Alert archive / Arkansas / Flash Flood Warnings in 2021

Flash Flood Warning 5, NWS Tulsa, OK

April 28, 20216 counties in Arkansas

NWS Tulsa, OK issued this flash flood warning at Apr 28, 2021, 11:52 AM CDT for 6 counties in Arkansas. It was in force for 8 hr. 1 report 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, 11:52 AM CDT (16:52 UTC)
Expired: Apr 28, 2021, 7:45 PM CDT
In force: 8 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 99 km from the middle of the area, began a volume at 16:56 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, 1:46 PM CDT	FLASH FLOOD	3 Sw Mountainburg, AR	A SECTION OF STATE HWY 282 HAS BEEN CLOSED DUE TO HIGH WATER.

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, 4.9 hours before the alert went out and 100 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.

623 
WGUS54 KTSA 281652
FFWTSA
ARC007-015-033-047-087-143-290045-
/O.NEW.KTSA.FF.W.0005.210428T1652Z-210429T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
1152 AM CDT Wed Apr 28 2021

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Benton County in northwestern Arkansas...
  Carroll County in northwestern Arkansas...
  Crawford County in northwestern Arkansas...
  Madison County in northwestern Arkansas...
  Washington AR County in northwestern Arkansas...
  Franklin County in west central Arkansas...

* Until 745 PM CDT Wednesday.

* At 1152 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 5 inches of rain 
  have fallen with localized amounts around 6 inches in the 
  Bentonville Arkansas area. Flash flooding is ongoing across much 
  of far northwest Arkansas and will likely begin shortly across 
  portions of west central Arkansas.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar and rainfall gauges 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...
  Fort Smith...                      Fayetteville...
  Springdale...                      Rogers...
  Bentonville...                     Van Buren...
  Siloam Springs...                  Berryville...
  Ozark...                           Huntsville...
  Eureka Springs...                  Cedarville...
  Mountainburg...                    Natural Dam...
  Bella Vista...                     Lowell...
  Farmington...                      Alma...
  Pea Ridge...                       Prairie Grove...

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 3650 9461 3650 9330 3611 9330 3613 9348
      3608 9348 3608 9345 3597 9345 3595 9349
      3588 9351 3588 9352 3576 9352 3577 9370
      3544 9371 3545 9444

FLASH FLOOD...RADAR INDICATED

$$

1 follow-up statement

366 
WGUS74 KTSA 290042
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
742 PM CDT Wed Apr 28 2021

ARC007-015-033-047-087-143-290052-
/O.EXP.KTSA.FF.W.0005.000000T0000Z-210429T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Benton AR-Carroll AR-Crawford AR-Franklin AR-Madison AR-Washington
AR-
742 PM CDT Wed Apr 28 2021

...FLASH FLOOD WARNING AT 745 PM CDT THIS EVENING FOR BENTON, 
CARROLL, CRAWFORD, MADISON, WASHINGTON AR AND FRANKLIN COUNTIES HAS 
BEEN REPLACED WITH A FLOOD WARNING...

LAT...LON 3650 9461 3650 9330 3611 9330 3613 9348
      3608 9348 3608 9345 3597 9345 3595 9349
      3588 9351 3588 9352 3576 9352 3577 9370
      3544 9371 3545 9444

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 6:26 AM CDT	Tornado Warning	TSA	Washington	18 min
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, 7:52 AM CDT	Flash Flood Warning	TSA	Benton, Washington	5 hr
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, 8:29 AM CDT	Flash Flood Warning	TSA	Benton, Carroll, Madison, Washington	4 hr
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	41 hr
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, 4:42 PM CDT	River Flood Advisory	TSA	Crawford, Franklin	19 hr

Nearby

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.