Texas, 2024

Flash Flooding in Texas, July 25 to 27, 2024

July 25 to 27, 2024 · NWS CRP · 2 events in 1 county or zone

A deep trough stretched across South Texas into Mexico, leading to favorable conditions for efficient rainfall over the Coastal Bend. Greatest rainfall occurred on July 25th, with over 10 falling in just 6 hours over North Padre Island and rainfall rates up to 4 an hour.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
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.

What happened

The episode as NWS CRP wrote it up.

A deep trough stretched across South Texas into Mexico, leading to favorable conditions for efficient rainfall over the Coastal Bend. Greatest rainfall occurred on July 25th, with over 10 falling in just 6 hours over North Padre Island and rainfall rates up to 4 an hour. Several reports of streets flooded along Padre Island and in poor drainage areas of Corpus Christi.

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 Corpus Christi, TX wrote its last area forecast discussion before the first event at Jul 25, 5:35 AM CST, 55 minutes earlier.

Area forecast discussion, Jul 25, 5:35 AM CST, 55 minutes before
Area Forecast Discussion
National Weather Service Corpus Christi TX
635 AM CDT Thu Jul 25 2024

...New AVIATION...

.SHORT TERM...
(Today through Friday)
Issued at 235 AM CDT Thu Jul 25 2024

Key Messages:

- Medium to high chance of showers and thunderstorms through Friday.

- Slight to Moderate Risk of excessive rainfall and flash flooding through
  tonight.

- Marginal Risk of excessive rainfall and flash flooding Friday
  through Friday night.

The short-term continues to promote rainy conditions today and
Friday. A mid- to upper-level trough over South Texas is expected
to deepen further to the south-southwest. Some models indicate
the potential development of a cutoff low by late this morning or
early afternoon. The interaction of several shortwaves, combined
with abundance moisture from the Gulf of Mexico (PWATs 2.0 to 2.5
inches), will facilitate scattered to numerous showers and
thunderstorms through tomorrow.

The timing and location of these showers and storms still remains
a bit uncertain. High-resolution models suggest higher chances of
rain over the waters and along the Coastal Bend and Victoria
Crossroads, though areas west of HWY-281 may also experience
activity later today. Overnight, rain chances will persist, mainly
over area waters and the easternmost portions of the CWA. On
Friday, a similar pattern is expected, with showers and storms
primarily developing over the waters and along the Coastal Bend
and Victoria Crossroads, expanding westward as the day progresses.

Today, The Weather Prediction Center has now issued a Moderate
Risk (level 3 out of 4) for excessive rainfall and flash flooding
in parts of Calhoun, Refugio, Aransas and Victoria counties. A
Slight Risk (level 2 out of 4) applies to the remainder of the
Victoria Crossroads and portions of the Coastal Plains, while a
Marginal Risk (level 1 out of 4) covers the rest of South Texas.
On Friday, a Marginal Risk (level 1 out of 4) will extend across
all of South Texas.

Out of an abundance of caution, we have decided to issue a Flood
Watch for Victoria, Calhoun, Refugio, and Aransas counties through
Friday evening. Forecast excessive rainfall may cause minor
flooding in urban areas, poor drainage zones, and low-lying
regions. Localized flash flooding is also possible in some areas.
Locations affected by entraining storms may face a higher risk of
flooding. Additionally there may be rises in rivers and small
streams.

Lastly, rainfall and cloud cover will result in cooler
temperatures in the short term. Highs will range from the mid-80s
to low 90s, with some northeastern locations experiencing
temperatures in the low 80s. Cloud cover will also keep nighttime
lows in the low to mid-70s.

&&

.LONG TERM...
(Friday night through next Wednesday)
Issued at 235 AM CDT Thu Jul 25 2024

Key Messages:

- Medium to high chance of showers and thunderstorms through Sunday

- Marginal risk of excessive rainfall through the weekend

- Minor risk of heat stress related impacts through the weekend,
becoming minor to moderate by early next week

A mid-level low and associated trough will continue to linger over
Texas through the weekend with deep tropical moisture (PWATs remain
around 2.0-2.5 inches) keeping showers and thunderstorms in the
forecast through Sunday. The Weather Prediction Center (WPC) has
included South Texas in a Marginal Risk of Excessive Rainfall
through 12Z Monday. Training, slow moving showers could lead to some
isolated flash flooding concerns. Low pressure will shift out of the
area beginning Sunday, allowing high pressure to build in from the
east. Rain chances will finally begin to diminish Sunday night, with
only a few isolated showers and storms expected over the Victoria
Crossroads Monday and Tuesday afternoon.

As high pressure returns, so will our warmer temperatures.
Fortunately, highs will only rise just below to right at normal for
this time of year through the middle of the week. Conditions will
dry out early in the week, with PWATs dropping to below 2" by the
middle of the week. The combination of the warmer temperatures and
lingering moisture will lead to a moderate heat risk over portions
of South Texas early and through the middle of next week, with heat
index values approaching 110.

&&

.AVIATION...
(12Z TAFS)
Issued at 628 AM CDT Thu Jul 25 2024
Showers and thunderstorms are currently moving across area waters
as well as easternmost portions of the Coastal Bend. This wet
pattern will continue through much of this TAF cycle. The highest
precipitation potential remains closer to the coast, but all sites
are expected to see at least some shower or convective activity
today. Showers and storms should begin to dissipate by sundown,
however isolated to scattered precipitation activity could linger
into the overnight hours. Uncertainty still exists for timing and
location for late evening and overnight precipitation. Mostly a
back and forth mix of VFR CIGs and VSBYs will be in place most of
the period, with MVFR conditions prevailing in and around
convection, along with gusty winds.

&&

.MARINE...
Issued at 235 AM CDT Thu Jul 25 2024

Weak to occasionally moderate onshore flow is expected through the
middle of the week. Scattered to numerous showers and thunderstorms
will persist through the weekend, diminishing early next week as
high pressure builds into the area.

&&

.PRELIMINARY POINT TEMPS/POPS...
Corpus Christi    86  76  87  75 /  70  40  50  50
Victoria          83  73  85  73 /  90  50  70  40
Laredo            92  75  89  74 /  40  20  50  40
Alice             89  74  88  73 /  70  40  70  40
Rockport          89  76  89  76 /  90  60  50  50
Cotulla           93  74  91  75 /  40  20  50  30
Kingsville        87  76  88  74 /  70  40  60  40
Navy Corpus       86  78  87  77 /  80  50  50  50

&&

.CRP WATCHES/WARNINGS/ADVISORIES...
TX...Flood Watch through Friday evening for TXZ234-245>247-345>347-
     447.

GM...None.
&&

SHORT TERM...KRS/98
LONG TERM....LS/77
AVIATION...KRS/98

The radar

The Corpus Christi radar (KCRP), 14 km away, was scanning. The volume nearest the first event began at 12:31 UTC.

Open the radar archive at this moment

Event by event

2 flash flood. Local standard time, as filed.

Flash Flood, Nueces

When
July 25, 6:30 AM CST to 9:55 AM CST
Where
Nueces County, 1.48 mi NNE of North Beach to 1.81 mi E of Viola
Cause
Heavy Rain
Reported by
Department of Highways
Coordinates
27.840, -97.381

Texas Department of Transportation reported numerous road closures due to flooding over North Beach. In addition, there were several reports of water over portions of HWY-358 and in poor drainage areas.

Flash Flood, Nueces

When
July 27, 2:30 PM CST to 4:30 PM CST
Where
Nueces County, 2.83 mi ENE of Chapman Ranch to 2.82 mi NE of Bishop
Cause
Heavy Rain
Reported by
Department of Highways
Coordinates
27.600, -97.430

Texas Department of Transportation reported closure due to water over roadways on FM70 from US-77 in Bishop to Chapman Ranch.

What these are

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.

The same day elsewhere

More

Every storm in Texas in 2024Every state in 2024This day in weather historyWarnings in Texas, July 2024

Sources

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: 1206321, 1206325.