Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 25, NWS Brownsville, TX

July 6, 2021Hidalgo County, Starr County, Texas

NWS Brownsville, TX issued this flash flood warning at Jul 6, 2021, 10:50 PM CDT for Hidalgo County, Starr County, Texas. It was in force for 115 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 6, 2021, 10:50 PM CDT (03:50 UTC)
Expired
Jul 7, 2021, 12:45 AM CDT
In force
115 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon
Flood severity
None

Counties Hidalgo County, TX, Starr County, TX

The radar

The Brownsville radar (KBRO), 120 km from the middle of the area, began a volume at 03:53 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, 3.8 hours before the alert went out and 122 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-pSkew-T log-p diagram, Brownsville Intl, TX at 00:00Z on 2021-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 136 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brownsville Intl, TX at 00:00Z on 2021-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
136 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
828 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

059 
WGUS54 KBRO 070350
FFWBRO
TXC215-427-070545-
/O.NEW.KBRO.FF.W.0025.210707T0350Z-210707T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Brownsville TX
1050 PM CDT Tue Jul 6 2021

The National Weather Service in Brownsville has issued a

* Flash Flood Warning for...
  West Central Hidalgo County in deep south Texas...
  South Central Starr County in deep south Texas...

* Until 1245 AM CDT.

* At 1050 PM CDT, Doppler radar indicated 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 heavy rain.

  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...
  Sullivan City, Los Ebanos, Sam Fordyce Elementary School, 
  Cuevitas, La Joya City Hall, Mcallen, Havana and Rio Grande 
  City--roma.

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 2624 9865 2634 9862 2632 9846 2621 9849
      2621 9851 2622 9850 2622 9852 2624 9852
      2623 9854 2624 9854 2625 9856 2624 9855
      2622 9856 2624 9857 2623 9858 2626 9859
      2625 9862 2626 9862 2624 9863

FLASH FLOOD...RADAR INDICATED

$$

Mejia
1 follow-up statement
795 
WGUS74 KBRO 070543
FFSBRO

Flash Flood Statement
National Weather Service Brownsville TX
1243 AM CDT Wed Jul 7 2021

TXC215-427-070553-
/O.EXP.KBRO.FF.W.0025.000000T0000Z-210707T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hidalgo TX-Starr TX-
1243 AM CDT Wed Jul 7 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 1245 AM CDT EARLY THIS MORNING 
FOR WEST CENTRAL HIDALGO AND SOUTH CENTRAL STARR COUNTIES...

Flood waters have receded. Nuisance flooding may still occur. Please 
continue to heed remaining road closures.

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

LAT...LON 2624 9865 2634 9862 2632 9846 2621 9849
      2621 9851 2622 9850 2622 9852 2624 9852
      2623 9854 2624 9854 2625 9856 2624 9855
      2622 9856 2624 9857 2623 9858 2626 9859
      2625 9862 2626 9862 2624 9863

$$

Mejia

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 7:25 PM CDTAreal Flood AdvisoryBROStarr, Zapata74 min
Jul 6, 8:29 PM CDTAreal Flood AdvisoryBROHidalgo102 min
Jul 6, 8:35 PM CDTAreal Flood AdvisoryBROCameron, Hidalgo, Willacy4 hr
Jul 6, 9:00 PM CDTFlash Flood WarningBROWillacy3 hr
Jul 6, 9:27 PM CDTFlash Flood WarningBROHidalgo108 min
Jul 6, 10:00 PM CDTAreal Flood AdvisoryBROHidalgo, Kenedy, Starr, Willacy3 hr
Jul 6, 10:35 PM CDTAreal Flood AdvisoryBROCameron115 min
Jul 6, 11:01 PM CDTFlash Flood WarningBROCameron82 min
Jul 7, 12:27 AM CDTAreal Flood AdvisoryBROCameron, Hidalgo, Willacy4 hr
Jul 7, 12:33 AM CDTAreal Flood AdvisoryBROCameron3 hr
Jul 7, 12:43 AM CDTAreal Flood AdvisoryBROHidalgo3 hr
Jul 7, 1:50 AM CDTSpecial Marine WarningBRO25 min
Jul 7, 2:28 AM CDTSpecial Marine WarningBRO62 min
Jul 7, 3:13 AM CDTAreal Flood AdvisoryBROHidalgo3 hr
Jul 7, 3:22 AM CDTSpecial Marine WarningBRO53 min
Jul 7, 3:57 AM CDTAreal Flood AdvisoryBROCameron, Hidalgo, Willacy11 hr
Jul 7, 3:59 AM CDTAreal Flood AdvisoryBROHidalgo, Starr5 hr
Jul 7, 5:53 AM CDTAreal Flood AdvisoryBROHidalgo9 hr
Jul 7, 8:59 AM CDTAreal Flood AdvisoryBROHidalgo3 hr
Jul 7, 11:43 AM CDTSpecial Weather StatementBROCameron47 min
Jul 7, 12:10 PM CDTAreal Flood AdvisoryBROCameron3 hr
Jul 7, 2:19 PM CDTSpecial Marine WarningBRO41 min
Jul 7, 2:56 PM CDTSpecial Marine WarningBRO34 min
Jul 7, 3:03 PM CDTSpecial Marine WarningBRO42 min
Jul 7, 3:59 PM CDTSpecial Marine WarningBRO31 min
Jul 7, 4:48 PM CDTSpecial Marine WarningBRO27 min
Jul 7, 6:46 PM CDTAreal Flood AdvisoryBROHidalgo, Starr2 hr

Nearby

Flash Flood Warnings in Texas, 2021Every 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.