Alert archive / Texas / Flash Flood Warnings in 2026
Flash Flood Warning 2, NWS Corpus Christi, TX
NWS Corpus Christi, TX issued this flash flood warning at May 21, 2026, 3:59 AM CDT for Duval County, Jim Wells County, Texas. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 21, 2026, 3:59 AM CDT (08:59 UTC)
- Expired
- May 21, 2026, 7:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Corpus Christi, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Duval County, TX, Jim Wells County, TX
The radar
The Corpus Christi radar (KCRP), 78 km from the middle of the area, began a volume at 08:59 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
| Time | Report | Where | Remark |
|---|---|---|---|
| May 21, 5:30 AM CDT | FLASH FLOOD | Alice, TX | Report of one water rescue from partially submerged vehicle in the city of Alice. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 9.0 hours before the alert went out and 94 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.
- Mixed-layer CAPE
- 1962 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 887 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.3
What forecasters said that day
The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at May 21, 1:48 AM CDT, 2 hours 11 minutes earlier. Its key messages:
- Updated at 119 AM CDT Thu May 21 2026 -Flood Watch in effect area-wide through Monday as multiple rounds of storms bring a marginal to slight risk of flash flooding each day. -Increasing risk of river flooding by this weekend due to continued rounds of heavy rainfall.
Area forecast discussion, May 21, 1:48 AM CDT, 2 hours 11 minutes before
Area Forecast Discussion
National Weather Service Corpus Christi TX
148 AM CDT Thu May 21 2026
...New DISCUSSION, AVIATION, MARINE, FIRE WEATHER...
.KEY MESSAGES...
Updated at 119 AM CDT Thu May 21 2026
-Flood Watch in effect area-wide through Monday as multiple rounds
of storms bring a marginal to slight risk of flash flooding each
day.
-Increasing risk of river flooding by this weekend due to
continued rounds of heavy rainfall.
&&
.DISCUSSION...
Issued at 119 AM CDT Thu May 21 2026
At the time of writing this discussion, yet another nocturnal MCS is
slowly progressing through South Texas (this is the third night
in a row). This morning's MCS is more of the prototypical late
spring eastward propagating system from Mexico, riding just ahead
of a convectively-enhanced shortwave. Instability is less
impressive than last night (MLCAPE around 2000 J/kg, DCAPE 900 to
1000 J/kg), but should be enough to support MCS maintenance as it
treks through the area. If the system is able to form and sustain
a robust cold pool, strong winds would be a convective hazard,
otherwise as mentioned in previous discussions hydro will likely
be the biggest concerns. One hour FFGs are as low as 2-2.5 inches
(and 3 hour FFG < 3 inches) over portions of the Brush Country and
Coastal Plains, so those in particular will be areas to monitor
early this morning.
Although the CAM suite has had a lot of issues timing the
progression of this system, based on current radar trends and
assumed system propagation, would expect precipitation to more or
less have cleared the area by 11-14Z. Similar to the last couple
days, the combination of post MCS low-lvl stabilization and weak
subsidence will somewhat limit precipitation chances during the
daytime hours. However, there is some signal for another trailing
wave during the afternoon hours, so will retain some low-medium
range PoPs (20-40%), but am pretty skeptical of the widespread
coverage some of the CAMs and the GFS depict (the storms would
likely have to initiate north of the area which is less worked
over). We will potentially have to contend with additional
overnight convection tonight into Friday morning as more storms
developing over Mexico and the West Texas dryline and gradually
propagate towards our area. There is a more muted convective
signal compared to the last couple nights, so will retain only
Chc (generally 40-50%) PoPs for now, but any additional convective
rainfall would trigger renewed hydro concerns given antecedent
conditions.
The most-amplified mid-lvl wave is still progged to move over the
area on Saturday, likely bringing fairly widespread rainfall to
the area. Hydro will likely be the greatest concern by that
point, and beyond the localized flash and urban flooding threat,
river flooding will also bear increasing monitoring. The
aforementioned mid-lvl low looks to amplify/close off near the
area on Sunday and then lift slowly to the north/northeast on
Monday/Tuesday. This could provide a setup to give us a brief
respite from the active weather as drier air filters down its
western flank from the north. Any break in precipitation looks to
be short-lived as another mid-lvl system makes it way towards the
area mid to late next week.
&&
.AVIATION...
(06Z TAFS)
Issued at 119 AM CDT Thu May 21 2026
An ongoing cluster of showers and thunderstorms over the Rio Grande
Plains will continue to slowly shift eastward through the early
morning hours. We'll likely have a mix of VFR/MVFR ceilings through
15-16Z as convection throws a wrench in the forecast. Heavy
thunderstorms directly impacting terminals will cause reduced
visibility and potentially strong variable winds. VFR conditions
prevail by midday with variable winds becoming predominately out of
the southeast at around 10 knots in the afternoon.
&&
.MARINE...
Issued at 119 AM CDT Thu May 21 2026
Generally gentle to moderate E-SE winds will prevail through the
weekend over the waters. The main exception to this will be brief
periods of erratic and gusty winds (and elevated seas) in the
vicinity of thunderstorms. Thunderstorm chances remain high
(60-80%) today, Saturday and Sunday, with Friday have somewhat
lower rain chances (20-40%).
&&
.FIRE WEATHER...
Issued at 119 AM CDT Thu May 21 2026
No fire weather concerns through the week as moisture increases
and minimum RHs remain over 50% area-wide. Medium to high rain
chances (50-80%) are expected each day through Saturday. These
should be solid wetting rains with aerial totals in the 2 to 4
inch range through the weekend.
&&
.PRELIMINARY POINT TEMPS/POPS...
Corpus Christi 84 73 88 76 / 70 40 30 30
Victoria 81 70 86 72 / 70 40 50 20
Laredo 86 71 92 73 / 40 40 10 40
Alice 84 71 89 73 / 50 40 40 30
Rockport 86 77 89 78 / 80 40 30 20
Cotulla 84 69 90 72 / 40 40 10 40
Kingsville 83 72 88 74 / 60 30 40 30
Navy Corpus 84 77 87 79 / 70 40 30 30
&&
.CRP WATCHES/WARNINGS/ADVISORIES...
TX...Flood Watch through Monday evening for TXZ229>234-239>247-
342>347-442-443-447.
GM...None.
&&
DISCUSSION...NC/91
AVIATION...EMF/94In the hours before
Special weather statement, May 20, 11:12 PM CDT, 4 hours 47 minutes before
Special Weather Statement
National Weather Service Corpus Christi TX
1112 PM CDT Wed May 20 2026
TXZ239-240-210445-
Webb TX-Duval TX-
1112 PM CDT Wed May 20 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN DUVAL AND
SOUTHEASTERN WEBB COUNTIES THROUGH 1145 PM CDT...
At 1111 PM CDT, Doppler radar was tracking a strong thunderstorm near
Jim Hogg County Airport, or 7 miles west of Hebbronville, moving
north at 20 mph.
HAZARD...Wind gusts up to 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Oilton, Mirando City, and Bruni.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 2750 9903 2757 9874 2736 9867 2735 9880
2727 9880 2727 9891
TIME...MOT...LOC 0411Z 163DEG 18KT 2730 9881
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
EMFSpecial weather statement, May 21, 12:20 AM CDT, 3 hours 39 minutes before
Special Weather Statement
National Weather Service Corpus Christi TX
1220 AM CDT Thu May 21 2026
TXZ229-239-210545-
Webb TX-La Salle TX-
1220 AM CDT Thu May 21 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN LA SALLE AND
NORTHEASTERN WEBB COUNTIES THROUGH 1245 AM CDT...
At 1220 AM CDT, Doppler radar was tracking a strong thunderstorm 14
miles north of Ranchitos Las Lomas, or 17 miles southeast of Encinal,
moving north at 30 mph.
HAZARD...Wind gusts up to 40 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Encinal.
This includes Interstate 35 between mile markers 31 and 40.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 2775 9895 2773 9933 2806 9943 2809 9903
TIME...MOT...LOC 0520Z 168DEG 26KT 2785 9917
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH
EMFSpecial weather statement, May 21, 2:39 AM CDT, 1 hour 20 minutes before
Special Weather Statement
National Weather Service Corpus Christi TX
239 AM CDT Thu May 21 2026
TXZ239>241-210815-
Jim Wells TX-Webb TX-Duval TX-
239 AM CDT Thu May 21 2026
...STRONG THUNDERSTORMS WILL IMPACT SOUTHERN DUVAL...SOUTHEASTERN
WEBB AND SOUTHWESTERN JIM WELLS COUNTIES THROUGH 315 AM CDT...
At 239 AM CDT, Doppler radar was tracking a cluster of strong
thunderstorms along a line extending from 11 miles northeast of
Oilton to 8 miles northeast of Bruni to 6 miles north of Jim Hogg
County Airport to South Fork Estates to 6 miles east of
Thompsonville. Movement was east at 50 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Concepcion, Ramirez, Realitos, Rios, Cruz Calle, and Bruni.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 2726 9851 2727 9852 2734 9852 2734 9855
2736 9856 2736 9859 2734 9859 2734 9862
2736 9863 2735 9880 2727 9880 2727 9890
2743 9886 2754 9889 2768 9900 2762 9849
2739 9822 2726 9819
TIME...MOT...LOC 0739Z 291DEG 42KT 2762 9888 2754 9876 2743 9870 2726
9870 2721 9882
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
EMFThe office that day
Everything else NWS Corpus Christi, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 11:12 PM CDT | Special Weather Statement | CRP | Jim Hogg | 33 min |
| May 21, 12:20 AM CDT | Special Weather Statement | CRP | Webb | 25 min |
| May 21, 1:45 AM CDT | Flash Flood Warning | CRP | Webb | 2 hr |
| May 21, 2:39 AM CDT | Special Weather Statement | CRP | Duval | 36 min |
| May 21, 3:04 AM CDT | Severe Thunderstorm Warning | CRP | Duval, Jim Wells, Kleberg | 41 min |
| May 21, 3:10 AM CDT | Areal Flood Advisory | CRP | Duval, Webb | 3 hr |
| May 21, 3:25 AM CDT | Tornado Warning | CRP | Duval, Jim Wells, Kleberg | 27 min |
| May 21, 3:44 AM CDT | Severe Thunderstorm Warning | CRP | Duval, Jim Wells, Kleberg, Nueces | 46 min |
| May 21, 4:41 AM CDT | Flash Flood Warning | CRP | Duval, Jim Wells, Kleberg, Nueces | 3 hr |
| May 21, 4:51 AM CDT | Special Weather Statement | CRP | Kleberg, Nueces | 54 min |
| May 21, 5:08 AM CDT | Special Marine Warning | CRP | 97 min | |
| May 21, 5:18 AM CDT | Flash Flood Warning | CRP | Jim Wells, Nueces, San Patricio | 3 hr |
| May 21, 5:31 AM CDT | Special Weather Statement | CRP | Nueces | 44 min |
| May 21, 5:42 AM CDT | Flash Flood Warning | CRP | Kleberg, Nueces, San Patricio | 3 hr |
| May 21, 6:06 AM CDT | Special Marine Warning | CRP | 114 min | |
| May 21, 6:10 AM CDT | Severe Thunderstorm Warning | CRP | Aransas, Nueces, San Patricio | 50 min |
| May 21, 6:32 AM CDT | Areal Flood Advisory | CRP | Bee, Goliad, Refugio, San Patricio | 118 min |
| May 21, 6:53 AM CDT | Special Weather Statement | CRP | Aransas | 52 min |
| May 21, 7:05 AM CDT | Flash Flood Warning | CRP | Aransas, Calhoun, Refugio, Victoria | 3 hr |
| May 21, 7:22 AM CDT | Special Marine Warning | CRP | 83 min | |
| May 21, 8:10 AM CDT | Flash Flood Warning | CRP | Goliad, Refugio, Victoria | 3 hr |
Nearby
Flash Flood Warnings in Texas, 2026Every flash flood warning in 2026
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.