Alert archive / Arkansas / Flash Flood Warnings in 2021

Flash Flood Warning 57, NWS Tulsa, OK

July 18, 2021Crawford County, Sebastian County, Arkansas; Sequoyah County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Jul 18, 2021, 5:24 AM CDT for Crawford County, Sebastian County, Arkansas; Sequoyah 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 18, 2021, 5:24 AM CDT (10:24 UTC)
Expired: Jul 18, 2021, 8:30 AM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Crawford County, AR, Sebastian County, AR, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 12 km from the middle of the area, began a volume at 10:27 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, 10.4 hours before the alert went out and 180 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: 346 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 826 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -60 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

674 
WGUS54 KTSA 181024
FFWTSA
ARC033-131-OKC135-181330-
/O.NEW.KTSA.FF.W.0057.210718T1024Z-210718T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
524 AM CDT Sun Jul 18 2021

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Southwestern Crawford County in northwestern Arkansas...
  Northwestern Sebastian County in west central Arkansas...
  East Central Sequoyah County in east central Oklahoma...

* Until 830 AM CDT.

* At 524 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 3 inches of 
  rain have fallen. 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...
  Fort Smith...                      Van Buren...
  Barling...                         Muldrow...
  Roland...                          Moffett...
  Fort Smith Regional Airport...     Dora...
  Mill Creek...                      Shibley...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3534 9449 3540 9460 3555 9445 3541 9422
      3526 9439 3529 9443 3538 9443 3537 9445
      3538 9447 3537 9448 3535 9448

FLASH FLOOD...RADAR INDICATED

$$

Lacy

1 follow-up statement

485 
WGUS74 KTSA 181337
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
837 AM CDT Sun Jul 18 2021

ARC033-131-OKC135-181347-
/O.EXP.KTSA.FF.W.0057.000000T0000Z-210718T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Crawford AR-Sebastian AR-Sequoyah OK-
837 AM CDT Sun Jul 18 2021

...FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHWESTERN CRAWFORD, 
NORTHWESTERN SEBASTIAN AND EAST CENTRAL SEQUOYAH COUNTIES...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

A Flash Flood Watch remains in effect until 100 PM CDT for portions 
of Arkansas and Oklahoma.

LAT...LON 3534 9449 3540 9460 3555 9445 3541 9422
      3526 9439 3529 9443 3538 9443 3537 9445
      3538 9447 3537 9448 3535 9448

$$

RBD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 7:16 PM CDT	Severe Thunderstorm Warning	TSA	Washington	44 min
Jul 17, 8:39 PM CDT	Special Weather Statement	TSA	Benton	66 min
Jul 18, 1:09 AM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Washington	3 hr
Jul 18, 1:50 AM CDT	Areal Flood Advisory	TSA	Benton	115 min
Jul 18, 2:18 AM CDT	Flash Flood Warning	TSA	Franklin	5 hr
Jul 18, 4:11 AM CDT	Special Weather Statement	TSA	Crawford	34 min
Jul 18, 4:50 AM CDT	Areal Flood Advisory	TSA	Crawford, Franklin, Sebastian	3 hr
Jul 18, 4:56 AM CDT	Special Weather Statement	TSA	Sebastian	34 min
Jul 18, 7:17 AM CDT	Areal Flood Warning	TSA	Franklin	6 hr
Jul 17, 8:05 PM CDT	Special Weather Statement	TSA	Ottawa	25 min
Jul 17, 8:50 PM CDT	Special Weather Statement	TSA	Osage	40 min
Jul 17, 9:01 PM CDT	Special Weather Statement	TSA	Wagoner	59 min
Jul 17, 9:44 PM CDT	Special Weather Statement	TSA	Rogers	61 min
Jul 17, 10:01 PM CDT	Areal Flood Advisory	TSA	Craig, Ottawa	119 min
Jul 17, 10:54 PM CDT	Areal Flood Advisory	TSA	Cherokee, Muskogee, Sequoyah	2 hr
Jul 17, 11:41 PM CDT	Flash Flood Warning Considerable damage threat	TSA	Tulsa	4 hr
Jul 18, 12:04 AM CDT	Flash Flood Warning	TSA	Muskogee	5 hr
Jul 18, 1:43 AM CDT	Areal Flood Advisory	TSA	Cherokee, Muskogee, Wagoner	2 hr
Jul 18, 2:11 AM CDT	Flash Flood Warning	TSA	Muskogee	3 hr
Jul 18, 2:23 AM CDT	Areal Flood Advisory	TSA	Tulsa	112 min
Jul 18, 2:49 AM CDT	Special Weather Statement	TSA	Muskogee	26 min
Jul 18, 3:04 AM CDT	Flash Flood Warning	TSA	Muskogee, Wagoner	2 hr
Jul 18, 3:15 AM CDT	Special Weather Statement	TSA	Muskogee	30 min
Jul 18, 3:45 AM CDT	Areal Flood Warning	TSA	Tulsa	3 hr
Jul 18, 5:14 AM CDT	Areal Flood Warning	TSA	Cherokee, Muskogee, Wagoner	3 hr
Jul 18, 5:25 AM CDT	Areal Flood Warning	TSA	Muskogee, Wagoner	50 min
Jul 18, 8:52 AM CDT	River Flood Advisory	TSA	Cherokee	36 hr

Nearby

Flash Flood Warnings in Arkansas, 2021 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.