Alert archive / Oklahoma / Flash Flood Warnings in 2021

Flash Flood Warning 44, NWS Tulsa, OK

July 10, 2021Nowata County, Osage County, Washington County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Jul 10, 2021, 5:41 PM CDT for Nowata County, Osage County, Washington County, Oklahoma. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 10, 2021, 5:41 PM CDT (22:41 UTC)
Expired: Jul 10, 2021, 8:45 PM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Nowata County, OK, Osage County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 70 km from the middle of the area, began a volume at 22:40 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.7 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: 917 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 703 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 125 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

158 
WGUS54 KTSA 102241
FFWTSA
OKC105-113-147-110145-
/O.NEW.KTSA.FF.W.0044.210710T2241Z-210711T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
541 PM CDT Sat Jul 10 2021

The National Weather Service in Tulsa has issued a

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

* Until 845 PM CDT.

* At 541 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Bartlesville...                    Nowata...
  Dewey...                           Delaware...
  Bartlesville Municipal Airport...  Sunset Lake...
  Bigheart...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3691 9619 3688 9600 3679 9544 3670 9543
      3667 9543 3666 9543 3670 9581 3671 9601
      3677 9630

FLASH FLOOD...RADAR INDICATED

$$

RJS

1 follow-up statement

471 
WGUS74 KTSA 110138
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
838 PM CDT Sat Jul 10 2021

OKC105-113-147-110148-
/O.EXP.KTSA.FF.W.0044.000000T0000Z-210711T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Nowata OK-Osage OK-Washington OK-
838 PM CDT Sat Jul 10 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 845 PM CDT THIS EVENING FOR 
CENTRAL NOWATA, NORTHEASTERN OSAGE AND CENTRAL WASHINGTON OK 
COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3691 9619 3688 9600 3679 9544 3670 9543
      3667 9543 3666 9543 3670 9581 3671 9601
      3677 9630

$$

RJS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 11:00 AM CDT	Special Weather Statement	TSA	Delaware	30 min
Jul 10, 4:14 PM CDT	Severe Thunderstorm Warning	TSA	Osage	46 min
Jul 10, 4:24 PM CDT	Special Weather Statement	TSA	Washington	36 min
Jul 10, 4:43 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Washington	47 min
Jul 10, 5:09 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata, Rogers, Washington	51 min
Jul 10, 5:16 PM CDT	Areal Flood Advisory	TSA	Nowata, Osage, Washington	3 hr
Jul 10, 5:27 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Washington	48 min
Jul 10, 5:49 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Nowata, Rogers	41 min
Jul 10, 5:52 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	38 min
Jul 10, 6:06 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee, Rogers, Tulsa, Washington	39 min
Jul 10, 6:19 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Rogers, Wagoner	41 min
Jul 10, 6:24 PM CDT	Special Weather Statement	TSA	Pawnee	36 min
Jul 10, 6:34 PM CDT	Areal Flood Advisory	TSA	Nowata, Osage, Pawnee, Rogers, Tulsa, Washington	3 hr
Jul 10, 6:40 PM CDT	Special Weather Statement	TSA	Pawnee, Tulsa	50 min
Jul 10, 6:43 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Delaware, Mayes, Wagoner	47 min
Jul 10, 6:47 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Osage, Rogers, Tulsa, Wagoner, Washington	43 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.