Alert archive / Oklahoma / Flash Flood Warnings in 2021

Flash Flood Warning 16, NWS Tulsa, OK

May 25, 2021LeFlore County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 25, 2021, 7:03 PM CDT for LeFlore 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: May 25, 2021, 7:03 PM CDT (00:03 UTC)
Expired: May 25, 2021, 10:00 PM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

County LeFlore County, OK

The radar

The Western Arkansas radar (KSRX), 65 km from the middle of the area, began a volume at 00:03 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 00:00Z, 0.1 hours before the alert went out and 251 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: 102 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 511 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

342 
WGUS54 KTSA 260003
FFWTSA
OKC079-260300-
/O.NEW.KTSA.FF.W.0016.210526T0003Z-210526T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
703 PM CDT Tue May 25 2021

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Southeastern Le Flore County in southeastern Oklahoma...

* Until 1000 PM CDT.

* At 703 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 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...
  Poteau...                          Heavener...
  Howe...                            Heavener Runestone State Park...
  Big Cedar...                       Octavia...
  Hodgen...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3451 9446 3452 9471 3504 9470 3506 9444

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.75-1.5 INCHES IN 1 HOUR 

$$

RJS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 12:42 AM CDT	River Flood Warning	TSA	LeFlore	20 hr
May 26, 12:43 AM CDT	River Flood Warning	TSA	LeFlore	44 hr
May 26, 5:24 AM CDT	Dense Fog Advisory	TSA	Craig, Creek, Haskell, McIntosh, Mayes, Muskogee and 8 more	4 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.