Alert archive / Arkansas / Flash Flood Warnings in 2017

Flash Flood Warning 19, NWS Tulsa, OK

April 29, 2017Carroll County, Arkansas

NWS Tulsa, OK issued this flash flood warning at Apr 29, 2017, 9:36 PM CDT for Carroll County, Arkansas. It was in force for 12 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: Apr 29, 2017, 9:36 PM CDT (02:36 UTC)
Expired: Apr 30, 2017, 9:30 AM CDT
In force: 12 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

County Carroll County, AR

The radar

The Springfield radar (KSGF), 94 km from the middle of the area, began a volume at 02:39 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

Topeka, KS (KFOE), launched 00:00Z, 2.6 hours before the alert went out and 327 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: 105 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 440 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 429 m²/s²
0-3 km storm-relative helicity: 415 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

485 
WGUS54 KTSA 300236
FFWTSA
ARC015-301430-
/O.NEW.KTSA.FF.W.0019.170430T0236Z-170430T1430Z/
/00000.0.DR.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
936 PM CDT SAT APR 29 2017

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  A Dam Floodgate Release in...
  Northwestern Carroll County in northwestern Arkansas...

* Until 930 AM CDT Sunday

* At 925 PM CDT, Corps of Engineers reported the floodgates on the 
  Beaver Dam were going to increase releases at 10 PM Saturday which 
  may cause flash flooding downstream on the White River.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3643 9376 3640 9383 3642 9386 3650 9384
      3650 9370

$$

jbm

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 9:29 PM CDT	Special Weather Statement	TSA	Carroll	31 min
Apr 30, 1:42 AM CDT	Special Weather Statement	TSA	Madison	33 min
Apr 30, 2:24 AM CDT	Special Weather Statement	TSA	Benton	36 min
Apr 30, 4:04 AM CDT	Areal Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Washington	60 hr
Apr 30, 4:11 AM CDT	Wind Advisory	TSA	Benton, Carroll, Madison, Washington	17 hr
Apr 30, 9:25 AM CDT	Flash Flood Warning	TSA	Carroll	26 hr
Apr 30, 3:19 PM CDT	River Flood Advisory	TSA	Crawford, Franklin	36 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.