Alert archive / Texas / Flash Flood Warnings in 2021

Flash Flood Warning 30, NWS Brownsville, TX

July 9, 2021Cameron County, Texas

NWS Brownsville, TX issued this flash flood warning at Jul 9, 2021, 6:47 AM CDT for Cameron County, Texas. It was in force for 3 hr. 2 reports 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
Jul 9, 2021, 6:47 AM CDT (11:47 UTC)
Expired
Jul 9, 2021, 9:42 AM CDT
In force
3 hr
Issued by
NWS Brownsville, TX
Area
Storm-based polygon
Flood severity
None

County Cameron County, TX

The radar

The Brownsville radar (KBRO), 27 km from the middle of the area, began a volume at 11:50 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

TimeReportWhereRemark
Jul 9, 8:55 AM CDTFLASH FLOOD1 E Port Isabel, TXPICTURE FROM SOCIAL MEDIA SHOWING MARINA DRIVE COVERED WITH SEVERAL INCHES OF WATER.
Jul 9, 9:25 AM CDTFLASH FLOOD3 N South Padre Island, TXSOCIAL MEDIA VIDEO SHOWS SEVERAL SEGMENTS OF PADRE BOULEVARD COVERED WITH WATER ALONG WITH NUMEROUS SIDE STREETS.

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

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 00:00Z, 11.8 hours before the alert went out and 28 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 2021-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1544 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 2021-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 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
1544 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
707 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

126 
WGUS54 KBRO 091147
FFWBRO
TXC061-091500-
/O.NEW.KBRO.FF.W.0030.210709T1147Z-210709T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Brownsville has issued a

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

* Until 1000 AM CDT.

* At 647 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. 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...
  South Padre Island, Arroyo City, Holly Beach, Laguna Vista Police 
  Department, Pharr Central Fire Station, Beach Access Six, Beach 
  Access Five, Beach Access Four, Laguna Heights, South Padre Island 
  Convention Center, South Padre Island Birding Center, Port Isabel 
  High School, South Padre Island Police Department, Port Isabel 
  City Hall, Port Isabel Lighthouse, Port Isabel Fire And Police 
  Department, Garria Elementary School, Washington Park, U.s. Coast 
  Guard Station and Boca Chica Beach.

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 2622 9753 2633 9749 2634 9747 2632 9745
      2634 9744 2636 9737 2636 9718 2597 9713
      2597 9715 2595 9715 2595 9716 2596 9716
      2597 9718 2596 9719 2596 9721 2620 9737

FLASH FLOOD...RADAR INDICATED

$$
1 follow-up statement
141 
WGUS74 KBRO 091442
FFSBRO

Flash Flood Statement
National Weather Service Brownsville TX
942 AM CDT Fri Jul 9 2021

TXC061-091452-
/O.CAN.KBRO.FF.W.0030.000000T0000Z-210709T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cameron TX-
942 AM CDT Fri Jul 9 2021

...FLASH FLOOD WARNING FOR NORTHEASTERN CAMERON COUNTY HAS BEEN 
REPLACED WITH A FLOOD ADVISORY...

LAT...LON 2622 9753 2633 9749 2634 9747 2632 9745
      2634 9744 2636 9737 2636 9718 2597 9713
      2597 9715 2595 9715 2595 9716 2596 9716
      2597 9718 2596 9719 2596 9721 2620 9737

$$

Mejia

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 9:27 PM CDTAreal Flood AdvisoryBROCameron56 min
Jul 9, 1:47 AM CDTAreal Flood AdvisoryBROCameron118 min
Jul 9, 2:18 AM CDTRip Current StatementBROKenedy17 hr
Jul 9, 3:41 AM CDTFlash Flood WarningBROCameron6 hr
Jul 9, 4:32 AM CDTSpecial Weather StatementBROCameron43 min
Jul 9, 5:03 AM CDTSpecial Weather StatementBROCameron42 min
Jul 9, 5:08 AM CDTAreal Flood AdvisoryBROCameron2 hr
Jul 9, 5:14 AM CDTSpecial Marine WarningBRO46 min
Jul 9, 5:22 AM CDTSevere Thunderstorm WarningBROCameron38 min
Jul 9, 5:44 AM CDTFlash Flood WarningBROCameron4 hr
Jul 9, 5:51 AM CDTSpecial Marine WarningBRO54 min
Jul 9, 6:05 AM CDTSpecial Marine WarningBRO25 min
Jul 9, 6:24 AM CDTSpecial Marine WarningBRO51 min
Jul 9, 7:05 AM CDTSpecial Marine WarningBRO55 min
Jul 9, 9:16 AM CDTSmall Craft AdvisoryBRO4 hr
Jul 9, 9:36 AM CDTAreal Flood AdvisoryBROCameron4 hr
Jul 9, 9:39 AM CDTAreal Flood AdvisoryBROCameron4 hr
Jul 9, 9:42 AM CDTAreal Flood AdvisoryBROCameron4 hr
Jul 9, 2:57 PM CDTSpecial Weather StatementBROHidalgo48 min
Jul 9, 3:36 PM CDTAreal Flood AdvisoryBROCameron26 min
Jul 9, 3:40 PM CDTAreal Flood AdvisoryBROCameron13 min
Jul 9, 3:44 PM CDTFlash Flood WarningBROCameron2 hr
Jul 9, 3:52 PM CDTFlash Flood WarningBROCameron42 min
Jul 9, 4:23 PM CDTFlash Flood WarningBROCameron2 hr
Jul 9, 4:59 PM CDTAreal Flood AdvisoryBROWillacy51 min
Jul 9, 5:09 PM CDTSpecial Weather StatementBROBrooks51 min
Jul 9, 5:10 PM CDTSpecial Weather StatementBROKenedy50 min
Jul 9, 5:45 PM CDTAreal Flood AdvisoryBROCameron51 min
Jul 9, 5:59 PM CDTSpecial Weather StatementBROKleberg16 min
Jul 9, 6:01 PM CDTSpecial Weather StatementBROKenedy14 min
Jul 9, 6:09 PM CDTAreal Flood AdvisoryBROKenedy, Willacy51 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.