Alert archive / Arkansas / Flash Flood Warnings in 2019

Flash Flood Warning 101, NWS Tulsa, OK

August 27, 2019Crawford County, Franklin County, Sebastian County, Arkansas

NWS Tulsa, OK issued this flash flood warning at Aug 27, 2019, 1:39 AM CDT for Crawford County, Franklin County, Sebastian 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
Aug 27, 2019, 1:39 AM CDT (06:39 UTC)
Expired
Aug 27, 2019, 4:45 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, Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 42 km from the middle of the area, began a volume at 06:42 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, 6.7 hours before the alert went out and 175 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-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2019-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 958 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2019-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 193 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
958 J/kg
Mixed-layer CIN
-261 J/kg
Mixed-layer LCL
1510 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
193 m²/s²
0-3 km storm-relative helicity
453 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

372 
WGUS54 KTSA 270639
FFWTSA
ARC033-047-131-270945-
/O.NEW.KTSA.FF.W.0101.190827T0639Z-190827T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
139 AM CDT Tue Aug 27 2019

The National Weather Service in Tulsa has issued a

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

* Until 445 AM CDT.

* At 139 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 1 to 2 inches of rain have 
  fallen. Flash flooding is expected to begin shortly.

* Some locations that may experience flooding include...
  Ozark...                          Charleston...
  Mulberry...                       Altus...
  Branch...                         Denning...
  Wiederkehr Village...             Washburn...
  Fort Chaffee...                   Etna...
  Alix...                           Watalula...
  Meg...                            Piney...
  Toney...                          Peter Pender...
  Vesta...                          Cecil...
  Lonelm...                         Ursula...

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

This includes Interstate 40 in Arkansas between mile markers 19 and
42.
 
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 3538 9371 3537 9375 3542 9380 3531 9381
      3532 9392 3523 9392 3523 9402 3514 9403
      3514 9413 3510 9414 3559 9412 3561 9370

$$
2 follow-up statements
214 
WGUS74 KTSA 270735
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
235 AM CDT Tue Aug 27 2019

ARC033-047-131-270945-
/O.CON.KTSA.FF.W.0101.000000T0000Z-190827T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin AR-Crawford AR-Sebastian AR-
235 AM CDT Tue Aug 27 2019

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 AM CDT FOR
FRANKLIN...SOUTHEASTERN CRAWFORD AND NORTHEASTERN SEBASTIAN
COUNTIES...

At 234 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain moving out of the warned area. 1 to 3 inches of rain 
have fallen. Flash flooding is likely ongoing.

Some locations that may experience flooding include...
Ozark...                          Charleston...
Mulberry...                       Altus...
Branch...                         Denning...
Wiederkehr Village...             Washburn...
Fort Chaffee...                   Etna...
Alix...                           Watalula...
Meg...                            Piney...
Toney...                          Peter Pender...
Vesta...                          Cecil...
Lonelm...                         Ursula...

Additional rainfall amounts of less than one inch are possible in
the warned area.

This includes Interstate 40 in Arkansas between mile markers 19 and
42.
 
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 3538 9371 3537 9375 3542 9380 3531 9381
      3532 9392 3523 9392 3523 9402 3514 9403
      3514 9413 3510 9414 3559 9412 3561 9370

$$
478 
WGUS74 KTSA 270937
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
437 AM CDT Tue Aug 27 2019

ARC033-047-131-270947-
/O.EXP.KTSA.FF.W.0101.000000T0000Z-190827T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin AR-Crawford AR-Sebastian AR-
437 AM CDT Tue Aug 27 2019

...THE FLASH FLOOD WARNING FOR FRANKLIN...SOUTHEASTERN CRAWFORD AND
NORTHEASTERN SEBASTIAN COUNTIES WILL EXPIRE AT 445 AM CDT...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3538 9371 3537 9375 3542 9380 3531 9381
      3532 9392 3523 9392 3523 9402 3514 9403
      3514 9413 3510 9414 3559 9412 3561 9370

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 10:27 PM CDTSevere Thunderstorm WarningTSABenton, Washington48 min
Aug 26, 11:00 PM CDTSevere Thunderstorm WarningTSABenton, Carroll, Crawford, Franklin, Madison, Washington45 min
Aug 26, 11:34 PM CDTSevere Thunderstorm WarningTSACarroll, Crawford, Franklin, Madison, Washington41 min
Aug 27, 12:44 AM CDTSevere Thunderstorm WarningTSACrawford, Sebastian46 min
Aug 27, 1:11 AM CDTFlash Flood WarningTSACrawford, Sebastian3 hr
Aug 27, 1:23 AM CDTSevere Thunderstorm WarningTSACrawford, Franklin, Sebastian52 min
Aug 27, 2:10 AM CDTAreal Flood AdvisoryTSASebastian3 hr

Nearby

Flash Flood Warnings in Arkansas, 2019Every flash flood warning in 2019

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.