Flash Flood Warning 2, NWS Brownsville, TX

868 
WGUS74 KBRO 151231
FFSBRO

Flash Flood Statement
National Weather Service Brownsville TX
731 AM CDT Mon Jun 15 2026

TXC061-215-151400-
/O.CON.KBRO.FF.W.0002.000000T0000Z-260615T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cameron TX-Hidalgo TX-
731 AM CDT Mon Jun 15 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING
FOR WESTERN CAMERON AND SOUTHEASTERN HIDALGO COUNTIES...

At 731 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1.5 and 3 inches of rain have
fallen. Additional rainfall amounts up to 2 inches are possible in
the warned area with the next activity working north. Flash flooding
is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

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...
  Weslaco, Alamo, Donna, Mercedes, Weslaco Fire Department Station
  Two, Weslaco City Hall, Weslaco Public Library, Alameda Park,
  Weslaco High School, Sam Houston Elementary School, Harlon Block
  Sports Complex, Isaac D. Rodriguez Park, Knapp Medical Center,
  Black Elementary School, Weslaco City Park, Weslaco Border Patrol
  Station, Midway South, Weslaco Fire Department Station One and
  Weslaco East High School.

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.

&&

LAT...LON 2621 9812 2612 9814 2611 9786 2620 9786

FLASH FLOOD...RADAR INDICATED

$$

547 
WGUS54 KBRO 151341
FFWBRO
TXC061-215-151500-
/O.EXT.KBRO.FF.W.0002.000000T0000Z-260615T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Brownsville TX
841 AM CDT Mon Jun 15 2026

The National Weather Service in Brownsville has extended the

* Flash Flood Warning for...
  Western Cameron County in deep south Texas...
  Southeastern Hidalgo County in deep south Texas...

* Until 1000 AM CDT.

* At 841 AM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Between 2 and 4 inches of rain
  have fallen. 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 indicated.

  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...
  Weslaco, Alamo, Donna, Mercedes, Weslaco Fire Department Station
  Two, Weslaco City Hall, Weslaco Public Library, Alameda Park,
  Weslaco High School, Sam Houston Elementary School, Harlon Block
  Sports Complex, Isaac D. Rodriguez Park, Knapp Medical Center,
  Black Elementary School, Weslaco City Park, Weslaco Border Patrol
  Station, Midway South, Weslaco Fire Department Station One and
  Weslaco East High School.

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.

&&

LAT...LON 2621 9812 2612 9814 2611 9786 2620 9786

FLASH FLOOD...RADAR INDICATED

$$

Area Forecast Discussion...UPDATED
National Weather Service Brownsville TX
622 AM CDT Mon Jun 15 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 619 AM CDT Mon Jun 15 2026

- A Flood Watch is in effect from Monday afternoon through Wednesday
morning. Numerous Flash Floods are likely Monday into Tuesday.

- There is a Marginal (level 1 of 4) Risk of Excessive Rainfall across
  Deep South Texas overnight. There is a Slight (level 2 of 4) to
  Moderate (level 3 of 4) Risk of Excessive Rainfall across the
  area Monday and Monday night. A Slight (level 2 of 4) Risk of
  Excessive Rainfall across all of Deep South Texas Tuesday and
  Tuesday night. A Marginal to Slight Risk of Excessive Rainfall
  continues across much of the region Wednesday into Wednesday
  night with a Marginal Risk lingering along the coast on
  Thursday.

- A Moderate to Major (levels 2-3 of 4) Heat Risk is forecast Thursday
  into Saturday. Heat Advisories may be needed Thursday and
  Friday.

- The National Hurricane Center continues a low chance (30%) of tropical
  development over the northwestern Gulf over the next 7 days.

&&

.DISCUSSION...
Issued at 1043 PM CDT Sun Jun 14 2026

The combination of an enhanced seabreeze, a low of low pressure over
northeastern Mexico/Deep South Texas and the interaction of a weak
front boundary will lead to unsettled weather through at least
midweek. Deep tropical moisture will continue to surge into Deep
South Texas tonight into Tuesday. This evening's 0Z Brownsville
sounding indicated a PWAT value of 2.38 inches. Rain chances are
expected to increase after midnight and there is a moderate to high
(50-70%) chance of rain overnight, mainly across the Low to middle
Rio Grande Valley and along the coast. The latest HRRR suggests that
some activity may develop and move into Cameron County around 3 AM.
There is a moderate to high (50-80%) chance of rain showers and
isolated thunderstorms on Monday, especially in the afternoon and
early evening. The forecast rainfall amounts between 1.5 to 3
inches, locally higher. PWATS surge between 2.5 to 2.75 inches
across the Rio Grande Plains Monday evening. Rain chances increase
to high (75-90%) Monday night. Numerous flash floods are likely
across Deep South Texas with scattered flash flooding possible near
the coast.

High (80-90%) rain chances continue Tuesday with scattered flash
flooding possible. Rain chances (30-60%) Tuesday night decreasing
from west to east. Forecast rainfall amounts between 1.5 to 3
inches, locally higher. Rain chances linger Wednesday into Wednesday
night as timing remains uncertain between the model guidance. There
is a low to moderate (20-50%) chance of rain, especially near the
coast on Wednesday with a low chance Wednesday night.

The forecast rainfall totals across the area from Monday into
Wednesday are 3 to 6 inches, with locally higher amounts of 8 inches
or higher where showers or thunderstorms persist.

The trough of low pressure located over northeastern Mexico could re-
emerge over the Gulf late Tuesday into Wednesday. The National
Hurricane Center has a 30% chance for tropical development through
day 7. Any development at that point would likely have minimal
impact on Deep South Texas. However, some increased swell along the
coast is possible, which could result in minor coastal flooding and
increased rip current risk.

The increased cloud cover and rain chances will lead to slightly
lower daytime temperatures through midweek. Drier weather returns on
Thursday as high humidity continues. There is a Moderate to Major
(levels 2-3 of 4) Heat Risk Thursday into Saturday. Heat Advisories
may be needed Thursday and Friday.

&&

.AVIATION...
(12Z TAFS)
Issued at 619 AM CDT Mon Jun 15 2026

The latest issuance of TAFs reflect current radar trends as well
as shifts in the HRRR model guidance. Overall, VFR will remain for
a majority of the period. Prevailing TSRA will occur tonight as
deep tropical moisture interacts with low pressure in the middle
layers of the atmosphere.

&&

.MARINE...
Issued at 1043 PM CDT Sun Jun 14 2026

Generally favorable marine conditions are forecast to continue
through Tuesday. Showers and thunderstorms will increase along the
Lower Texas Coast and the Gulf waters tonight through mid to late
week. Adverse to hazardous conditions could return Wednesday and
Thursday, and Small Craft Advisories or Small Craft Should Exercise
Caution headlines may be needed.

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             90  79  85  77 /  50  70  80  60
HARLINGEN               89  76  84  74 /  60  80  90  60
MCALLEN                 90  77  84  77 /  80  90  90  50
RIO GRANDE CITY         90  75  84  74 /  80  90  90  40
SOUTH PADRE ISLAND      87  81  85  80 /  40  60  70  60
BAYVIEW/PORT ISABEL     89  78  85  77 /  50  70  80  60

&&

.BRO WATCHES/WARNINGS/ADVISORIES...
TX...Flood Watch from 1 PM CDT this afternoon through Wednesday
     morning for TXZ248>255-351-353>355-451-454-455.

GM...None.
&&