Alert archive / Arkansas / Flash Flood Warnings in 2021

Flash Flood Warning 53, NWS Tulsa, OK

July 18, 2021Crawford County, Franklin County, Washington County, Arkansas

NWS Tulsa, OK issued this flash flood warning at Jul 18, 2021, 1:09 AM CDT for Crawford County, Franklin County, Washington County, Arkansas. 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, 1:09 AM CDT (06:09 UTC)
Expired: Jul 18, 2021, 4:15 AM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Crawford County, AR, Franklin County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 61 km from the middle of the area, began a volume at 06:10 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, 6.2 hours before the alert went out and 125 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.

072 
WGUS54 KTSA 180609
FFWTSA
ARC033-047-143-180915-
/O.NEW.KTSA.FF.W.0053.210718T0609Z-210718T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Northeastern Crawford County in northwestern Arkansas...
  Southeastern Washington County in northwestern Arkansas...
  Northwestern Franklin County in west central Arkansas...

* Until 415 AM CDT.

* At 109 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 5 inches of 
  rain have fallen. Additional rainfall amounts of 0.5 to 2 inches 
  are possible in the warned area. Flash flooding is ongoing or 
  expected to begin shortly. Rainfall rates of 1 to 2 inches per 
  hour will be common across the warned area with brief rates of 3 
  inches per hour possible. These rates on top of the rainfall 
  received yesterday afternoon will result in flash flooding.

  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...
  West Fork...                       Winslow...
  Brentwood...                       Blackburn...
  Fern...                            Mount Gayler...
  Wyola...                           Locke...
  Woolsey...                         Bidville...

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 3588 9427 3593 9426 3596 9419 3594 9413
      3583 9401 3576 9396 3571 9392 3562 9398
      3564 9407 3571 9422

FLASH FLOOD...RADAR INDICATED

$$

Snider

2 follow-up statements

932 
WGUS74 KTSA 180729
FFSTSA

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

ARC033-047-143-180915-
/O.CON.KTSA.FF.W.0053.000000T0000Z-210718T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Crawford AR-Franklin AR-Washington AR-
229 AM CDT Sun Jul 18 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM CDT EARLY THIS 
MORNING FOR NORTHEASTERN CRAWFORD, SOUTHEASTERN WASHINGTON AR AND 
NORTHWESTERN FRANKLIN COUNTIES...

At 229 AM CDT, The heaviest thunderstorms have moved out of the 
warning area but an area of light rain continues. Between 1.5 and 5 
inches of rain have fallen over the past few hours. Additional 
rainfall amounts up to 0.5 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...
  West Fork...                       Winslow...
Brentwood...                       Blackburn...
Fern...                            Mount Gayler...
Wyola...                           Locke...
Woolsey...                         Bidville...

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 3588 9427 3593 9426 3596 9419 3594 9413
      3583 9401 3576 9396 3571 9392 3562 9398
      3564 9407 3571 9422

FLASH FLOOD...RADAR INDICATED

$$

Snider

514 
WGUS74 KTSA 180913
FFSTSA

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

ARC033-047-143-180923-
/O.EXP.KTSA.FF.W.0053.000000T0000Z-210718T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Crawford AR-Franklin AR-Washington AR-
413 AM CDT Sun Jul 18 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 415 AM CDT EARLY THIS MORNING 
FOR NORTHEASTERN CRAWFORD, SOUTHEASTERN WASHINGTON AR AND 
NORTHWESTERN FRANKLIN COUNTIES...

The heavy rain has ended. 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 Sunday for 
portions of Arkansas and Oklahoma.

LAT...LON 3588 9427 3593 9426 3596 9419 3594 9413
      3583 9401 3576 9396 3571 9392 3562 9398
      3564 9407 3571 9422

$$

Snider

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, 1:50 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, 5:24 AM CDT	Flash Flood Warning	TSA	Crawford, Sebastian	3 hr
Jul 18, 7:17 AM CDT	Areal Flood Warning	TSA	Franklin	6 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.