Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 11, NWS Amarillo, TX

July 5, 2021Randall County, Texas

NWS Amarillo, TX issued this flash flood warning at Jul 5, 2021, 2:34 AM CDT for Randall County, Texas. It was in force for 112 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 5, 2021, 2:34 AM CDT (07:34 UTC)
Expired: Jul 5, 2021, 4:26 AM CDT
In force: 112 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Flood severity: None

County Randall County, TX

The radar

The Amarillo radar (KAMA), 19 km from the middle of the area, began a volume at 07:37 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 7.6 hours before the alert went out and 19 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: 2304 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1243 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 7.9

Open this sounding in Storm Lab

The text

As transmitted.

162 
WGUS54 KAMA 050734
FFWAMA
TXC381-051030-
/O.NEW.KAMA.FF.W.0011.210705T0734Z-210705T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Amarillo TX
234 AM CDT Mon Jul 5 2021

The National Weather Service in Amarillo has issued a

* Flash Flood Warning for...
  Northeastern Randall County in the panhandle of Texas...

* Until 530 AM CDT.

* At 234 AM CDT, gauge reports indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. The expected rainfall rate is 2.5 to 3 inches in 1 
  hour. Additional rainfall amounts of 1 to 2 inches are possible in 
  the warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Gauges 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...
  Amarillo, Canyon, Lake Tanglewood, Mescalero Park and Timbercreek 
  Canyon.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3508 10162 3501 10172 3500 10178 3499 10184
      3500 10194 3503 10196 3509 10195 3512 10191
      3516 10183 3518 10174 3518 10162

FLASH FLOOD...GAUGE INDICATED
EXPECTED RAINFALL...2.5-3 INCHES IN 1 HOUR

$$

DGW

2 follow-up statements

596 
WGUS74 KAMA 050802
FFSAMA

Flash Flood Statement
National Weather Service Amarillo TX
302 AM CDT Mon Jul 5 2021

TXC381-051030-
/O.CON.KAMA.FF.W.0011.000000T0000Z-210705T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Randall TX-
302 AM CDT Mon Jul 5 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 AM CDT EARLY THIS 
MORNING FOR NORTHEASTERN RANDALL COUNTY...

At 302 AM CDT, gauge reports indicated thunderstorms producing heavy 
rain across the warned area. 2 to 3 inches of rain have fallen. 
Storm has weakened and minimal rainfall is expected.  Flash flooding 
is still possible from the recent intense rainfall over a short time.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Gauges 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...
  Amarillo, Lake Tanglewood, Mescalero Park and Timbercreek Canyon.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3508 10162 3501 10172 3499 10184 3501 10189
      3503 10191 3508 10190 3512 10190 3516 10183
      3518 10174 3518 10162 3513 10162 3509 10162

FLASH FLOOD...GAUGE INDICATED
EXPECTED RAINFALL...2.5-3 INCHES IN 1 HOUR

$$

DGW

960 
WGUS74 KAMA 050926
FFSAMA

Flash Flood Statement
National Weather Service Amarillo TX
426 AM CDT Mon Jul 5 2021

TXC381-050936-
/O.CAN.KAMA.FF.W.0011.000000T0000Z-210705T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Randall TX-
426 AM CDT Mon Jul 5 2021

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN RANDALL 
COUNTY...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

LAT...LON 3508 10162 3501 10172 3499 10184 3501 10189
      3503 10191 3508 10190 3512 10190 3516 10183
      3518 10174 3518 10162 3513 10162 3509 10162

$$

DGW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 7:06 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Oldham	84 min
Jul 4, 7:31 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	89 min
Jul 4, 7:42 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hansford, Sherman	93 min
Jul 4, 7:43 PM CDT	Areal Flood Advisory	AMA	Deaf Smith, Oldham	90 min
Jul 4, 7:52 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	83 min
Jul 4, 9:00 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	50 min
Jul 4, 9:00 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Moore, Sherman	60 min
Jul 4, 9:52 PM CDT	Areal Flood Advisory	AMA	Dallam, Hartley	53 min
Jul 4, 10:28 PM CDT	Special Weather Statement	AMA	Oldham	62 min
Jul 4, 10:40 PM CDT	Severe Thunderstorm Warning	AMA	Hartley, Oldham	65 min
Jul 4, 11:05 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham, Potter, Randall	55 min
Jul 4, 11:28 PM CDT	Special Weather Statement	AMA	Deaf Smith	47 min
Jul 4, 11:36 PM CDT	Special Weather Statement	AMA	Gray	24 min
Jul 4, 11:39 PM CDT	Special Weather Statement	AMA	Randall	36 min
Jul 5, 12:01 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Donley, Gray	59 min
Jul 5, 12:35 AM CDT	Special Weather Statement	AMA	Gray	25 min
Jul 5, 12:59 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson	61 min
Jul 5, 1:31 AM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson, Potter, Randall	74 min
Jul 5, 2:43 AM CDT	Special Weather Statement	AMA	Randall	47 min
Jul 5, 2:57 AM CDT	Areal Flood Advisory	AMA	Donley	3 hr
Jul 5, 6:38 AM CDT	Areal Flood Advisory	AMA	Collingsworth, Wheeler	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.