Alert archive / Oklahoma / Flash Flood Warnings in 2018

Flash Flood Warning 13, NWS Norman, OK

May 19, 2018Cotton County, Oklahoma; Wichita County, Texas

NWS Norman, OK issued this flash flood warning at May 19, 2018, 10:03 PM CDT for Cotton County, Oklahoma; Wichita County, Texas. 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: May 19, 2018, 10:03 PM CDT (03:03 UTC)
Expired: May 20, 2018, 1:00 AM CDT
In force: 3 hr
Issued by: NWS Norman, OK
Area: Storm-based polygon
Flood severity: None

Counties Cotton County, OK, Wichita County, TX

The radar

The Altus AFB radar (KFDR), 38 km from the middle of the area, began a volume at 03:07 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

Norman, OK (KOUN), launched 00:00Z, 3.1 hours before the alert went out and 167 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: 1717 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1316 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.0

Open this sounding in Storm Lab

The text

As transmitted.

811 
WGUS54 KOUN 200303
FFWOUN
OKC033-TXC485-200600-
/O.NEW.KOUN.FF.W.0013.180520T0303Z-180520T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
1003 PM CDT SAT MAY 19 2018

The National Weather Service in Norman has issued a

* Flash Flood Warning for...
  Southwestern Cotton County in southwestern Oklahoma...
  Central Wichita County in northern Texas...

* Until 100 AM CDT
  
* At 1002 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have 
  already fallen and an additional one to two inches of rainfall is 
  possible. Flash flooding is occurring or is imminent.

* Some locations that will experience flooding include...
  Burkburnett, Randlett and Devol. 

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 3411 9880 3413 9874 3414 9873 3413 9869
      3417 9864 3416 9861 3418 9861 3423 9847
      3413 9843 3396 9879

$$

30

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 7:09 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	51 min
May 19, 7:20 PM CDT	Special Weather Statement	OUN	Alfalfa	25 min
May 19, 7:23 PM CDT	Severe Thunderstorm Warning	OUN	Woods	37 min
May 19, 7:27 PM CDT	Severe Thunderstorm Warning	OUN	Major	48 min
May 19, 7:30 PM CDT	Special Weather Statement	OUN	Kiowa	30 min
May 19, 7:52 PM CDT	Severe Thunderstorm Warning	OUN	Woods	23 min
May 19, 7:54 PM CDT	Severe Thunderstorm Warning	OUN	Major	22 min
May 19, 8:01 PM CDT	Special Weather Statement	OUN	Caddo	29 min
May 19, 8:15 PM CDT	Special Weather Statement	OUN	Woods	15 min
May 19, 8:21 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	39 min
May 19, 8:34 PM CDT	Special Weather Statement	OUN	Caddo	26 min
May 19, 8:55 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	50 min
May 19, 9:15 PM CDT	Areal Flood Warning	OUN	Harmon, Jackson	3 hr
May 19, 9:24 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	51 min
May 19, 9:32 PM CDT	Areal Flood Advisory	OUN	Cotton, Tillman	3 hr
May 19, 9:39 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	51 min
May 19, 9:46 PM CDT	Special Weather Statement	OUN	Harper	29 min
May 19, 10:08 PM CDT	Severe Thunderstorm Warning	OUN	Cotton	52 min
May 19, 10:08 PM CDT	Severe Thunderstorm Warning	OUN	Kay, Noble	52 min
May 19, 10:10 PM CDT	Special Weather Statement	OUN	Canadian	35 min
May 19, 10:24 PM CDT	Special Weather Statement	OUN	Woodward	36 min
May 19, 10:56 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson	29 min
May 19, 11:02 PM CDT	Special Weather Statement	OUN	Woodward	28 min
May 19, 11:04 PM CDT	Special Weather Statement	OUN	Stephens	26 min
May 19, 11:18 PM CDT	Special Weather Statement	OUN	Ellis	27 min
May 19, 11:30 PM CDT	Special Weather Statement	OUN	Jefferson, Stephens	30 min
May 19, 11:45 PM CDT	Special Weather Statement	OUN	Cotton	30 min
May 19, 11:49 PM CDT	Special Weather Statement	OUN	Caddo, Grady	26 min
May 19, 11:51 PM CDT	Special Weather Statement	OUN	Garvin	24 min
May 19, 11:58 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain, Stephens	47 min
May 20, 12:05 AM CDT	Special Weather Statement	OUN	Stephens	25 min
May 20, 12:14 AM CDT	Severe Thunderstorm Warning	OUN	Cotton, Stephens	36 min
May 20, 12:22 AM CDT	Flash Flood Warning	OUN	Cotton	3 hr
May 20, 12:26 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Pottawatomie	49 min
May 20, 12:53 AM CDT	Areal Flood Warning	OUN	Cotton, Tillman	3 hr
May 20, 1:07 AM CDT	Special Weather Statement	OUN	Kay	23 min
May 20, 1:12 AM CDT	Special Weather Statement	OUN	Coal	33 min
May 20, 1:16 AM CDT	Areal Flood Advisory	OUN	Stephens	3 hr
May 20, 1:40 AM CDT	Special Weather Statement	OUN	Hughes	35 min
May 20, 1:52 AM CDT	Special Weather Statement	OUN	Garvin	38 min
May 20, 6:18 AM CDT	River Flood Warning	OUN	Cotton	19 hr
May 20, 6:21 AM CDT	Special Weather Statement	OUN	Pontotoc	24 min
May 19, 7:04 PM CDT	Areal Flood Advisory	OUN	Foard, Hardeman, Knox	3 hr
May 19, 7:20 PM CDT	Flash Flood Warning	OUN	Foard, Knox	3 hr
May 19, 7:42 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Knox	48 min
May 19, 7:45 PM CDT	Severe Thunderstorm Warning	OUN	Wichita, Wilbarger	45 min
May 19, 8:27 PM CDT	Special Weather Statement	OUN	Foard	33 min
May 19, 8:31 PM CDT	Areal Flood Advisory	OUN	Foard, Hardeman	3 hr
May 19, 8:44 PM CDT	Flash Flood Warning	OUN	Foard, Hardeman	3 hr
May 19, 8:50 PM CDT	Special Weather Statement	OUN	Wilbarger	25 min
May 19, 8:52 PM CDT	Special Weather Statement	OUN	Wichita	23 min
May 19, 8:58 PM CDT	Areal Flood Advisory	OUN	Wichita, Wilbarger	3 hr
May 19, 9:02 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Wilbarger	43 min
May 19, 9:06 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Wichita, Wilbarger	39 min
May 19, 9:13 PM CDT	Severe Thunderstorm Warning	OUN	Foard	47 min
May 19, 9:26 PM CDT	Flash Flood Warning	OUN	Foard	3 hr
May 19, 9:40 PM CDT	Severe Thunderstorm Warning	OUN	Wichita	50 min
May 19, 9:59 PM CDT	Special Weather Statement	OUN	Foard	31 min
May 19, 10:14 PM CDT	Areal Flood Warning	OUN	Foard, Knox	3 hr
May 19, 10:23 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman, Wilbarger	52 min
May 19, 10:56 PM CDT	Areal Flood Advisory	OUN	Wilbarger	3 hr
May 19, 11:06 PM CDT	Special Weather Statement	OUN	Foard	24 min
May 19, 11:09 PM CDT	Special Weather Statement	OUN	Wilbarger	36 min
May 19, 11:24 PM CDT	Special Weather Statement	OUN	Wichita	36 min
May 19, 11:27 PM CDT	Special Weather Statement	OUN	Foard	33 min
May 19, 11:33 PM CDT	Flash Flood Warning	OUN	Wichita, Wilbarger	3 hr
May 19, 11:42 PM CDT	Areal Flood Warning	OUN	Foard, Hardeman	3 hr
May 20, 12:19 AM CDT	Areal Flood Warning	OUN	Foard	3 hr
May 20, 12:52 AM CDT	Special Weather Statement	OUN	Clay	23 min
May 20, 1:18 AM CDT	Areal Flood Advisory	OUN	Baylor, Knox	3 hr
May 20, 4:35 PM CDT	River Flood Warning	OUN	Wichita, Wilbarger	16 hr

Nearby

Flash Flood Warnings in Oklahoma, 2018 Flash Flood Warnings in Texas, 2018 Every flash flood warning in 2018

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.