Texas, 2026Flash Flooding in Texas, June 15, 2026
June 15, 2026 · NWS BRO · 2 events in 2 counties and zones
A repeating band of slow-moving showers and thunderstorms over the Weslaco/Donna area during the early to mid morning of June 15th produced areas of notable flash flooding. Up to 7 inches of rain fell in a little more than two hours, leaving some streets with up to three feet of water depth and water into several properties.
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- Deaths
- 0
- Injuries
- 0
- Property damage
- $5.0 million
- Crop damage
- None recorded
- Events
- 2
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
A repeating band of slow-moving showers and thunderstorms over the Weslaco/Donna area during the early to mid morning of June 15th produced areas of notable flash flooding. Up to 7 inches of rain fell in a little more than two hours, leaving some streets with up to three feet of water depth and water into several properties. Another round of thunderstorms developed during the late afternoon across Starr and Jim Hogg County, with urban flooding across portions of Rio Grande City based on an estimated 3-5 of rainfall there.
What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Brownsville, TX wrote its last area forecast discussion before the first event at Jun 15, 5:22 AM CST, 1 hour 53 minutes earlier. Its 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.
Area forecast discussion, Jun 15, 5:22 AM CST, 1 hour 53 minutes before
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.
&&Flash Flood, Hidalgo
- When
- June 15, 7:15 AM CST to 10:30 AM CST
- Where
- Hidalgo County, 3.24 mi N of Mercedes to 3.52 mi NNE of Donna
- Cause
- Heavy Rain
- Property damage
- $5.0 million
- Reported by
- Public
- Coordinates
- 26.197, -97.922
Torrential rainfall the began just before the morning commute would soon add up to notable flash flooding across Weslaco, parts of Mercedes, and extending westward to the east side of Donna and southward to near US 281 (Progreso). Rainfall totals of near 7 inches were recorded along IH-2 near the Mid-Valley Airport, in just over two hours. Flash flooding included numerous streets, including the frontage road, with 2-3 feet of water as well as several properties with water incursion into them. Some of the reports included:|*Numerous social media reports and news media coverage of flooding along the I-2 frontage road in Weslaco near North Republic St and North Texas Blvd.|*The IH-2 frontage road was closed (eastbound) between Westgate and Texas Boulevard (Exits 157 to 155). |*A city disaster declaration was issued by the Mayor of Weslaco due to the extensive nature of the flooding.
Flash Flood, Starr
- When
- June 15, 4:00 PM CST to 6:00 PM CST
- Where
- Starr County, 1.38 mi SSW of Rio Grande City Arpt to 1 mi NNE of Olnos
- Cause
- Heavy Rain
- Reported by
- Law Enforcement
- Coordinates
- 26.401, -98.858
Torrential rain that was estimated by bias-corrected radar between 3 and 5 inches in 2 hours or less created localized flash flooding in and near Rio Grande City. A CoCoRaHS observer in La Lomita Colonia 3.5 miles northeast of Rio Grande City reported 3.65. Law enforcement reported multiple flooded roadways due to heavy rainfall, as well as flooded streets (with some flowing water) near FM 3167 and Eisenhower Blvd. in the northwest portion of town, with side streets flooded as well.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Flash Flooding and Flood in Texas, June 15 to 17, 20262 deaths · 11 events
- Flash Flooding in Texas, June 15, 20261 death · $50,000 · 29 events
- Flash Flooding in Mississippi, June 15 to 16, 2026$70,000 · 11 events
- Tornado and Flash Flood in Florida, June 15 to 19, 2026$16,000 · EF0 · 41 events
- Flash Flood in Vermont, June 15, 2026$75,000 · 1 event
- Flash Flooding in Louisiana, June 15, 202620 events
- Damaging Winds and High Wind in South Dakota, June 15, 202660 kt wind · 20 events
- Flash Flooding in Texas, June 15 to 16, 202620 events
- Flash Flooding in Texas, June 15, 20264 events
- Flash Flooding in Texas, June 15 to 16, 2026$2,000 · 4 events
- Wildfire in Florida, June 15 to 30, 20263 events
- Damaging Winds in Minnesota, June 15, 202658 kt wind · 3 events
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1355131, 1355132.