Alert archive / Arkansas / Flash Flood Warnings in 2017

Flash Flood Warning 4, NWS Tulsa, OK

April 26, 20176 counties in Arkansas

NWS Tulsa, OK issued this flash flood warning at Apr 26, 2017, 7:46 AM CDT for 6 counties in Arkansas. It was in force for 3 hr. 2 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 26, 2017, 7:46 AM CDT (12:46 UTC)
Expired: Apr 26, 2017, 10:45 AM CDT
In force: 3 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 12:47 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 26, 8:18 AM CDT	FLASH FLOOD	Huntsville, AR	A SECTION OF STATE HIGHWAY 23 HAS BEEN CLOSED DUE TO HIGH WATER. REPORT RECEIVED VIA ARKANSAS STATE HIGHWAY AND TRANSPORTATION DEPARTMENT TWITTER ACCOUNT. EXACT LOCATION ESTIMATED USING AHTD ROAD CONDITIONS MAP.
Apr 26, 9:55 AM CDT	FLASH FLOOD	Natural Dam, AR	NATURAL DAM ROAD IS SHUT DOWN DUE TO FLOODING. RELAYED VIA BROADCAST MEDIA SOCIAL MEDIA ACCOUNTS.

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, 0.8 hours before the alert went out and 99 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: 25 J/kg
Mixed-layer CIN: -181 J/kg
Mixed-layer LCL: 579 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 174 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

885 
WGUS54 KTSA 261246
FFWTSA
ARC007-015-033-047-087-143-261545-
/O.NEW.KTSA.FF.W.0004.170426T1246Z-170426T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
746 AM CDT WED APR 26 2017

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  East central Benton County in northwestern Arkansas...
  Madison County in northwestern Arkansas...
  Northwestern Franklin County in west central Arkansas...
  Northern Crawford County in northwestern Arkansas...
  Central Carroll County in northwestern Arkansas...
  Washington County in northwestern Arkansas...

* Until 1045 AM CDT

* At 743 AM CDT, the public reported flash flooding across the 
  warned area. 2 to 3 inches of rain has already fallen. Flash 
  flooding is already occurring.

* Some locations that may experience flooding include...
  Fayetteville...                   Springdale...
  Huntsville...                     Eureka Springs...
  Mountainburg...                   Natural Dam...
  Elkins...                         West Fork...
  Mulberry...                       Greenland...
  Dyer...                           Winslow...
  Chester...                        St. Paul...
  Hindsville...                     Wesley...
  Rudd...                           Saint Paul...
  Forum...                          Aurora...

Additional rainfall amounts up to 1 inch are possible in the warned 
area.

This includes the following highways,
 Interstate 40 in Arkansas between mile markers 18 and 29.
 Interstate 49 between mile markers 25 and 62.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

&&

LAT...LON 3612 9338 3612 9348 3608 9348 3608 9345
      3605 9345 3544 9402 3570 9449 3573 9449
      3647 9386 3620 9331

$$

1 follow-up statement

535 
WGUS74 KTSA 261539
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
1039 AM CDT WED APR 26 2017

ARC007-015-033-047-087-143-261547-
/O.EXP.KTSA.FF.W.0004.000000T0000Z-170426T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Benton AR-Madison AR-Franklin AR-Crawford AR-Carroll AR-
Washington AR-
1039 AM CDT WED APR 26 2017

...THE FLASH FLOOD WARNING FOR EAST CENTRAL BENTON...MADISON...
NORTHWESTERN FRANKLIN...NORTHERN CRAWFORD...CENTRAL CARROLL AND
WASHINGTON COUNTIES WILL EXPIRE AT 1045 AM CDT...

The heavy rain has ended...however...flooding is currently occurring 
and will continue over the next several hours. Please continue to 
heed any remaining road closures.

LAT...LON 3612 9338 3612 9348 3608 9348 3608 9345
      3605 9345 3544 9402 3570 9449 3573 9449
      3647 9386 3620 9331

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 10:35 PM CDT	Flash Flood Watch	TSA	Benton, Carroll, Madison, Washington	14 hr
Apr 26, 12:15 AM CDT	Severe Thunderstorm Warning	TSA	Benton	45 min
Apr 26, 12:39 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison, Washington	51 min
Apr 26, 12:49 AM CDT	Severe Thunderstorm Warning	TSA	Crawford, Washington	41 min
Apr 26, 1:18 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison, Washington	42 min
Apr 26, 1:45 AM CDT	Severe Thunderstorm Warning	TSA	Carroll	30 min
Apr 26, 2:19 AM CDT	Special Weather Statement	TSA	Crawford, Franklin, Madison	41 min
Apr 26, 5:57 AM CDT	Areal Flood Advisory	TSA	Benton, Carroll, Crawford, Madison, Washington	2 hr
Apr 26, 7:50 AM CDT	Severe Thunderstorm Warning	TSA	Sebastian	25 min
Apr 26, 7:51 AM CDT	Areal Flood Advisory	TSA	Crawford, Franklin, Sebastian	3 hr
Apr 26, 7:57 AM CDT	Special Weather Statement	TSA	Crawford	33 min
Apr 26, 8:14 AM CDT	Severe Thunderstorm Warning	TSA	Sebastian	31 min
Apr 26, 8:38 AM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	37 min
Apr 26, 9:05 AM CDT	River Flood Advisory	TSA	Crawford, Franklin	36 hr
Apr 26, 10:37 AM CDT	Areal Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Washington	3 hr
Apr 26, 3:00 PM CDT	River Flood Warning	TSA	Crawford, Sebastian	22 hr
Apr 26, 3:04 PM CDT	River Flood Advisory	TSA	Franklin, Johnson, Logan	52 hr
Apr 26, 5:13 PM CDT	River Flood Warning	TSA	Crawford	12 hr

Nearby

Flash Flood Warnings in Arkansas, 2017 Every flash flood warning in 2017

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.