Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 31, NWS Brownsville, TX

July 9, 2021Cameron County, Texas

NWS Brownsville, TX issued this flash flood warning at Jul 9, 2021, 3:44 PM CDT for Cameron County, Texas. It was in force for 2 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: Jul 9, 2021, 3:44 PM CDT (20:44 UTC)
Expired: Jul 9, 2021, 5:45 PM CDT
In force: 2 hr
Issued by: NWS Brownsville, TX
Area: Storm-based polygon
Flood severity: None

County Cameron County, TX

The radar

The Brownsville radar (KBRO), 2 km from the middle of the area, began a volume at 20:47 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.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 8.7 hours before the alert went out and 204 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: 994 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 646 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

019 
WGUS54 KBRO 092044
FFWBRO
TXC061-092215-
/O.NEW.KBRO.FF.W.0031.210709T2044Z-210709T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Brownsville TX
344 PM CDT Fri Jul 9 2021

The National Weather Service in Brownsville has issued a

* Flash Flood Warning for...
  South Central Cameron County in deep south Texas...

* Until 515 PM CDT.

* At 344 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 3 and 7 inches of rain 
  have fallen today. The expected rainfall rate is 1 to 2 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...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...
  Rancho Viejo, Cameron Park, Port Of Brownsville, Southmost, 
  Downtown Brownsville, Olmito, Brownsville, Lincoln Park, Gallegos 
  Elementary School, Gonzalez Elementary School, Perkins Middle 
  School, Rivera High School, Vela Middle School, Brownsville Fire 
  Department Station Six, Brownsville Event Center, Hanna High 
  School, Northside Transfer Station, Brownsville Golf Center, North 
  Brownsville Little League and B I S D Administration Building.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 2606 9757 2607 9740 2593 9734 2591 9737
      2589 9736 2588 9737 2588 9736 2587 9736
      2586 9738 2585 9736 2584 9737 2584 9740
      2586 9741 2584 9741 2584 9743 2585 9745
      2587 9744 2587 9746 2588 9746 2588 9749

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

Farris

2 follow-up statements

775 
WGUS54 KBRO 092201
FFWBRO
TXC061-092245-
/O.EXT.KBRO.FF.W.0031.000000T0000Z-210709T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Brownsville TX
501 PM CDT Fri Jul 9 2021

The National Weather Service in Brownsville has extended the

* Flash Flood Warning for...
  South Central Cameron County in deep south Texas...

* Until 545 PM CDT.

* At 501 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 4 and 7 inches of rain 
  have fallen. The expected rainfall rate is 0.5 to 1 inch in 1 
  hour. Additional rainfall amounts up to 1 inch 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...
  Rancho Viejo, Cameron Park, Port Of Brownsville, Southmost, 
  Downtown Brownsville, Olmito, Brownsville, Lincoln Park, Gallegos 
  Elementary School, Gonzalez Elementary School, Perkins Middle 
  School, Rivera High School, Vela Middle School, Brownsville Fire 
  Department Station Six, Brownsville Event Center, Hanna High 
  School, Northside Transfer Station, Brownsville Golf Center, North 
  Brownsville Little League and B I S D Administration Building.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 2606 9757 2607 9740 2593 9734 2591 9737
      2589 9736 2588 9737 2588 9736 2587 9736
      2586 9738 2585 9736 2584 9737 2584 9740
      2586 9741 2584 9741 2584 9743 2585 9745
      2587 9744 2587 9746 2588 9746 2588 9749

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.5-1 INCH IN 1 HOUR

$$

Farris

761 
WGUS74 KBRO 092237
FFSBRO

Flash Flood Statement
National Weather Service Brownsville TX
537 PM CDT Fri Jul 9 2021

TXC061-092247-
/O.EXP.KBRO.FF.W.0031.000000T0000Z-210709T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cameron TX-
537 PM CDT Fri Jul 9 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 545 PM CDT THIS AFTERNOON FOR 
SOUTH CENTRAL CAMERON COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flash Flood Watch remains in effect until 700 PM CDT for a portion 
of Deep South Texas.

LAT...LON 2606 9757 2607 9740 2593 9734 2591 9737
      2589 9736 2588 9737 2588 9736 2587 9736
      2586 9738 2585 9736 2584 9737 2584 9740
      2586 9741 2584 9741 2584 9743 2585 9745
      2587 9744 2587 9746 2588 9746 2588 9749

$$

Farris

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 9:27 PM CDT	Areal Flood Advisory	BRO	Cameron	56 min
Jul 9, 1:47 AM CDT	Areal Flood Advisory	BRO	Cameron	118 min
Jul 9, 2:18 AM CDT	Rip Current Statement	BRO	Kenedy	17 hr
Jul 9, 3:41 AM CDT	Flash Flood Warning	BRO	Cameron	6 hr
Jul 9, 4:32 AM CDT	Special Weather Statement	BRO	Cameron	43 min
Jul 9, 5:03 AM CDT	Special Weather Statement	BRO	Cameron	42 min
Jul 9, 5:08 AM CDT	Areal Flood Advisory	BRO	Cameron	2 hr
Jul 9, 5:14 AM CDT	Special Marine Warning	BRO		46 min
Jul 9, 5:22 AM CDT	Severe Thunderstorm Warning	BRO	Cameron	38 min
Jul 9, 5:44 AM CDT	Flash Flood Warning	BRO	Cameron	4 hr
Jul 9, 5:51 AM CDT	Special Marine Warning	BRO		54 min
Jul 9, 6:05 AM CDT	Special Marine Warning	BRO		25 min
Jul 9, 6:24 AM CDT	Special Marine Warning	BRO		51 min
Jul 9, 6:47 AM CDT	Flash Flood Warning	BRO	Cameron	3 hr
Jul 9, 7:05 AM CDT	Special Marine Warning	BRO		55 min
Jul 9, 9:16 AM CDT	Small Craft Advisory	BRO		4 hr
Jul 9, 9:36 AM CDT	Areal Flood Advisory	BRO	Cameron	4 hr
Jul 9, 9:39 AM CDT	Areal Flood Advisory	BRO	Cameron	4 hr
Jul 9, 9:42 AM CDT	Areal Flood Advisory	BRO	Cameron	4 hr
Jul 9, 2:57 PM CDT	Special Weather Statement	BRO	Hidalgo	48 min
Jul 9, 3:36 PM CDT	Areal Flood Advisory	BRO	Cameron	26 min
Jul 9, 3:40 PM CDT	Areal Flood Advisory	BRO	Cameron	13 min
Jul 9, 3:52 PM CDT	Flash Flood Warning	BRO	Cameron	42 min
Jul 9, 4:23 PM CDT	Flash Flood Warning	BRO	Cameron	2 hr
Jul 9, 4:59 PM CDT	Areal Flood Advisory	BRO	Willacy	51 min
Jul 9, 5:09 PM CDT	Special Weather Statement	BRO	Brooks	51 min
Jul 9, 5:10 PM CDT	Special Weather Statement	BRO	Kenedy	50 min
Jul 9, 5:45 PM CDT	Areal Flood Advisory	BRO	Cameron	51 min
Jul 9, 5:59 PM CDT	Special Weather Statement	BRO	Kleberg	16 min
Jul 9, 6:01 PM CDT	Special Weather Statement	BRO	Kenedy	14 min
Jul 9, 6:09 PM CDT	Areal Flood Advisory	BRO	Kenedy, Willacy	51 min

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.