Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 7, NWS Amarillo, TX

May 31, 2021Collingsworth County, Donley County, Texas

NWS Amarillo, TX issued this flash flood warning at May 31, 2021, 2:27 AM CDT for Collingsworth County, Donley County, Texas. It was in force for 3 hr. 1 report 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: May 31, 2021, 2:27 AM CDT (07:27 UTC)
Expired: May 31, 2021, 5:30 AM CDT
In force: 3 hr
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Flood severity: None

Counties Collingsworth County, TX, Donley County, TX

The radar

The Amarillo radar (KAMA), 122 km from the middle of the area, began a volume at 07:28 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
May 31, 2:52 AM CDT	FLASH FLOOD	Wellington, TX	NUMEROUS ROADWAYS IN WELLINGTON FLOODED WITH SOME ROADS IMPASSABLE DUE TO FAST FLOWING WATER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 7.5 hours before the alert went out and 121 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: 436 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1025 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted.

397 
WGUS54 KAMA 310727
FFWAMA
TXC087-129-311030-
/O.NEW.KAMA.FF.W.0007.210531T0727Z-210531T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Amarillo TX
227 AM CDT Mon May 31 2021

The National Weather Service in Amarillo has issued a

* Flash Flood Warning for...
  Collingsworth County in the panhandle of Texas...
  Southeastern Donley County in the panhandle of Texas...

* Until 530 AM CDT.

* At 227 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 3 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...
  Wellington, Hedley, Dodson, Quail and Lutie.

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 3477 10070 3481 10074 3487 10073 3492 10069
      3498 10045 3497 10038 3497 10030 3511 10015
      3512 10009 3508 10000 3475 10000 3475 10064

FLASH FLOOD...RADAR INDICATED

$$

Ferguson

1 follow-up statement

217 
WGUS74 KAMA 310755
FFSAMA

Flash Flood Statement
National Weather Service Amarillo TX
255 AM CDT Mon May 31 2021

TXC087-129-311030-
/O.CON.KAMA.FF.W.0007.000000T0000Z-210531T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Collingsworth TX-Donley TX-
255 AM CDT Mon May 31 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 AM CDT EARLY THIS 
MORNING FOR COLLINGSWORTH AND SOUTHEASTERN DONLEY COUNTIES...

At 255 AM CDT, law enforcement reported that multiple roadways were 
impassable in the city of Wellington due to flooding. Between 2 and 
4 inches of rain have fallen. Additional rainfall amounts of 1 to 3 
inches are possible in the warned area. Flash flooding is ongoing.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Law enforcement reported.

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...
  Wellington, Hedley, Dodson, Quail and Lutie.

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 3477 10070 3481 10074 3487 10073 3492 10069
      3498 10045 3497 10038 3497 10030 3511 10015
      3512 10009 3508 10000 3475 10000 3475 10064

FLASH FLOOD...OBSERVED

$$

Ferguson

The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 30, 7:22 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Moore, Oldham, Potter	68 min
May 30, 7:29 PM CDT	Tornado Warning	AMA	Sherman	46 min
May 30, 7:46 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Sherman	59 min
May 30, 8:14 PM CDT	Tornado Warning	AMA	Hansford, Sherman	46 min
May 30, 8:19 PM CDT	Areal Flood Advisory	AMA	Sherman	4 hr
May 30, 8:47 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson, Moore, Ochiltree, Roberts, Sherman	58 min
May 30, 9:19 PM CDT	Special Weather Statement	AMA	Moore, Potter	41 min
May 30, 9:24 PM CDT	Areal Flood Advisory	AMA	Hansford, Sherman	3 hr
May 30, 9:31 PM CDT	Special Weather Statement	AMA	Ochiltree, Roberts	44 min
May 30, 9:54 PM CDT	Special Weather Statement	AMA	Hutchinson, Potter	36 min
May 30, 10:14 PM CDT	Special Weather Statement	AMA	Ochiltree, Roberts	46 min
May 30, 10:27 PM CDT	Areal Flood Advisory	AMA	Potter	3 hr
May 30, 10:27 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Potter, Randall	63 min
May 30, 10:30 PM CDT	Special Weather Statement	AMA	Carson, Hutchinson	60 min
May 30, 10:35 PM CDT	Special Weather Statement	AMA	Gray	25 min
May 30, 10:38 PM CDT	Tornado Warning	AMA	Carson, Gray	22 min
May 30, 10:53 PM CDT	Special Weather Statement	AMA	Hemphill, Lipscomb	67 min
May 30, 10:57 PM CDT	Flash Flood Warning	AMA	Armstrong, Carson, Potter, Randall	4 hr
May 30, 11:32 PM CDT	Special Weather Statement	AMA	Gray	28 min
May 31, 12:03 AM CDT	Special Weather Statement	AMA	Gray	27 min
May 31, 12:04 AM CDT	Areal Flood Advisory	AMA	Carson, Gray, Hemphill, Roberts	3 hr
May 31, 12:28 AM CDT	Special Weather Statement	AMA	Collingsworth	32 min
May 31, 12:29 AM CDT	Areal Flood Advisory	AMA	Armstrong, Carson, Randall	12 min
May 31, 12:41 AM CDT	Flash Flood Warning	AMA	Armstrong, Carson, Randall	3 hr
May 31, 12:47 AM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Wheeler	58 min
May 31, 1:12 AM CDT	Areal Flood Advisory	AMA	Armstrong, Collingsworth, Donley, Gray, Hemphill, Randall and 1 more	3 hr
May 31, 1:28 AM CDT	Flash Flood Warning	AMA	Donley, Gray	3 hr

Nearby

Flash Flood Warnings in Texas, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.