Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 46, NWS Brownsville, TX

November 3, 2021Zapata County, Texas

NWS Brownsville, TX issued this flash flood warning at Nov 3, 2021, 10:26 PM CDT for Zapata 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: Nov 3, 2021, 10:26 PM CDT (03:26 UTC)
Expired: Nov 4, 2021, 12:30 AM CDT
In force: 2 hr
Issued by: NWS Brownsville, TX
Area: Storm-based polygon
Flood severity: None

County Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 196 km from the middle of the area, began a volume at 03:27 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

Brownsville Intl, TX (KBRO), launched 00:00Z, 3.4 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: 1382 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 914 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

324 
WGUS54 KBRO 040326
FFWBRO
TXC505-040530-
/O.NEW.KBRO.FF.W.0046.211104T0326Z-211104T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Brownsville TX
1026 PM CDT Wed Nov 3 2021

The National Weather Service in Brownsville has issued a

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

* Until 1230 AM CDT.

* At 1026 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 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...
  Morales-Sanchez.

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 2688 9921 2691 9907 2678 9909 2673 9918
      2675 9922 2685 9923

FLASH FLOOD...RADAR INDICATED

$$

Bogorad

1 follow-up statement

581 
WGUS74 KBRO 040522
FFSBRO

Flash Flood Statement
National Weather Service Brownsville TX
1222 AM CDT Thu Nov 4 2021

TXC505-040532-
/O.EXP.KBRO.FF.W.0046.000000T0000Z-211104T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Zapata TX-
1222 AM CDT Thu Nov 4 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 1230 AM CDT EARLY THIS MORNING 
FOR SOUTH CENTRAL ZAPATA COUNTY...

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

LAT...LON 2688 9921 2691 9907 2678 9909 2673 9918
      2675 9922 2685 9923

$$

Bogorad

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 3, 9:15 PM CDT	Special Weather Statement	BRO	Jim Hogg	45 min
Nov 3, 9:24 PM CDT	Special Weather Statement	BRO	Zapata	51 min
Nov 3, 9:25 PM CDT	Areal Flood Advisory	BRO	Zapata	110 min
Nov 3, 9:37 PM CDT	Areal Flood Advisory	BRO	Jim Hogg	113 min
Nov 3, 10:57 PM CDT	Special Weather Statement	BRO	Starr	48 min
Nov 3, 11:06 PM CDT	Special Weather Statement	BRO	Starr	39 min
Nov 3, 11:11 PM CDT	Areal Flood Advisory	BRO	Starr	2 hr
Nov 3, 11:39 PM CDT	Special Weather Statement	BRO	Brooks, Starr	51 min
Nov 3, 11:52 PM CDT	Areal Flood Advisory	BRO	Hidalgo, Starr	113 min
Nov 4, 12:00 AM CDT	Special Weather Statement	BRO	Hidalgo	45 min
Nov 4, 1:02 AM CDT	Special Weather Statement	BRO	Hidalgo, Willacy	43 min
Nov 4, 1:19 AM CDT	Areal Flood Advisory	BRO	Hidalgo	56 min
Nov 4, 1:27 AM CDT	Special Marine Warning	BRO		33 min
Nov 4, 1:35 AM CDT	Special Marine Warning	BRO		40 min
Nov 4, 1:46 AM CDT	Special Weather Statement	BRO	Cameron	44 min
Nov 4, 2:01 AM CDT	Special Weather Statement	BRO	Cameron	44 min
Nov 4, 2:09 AM CDT	Special Marine Warning	BRO		66 min
Nov 4, 2:11 AM CDT	Areal Flood Advisory	BRO	Hidalgo, Kenedy, Willacy	2 hr
Nov 4, 2:35 AM CDT	Areal Flood Advisory	BRO	Cameron	115 min
Nov 4, 2:51 AM CDT	Areal Flood Advisory	BRO	Cameron	114 min
Nov 4, 3:00 AM CDT	Special Weather Statement	BRO	Cameron	45 min
Nov 4, 3:08 AM CDT	Special Marine Warning	BRO		45 min
Nov 4, 3:11 AM CDT	Areal Flood Advisory	BRO	Cameron	2 hr
Nov 4, 4:01 AM CDT	Coastal Flood Advisory	BRO	Kenedy	18 hr
Nov 4, 4:01 AM CDT	Rip Current Statement	BRO	Kenedy	15 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.