Alert archive / Arkansas / Flash Flood Warnings in 2021

Flash Flood Warning 64, NWS Tulsa, OK

December 17, 2021Benton County, Carroll County, Arkansas

NWS Tulsa, OK issued this flash flood warning at Dec 17, 2021, 3:52 PM CST for Benton County, Carroll County, Arkansas. It was in force for 5 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: Dec 17, 2021, 3:52 PM CST (21:52 UTC)
Expired: Dec 17, 2021, 8:45 PM CST
In force: 5 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Benton County, AR, Carroll County, AR

The radar

The Western Arkansas radar (KSRX), 107 km from the middle of the area, began a volume at 21:55 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, 9.9 hours before the alert went out and 85 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1332 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 638 m²/s²
0-3 km storm-relative helicity: 713 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

074 
WGUS54 KTSA 172152
FFWTSA
ARC007-015-180045-
/O.NEW.KTSA.FF.W.0064.211217T2152Z-211218T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
352 PM CST Fri Dec 17 2021

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Benton County in northwestern Arkansas...
  Northwestern Carroll County in northwestern Arkansas...

* Until 645 PM CST.

* At 352 PM CST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 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...
  Springdale...                      Rogers...
  Bentonville...                     Siloam Springs...
  Eureka Springs...                  Bella Vista...
  Lowell...                          Pea Ridge...
  Gentry...                          Bethel Heights...
  Gravette...                        Cave Springs...
  Decatur...                         Highfill...
  Gateway...                         Beaver...
  Springtown...                      Northwest Arkansas Regional 
  Airport...
  Hiwasse...                         Miller...

This includes the following highways...
	Interstate 49 between mile markers 75 and 93.

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 3610 9451 3643 9457 3650 9440 3650 9370
      3643 9370 3621 9419 3621 9433 3615 9434
      3614 9439 3612 9439 3610 9444

FLASH FLOOD...RADAR INDICATED

$$

KAH

2 follow-up statements

618 
WGUS54 KTSA 180029
FFWTSA
ARC007-015-180245-
/O.EXT.KTSA.FF.W.0064.000000T0000Z-211218T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
629 PM CST Fri Dec 17 2021

The National Weather Service in Tulsa has extended the

* Flash Flood Warning for...
  Benton County in northwestern Arkansas...
  Northwestern Carroll County in northwestern Arkansas...

* Until 845 PM CST.

* At 629 PM CST, 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...
  Springdale...                      Rogers...
  Bentonville...                     Siloam Springs...
  Eureka Springs...                  Bella Vista...
  Lowell...                          Pea Ridge...
  Gentry...                          Bethel Heights...
  Gravette...                        Cave Springs...
  Decatur...                         Highfill...
  Gateway...                         Beaver...
  Springtown...                      Northwest Arkansas Regional 
  Airport...
  Hiwasse...                         Miller...

This includes the following highways...
	Interstate 49 between mile markers 75 and 93.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 3610 9451 3643 9457 3650 9440 3650 9370
      3643 9370 3621 9419 3621 9433 3615 9434
      3614 9439 3612 9439 3610 9444

FLASH FLOOD...RADAR INDICATED

$$

KAH

421 
WGUS74 KTSA 180247
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
847 PM CST Fri Dec 17 2021

ARC007-015-180257-
/O.EXP.KTSA.FF.W.0064.000000T0000Z-211218T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Benton AR-Carroll AR-
847 PM CST Fri Dec 17 2021

...FLASH FLOOD WARNING HAS EXPIRED FOR BENTON AND NORTHWESTERN 
CARROLL COUNTIES...

The heavy rain has ended. Light to moderate rain will continue for 
the next few hours, but flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flood Watch remains in effect until 6 AM CST Saturday for portions 
of Arkansas and Oklahoma.

LAT...LON 3610 9451 3643 9457 3650 9440 3650 9370
      3643 9370 3621 9419 3621 9433 3615 9434
      3614 9439 3612 9439 3610 9444

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 17, 7:57 AM CST	Areal Flood Advisory	TSA	Crawford, Washington	2 hr
Dec 17, 12:18 PM CST	Areal Flood Advisory	TSA	Benton, Carroll, Madison, Washington	4 hr
Dec 17, 2:54 PM CST	Areal Flood Advisory	TSA	Benton, Carroll	58 min
Dec 17, 4:43 PM CST	Flash Flood Warning	TSA	Benton, Carroll, Madison, Washington	4 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.