Alert archive / Oklahoma / Flash Flood Warnings in 2021

Flash Flood Warning 2, NWS Tulsa, OK

April 28, 2021Adair County, Cherokee County, Oklahoma; Benton County, Washington County, Arkansas

NWS Tulsa, OK issued this flash flood warning at Apr 28, 2021, 7:52 AM CDT for Adair County, Cherokee County, Oklahoma; Benton County, Washington County, Arkansas. It was in force for 5 hr. 10 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: Apr 28, 2021, 7:52 AM CDT (12:52 UTC)
Expired: Apr 28, 2021, 12:45 PM CDT
In force: 5 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Benton County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK

The radar

The Tulsa radar (KINX), 87 km from the middle of the area, began a volume at 12:51 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
Apr 28, 8:00 AM CDT	FLASH FLOOD	2 Ene Lake Francis, AR	TWITTER REPORT OF PARTS OF HIGHWAY 16 NEAR THE ILLINOIS RIVER IMPASSABLE DUE TO FLOOD WATERS AND DEBRIS.
Apr 28, 8:20 AM CDT	FLASH FLOOD	Elm Springs, AR	REPORTS OF WATER COVERING ROADWAYS. A SCHOOL BUS STOPPED ON THE SIDE OF THE ROAD TO AVOID A FLOODED ROADWAY. REPORT OF FIREFIGHTERS RESPONDING TO ANOTHER VEHICLE CAUGHT IN FLOOD WATERS. REPORTS RELAYED VIA TWITTER.
Apr 28, 8:30 AM CDT	FLASH FLOOD	Rogers, AR	NUMEROUS REPORTS OF WATER COVERED ROADS IN ROGERS PROPER. ONE TRAFFIC CAMERA IMAGE NEAR I-49 OF WATER COVERING THE ROADWAY BENEATH THE I-49 OVERPASS.
Apr 28, 8:35 AM CDT	FLASH FLOOD	Tontitown, AR	REPORT RELAYED VIA TWITTER OF ROADWAYS IN TOWN COVERED BY WATER.
Apr 28, 8:46 AM CDT	FLASH FLOOD	3 Ssw Bentonville, AR	STREETS FLOODED, CARS STRANDED. REPORTED 6.44 INCHES OF RAIN IN 2 HOURS.
Apr 28, 9:16 AM CDT	FLASH FLOOD	Bentonville, AR	SCHOOL BUS OFF THE ROAD DUE TO FLOODING AT EAST BATTLEFIELD ROAD OFF CENTRAL AVENUE. DRIVER/PASSENGERS SAFE. PHOTO/REPORTS RECEIVED VIA TWITTER.
Apr 28, 9:38 AM CDT	FLASH FLOOD	Siloam Springs, AR	MAIN ST. EAST OF HICO ST. WAS FLOODED IN SILOAM SPRINGS. REPORT RELAYED THROUGH SOCIAL MEDIA.
Apr 28, 9:40 AM CDT	FLASH FLOOD	Garfield, AR	HWY 127 IN GARFIELD IS CLOSE DUE TO WATER OVER ROADWAY.
Apr 28, 10:00 AM CDT	FLASH FLOOD	Cave Springs, AR	SECTONS OF HWY 264 CLSOED DUE TO WATER OVER ROADS BETWEEN CAVE SPRINGS AND NORTHWEST ARKANSAS REGIONAL AIRPORT.
Apr 28, 11:00 AM CDT	FLASH FLOOD	Cave Springs, AR	SECTIONS OF HWY 264 ARE CLOSED DUE TO ROAD WASHOUT BETWEEN CAVE SPRINGS AND LOWELL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 0.9 hours before the alert went out and 116 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: 34 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1441 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

439 
WGUS54 KTSA 281252
FFWTSA
ARC007-143-OKC001-021-281745-
/O.NEW.KTSA.FF.W.0002.210428T1252Z-210428T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
752 AM CDT Wed Apr 28 2021

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Benton County in northwestern Arkansas...
  Northwestern Washington AR County in northwestern Arkansas...
  Southeastern Cherokee County in east central Oklahoma...
  Adair County in northeastern Oklahoma...

* Until 1245 PM CDT.

* At 752 AM CDT, Doppler radar and automated rain gauges 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...Doppler radar and automated gauges.

  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...
  Springdale...                      Rogers...
  Bentonville...                     Tahlequah...
  Siloam Springs...                  Stilwell...
  Bella Vista...                     Lowell...
  Pea Ridge...                       Gentry...
  Tontitown...                       Bethel Heights...
  Lincoln...                         Cave Springs...
  Decatur...                         Westville...
  Highfill...                        Gateway...
  Watts...                           Springtown...

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3581 9513 3615 9464 3615 9456 3622 9457
      3649 9433 3650 9387 3639 9387 3564 9482
      3564 9513

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

1 follow-up statement

015 
WGUS74 KTSA 281323
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
823 AM CDT Wed Apr 28 2021

ARC007-143-OKC001-021-281745-
/O.CON.KTSA.FF.W.0002.000000T0000Z-210428T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Benton AR-Washington AR-Adair OK-Cherokee OK-
823 AM CDT Wed Apr 28 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 PM CDT THIS 
AFTERNOON FOR BENTON, NORTHWESTERN WASHINGTON AR, SOUTHEASTERN 
CHEROKEE AND ADAIR COUNTIES...

At 823 AM CDT, Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain across the warned area. Between 1 
and 3 inches of rain have fallen. Rainfall rates of 2 to 3 inches 
per hour have been measured. Flash flooding is ongoing.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Doppler radar and automated gauges.

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...
  Springdale...                      Rogers...
Bentonville...                     Tahlequah...
Siloam Springs...                  Stilwell...
Bella Vista...                     Lowell...
Pea Ridge...                       Gentry...
Tontitown...                       Bethel Heights...
Lincoln...                         Cave Springs...
Decatur...                         Westville...
Highfill...                        Gateway...
Watts...                           Springtown...

Additional rainfall amounts of 1 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3581 9513 3615 9464 3615 9456 3622 9457
      3649 9433 3650 9387 3639 9387 3564 9482
      3564 9513

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 1:54 AM CDT	Special Weather Statement	TSA	Craig, Osage, Rogers, Washington	21 min
Apr 28, 2:16 AM CDT	Special Weather Statement	TSA	Craig	29 min
Apr 28, 2:20 AM CDT	Tornado Warning	TSA	Okfuskee, Okmulgee	40 min
Apr 28, 2:57 AM CDT	Tornado Warning	TSA	Muskogee, Okmulgee	15 min
Apr 28, 5:12 AM CDT	Special Weather Statement	TSA	Adair	33 min
Apr 28, 5:19 AM CDT	Special Weather Statement	TSA	Okmulgee	26 min
Apr 28, 5:22 AM CDT	Special Weather Statement	TSA	Sequoyah	23 min
Apr 28, 5:44 AM CDT	Special Weather Statement	TSA	Okmulgee	16 min
Apr 28, 5:48 AM CDT	Special Weather Statement	TSA	Adair	27 min
Apr 28, 5:52 AM CDT	Tornado Warning	TSA	Adair	38 min
Apr 28, 5:54 AM CDT	Special Weather Statement	TSA	McIntosh	36 min
Apr 28, 6:03 AM CDT	Special Weather Statement	TSA	Sequoyah	27 min
Apr 28, 6:23 AM CDT	Special Weather Statement	TSA	McIntosh	37 min
Apr 28, 6:26 AM CDT	Tornado Warning	TSA	Adair	18 min
Apr 28, 6:45 AM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Muskogee, Sequoyah	5 hr
Apr 28, 6:53 AM CDT	Special Weather Statement	TSA	Muskogee	52 min
Apr 28, 7:43 AM CDT	Special Weather Statement	TSA	Adair, Sequoyah	47 min
Apr 28, 8:29 AM CDT	Flash Flood Warning	TSA	Adair	4 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Adair, Cherokee, Delaware	47 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Cherokee	64 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Cherokee	11 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Adair, Delaware	41 hr
Apr 28, 9:18 AM CDT	River Flood Advisory	TSA	Cherokee, Delaware	23 hr
Apr 28, 9:22 AM CDT	River Flood Warning	TSA	Creek	7 hr
Apr 28, 9:35 AM CDT	Special Weather Statement	TSA	Pittsburg	40 min
Apr 28, 9:58 AM CDT	River Flood Warning	TSA	Sequoyah	41 hr
Apr 28, 10:01 AM CDT	River Flood Warning	TSA	Okmulgee	16 hr
Apr 28, 10:14 AM CDT	Special Weather Statement	TSA	McIntosh, Pittsburg	46 min
Apr 28, 10:38 AM CDT	Areal Flood Advisory	TSA	McIntosh, Pittsburg	3 hr
Apr 28, 10:40 AM CDT	Tornado Warning	TSA	McIntosh, Pittsburg	35 min
Apr 28, 10:49 AM CDT	Flash Flood Warning	TSA	Haskell, McIntosh, Muskogee, Pittsburg, Sequoyah	4 hr
Apr 28, 11:09 AM CDT	Tornado Warning	TSA	Haskell, McIntosh, Pittsburg	31 min
Apr 28, 11:42 AM CDT	Special Weather Statement	TSA	Haskell	33 min
Apr 28, 12:32 PM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Delaware, Haskell, Latimer, McIntosh and 3 more	9 hr
Apr 28, 4:36 PM CDT	River Flood Warning	TSA	LeFlore	3 days
Apr 28, 6:47 AM CDT	Special Weather Statement	TSA	Washington	43 min
Apr 28, 7:04 AM CDT	Special Weather Statement	TSA	Benton	26 min
Apr 28, 7:20 AM CDT	Areal Flood Advisory	TSA	Benton, Washington	4 hr
Apr 28, 7:34 AM CDT	Special Weather Statement	TSA	Benton	26 min
Apr 28, 7:47 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll	43 min
Apr 28, 7:58 AM CDT	Special Weather Statement	TSA	Benton	32 min
Apr 28, 8:03 AM CDT	Tornado Warning Tornado observed	TSA	Benton	27 min
Apr 28, 8:13 AM CDT	Tornado Warning	TSA	Carroll	22 min
Apr 28, 8:16 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	44 min
Apr 28, 8:27 AM CDT	Special Weather Statement	TSA	Crawford, Washington	48 min
Apr 28, 8:40 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison, Washington	50 min
Apr 28, 9:04 AM CDT	Severe Thunderstorm Warning	TSA	Carroll	26 min
Apr 28, 9:15 AM CDT	Special Weather Statement	TSA	Crawford, Franklin, Madison	45 min
Apr 28, 9:26 AM CDT	Special Weather Statement	TSA	Carroll	19 min
Apr 28, 9:42 AM CDT	Areal Flood Advisory	TSA	Carroll, Madison, Washington	3 hr
Apr 28, 9:56 AM CDT	Special Weather Statement	TSA	Carroll, Franklin, Madison	34 min
Apr 28, 9:58 AM CDT	River Flood Warning	TSA	Crawford, Sebastian	41 hr
Apr 28, 9:58 AM CDT	River Flood Warning	TSA	Franklin, Johnson, Logan	70 hr
Apr 28, 10:34 AM CDT	Special Weather Statement	TSA	Franklin	41 min
Apr 28, 11:34 AM CDT	Areal Flood Advisory	TSA	Crawford, Franklin	3 hr
Apr 28, 11:52 AM CDT	Flash Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Washington	8 hr
Apr 28, 4:42 PM CDT	River Flood Advisory	TSA	Crawford, Franklin	19 hr

Nearby

Flash Flood Warnings in Oklahoma, 2021 Flash Flood Warnings in Arkansas, 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.