding will continue through the 
overnight hours.

LAT...LON 3544 9657 3540 9654 3547 9661 3550 9607
      3586 9451 3584 9451 3567 9448 3542 9476
      3513 9593 3515 9599 3529 9598 3529 9641
      3532 9644 3546 9644 3546 9648 3543 9650
      3546 9654

$$

RJS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:07 PM CDT	Tornado Warning	TSA	McIntosh	28 min
May 27, 7:27 PM CDT	Areal Flood Warning	TSA	Ottawa	12 hr
May 27, 7:30 PM CDT	Special Weather Statement	TSA	Muskogee	30 min
May 27, 7:32 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, McIntosh, Muskogee, Pittsburg	43 min
May 27, 7:33 PM CDT	Areal Flood Warning	TSA	Osage, Pawnee, Rogers, Tulsa, Washington	11 hr
May 27, 7:49 PM CDT	Special Weather Statement	TSA	Sequoyah	26 min
May 27, 7:53 PM CDT	Special Weather Statement	TSA	Sequoyah	37 min
May 27, 7:54 PM CDT	River Flood Warning	TSA	Osage	19 hr
May 27, 7:55 PM CDT	River Flood Warning	TSA	Osage, Tulsa	31 hr
May 27, 7:56 PM CDT	River Flood Warning	TSA	Tulsa	44 hr
May 27, 7:58 PM CDT	River Flood Warning	TSA	Rogers, Tulsa	36 hr
May 27, 8:01 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg	44 min
May 27, 8:03 PM CDT	Special Weather Statement	TSA	Latimer	27 min
May 27, 8:04 PM CDT	River Flood Advisory	TSA	Cherokee	49 hr
May 27, 8:24 PM CDT	Special Weather Statement	TSA	Latimer	36 min
May 27, 8:36 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore	39 min
May 27, 8:47 PM CDT	Flash Flood Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg, Pushmataha, Sequoyah	2 hr
May 27, 8:51 PM CDT	Areal Flood Warning	TSA	Creek, Okfuskee, Okmulgee	10 hr
May 27, 8:52 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	53 min
May 27, 8:54 PM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Muskogee, Okmulgee, Wagoner	10 hr
May 27, 10:00 PM CDT	Flash Flood Warning	TSA	LeFlore	3 hr
May 27, 10:43 PM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Haskell, McIntosh, Muskogee, Okfuskee and 3 more	8 hr
May 27, 10:47 PM CDT	Areal Flood Warning	TSA	Haskell, Latimer, LeFlore, Pittsburg, Pushmataha, Sequoyah	8 hr
May 28, 9:14 AM CDT	River Flood Warning	TSA	LeFlore	18 hr
May 28, 9:14 AM CDT	River Flood Advisory	TSA	Sequoyah	3 hr

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.