National Weather Service United States Department of Commerce

South Texas Severe Weather, Heavy Rain, and Coastal Flooding Event - May 28th - 29th, 2017

Strong to severe thunderstorms with heavy rainfall and flooding impacted South Texas from the evening on May 28th, 2017 through the early morning hours on May 29th. After the storms moved offshore into the Gulf of Mexico, strong pressure falls were observed over South Texas, with strong pressure rises noted over the Gulf waters. This produced strong easterly winds across the Coastal Bend and adjacent waters. As a result, brief but significant coastal flooding occurred over portions of the Middle Texas coast. Below is a brief overview of how this event transpired.

During the afternoon of May 28th, 2017, thunderstorms began to develop over the Texas Hill Country along a frontal boundary, due to strong daytime heating and very unstable conditions. Also, an upper level disturbance aided the thunderstorm potential. As a result, strong to severe thunderstorms began to develop over the Brush Country by early that evening. Golf ball sized hail was reported over Northwest Webb County that evening.

By the early morning of May 29th, a line of thunderstorms with strong winds and heavy rainfall developed over the Brush Country. These storms moved eastward through the remainder of the Brush Country and into the Coastal Bend before 300 AM CDT. As these storms moved through Alice, the observing station at the airport reported 70 mph wind gusts. Along with the strong gusty winds, very heavy rainfall and flooding occurred as the storms moved into the cities of Kingsville and Corpus Christi. At times, the northern leading edge of the squall line was showing rotation, and tornado warnings were issued for portions of Duval and Kleberg County. As the storms approached the coast, Special Marine Warnings were issued for the southern Bays and nearshore waters. Widespread wind gusts of 40 to more than 60 mph were observed behind this line of thunderstorms.

Although the concern for severe weather and flooding ended when the storms moved into the Gulf waters, this event had one final episode. Due to the strong storms which moved through the area, pressures rapidly rose over the Brush Country while pressures fell rapidly over the Coastal Bend and Southeast TX. As the atmosphere attempted to adjust from this pressure rise/fall couplet, winds over the coastal areas increased dramatically. At 900 AM, a wind gust of 61 mph was reported at Port Aransas, with many other coastal areas experiencing wind gusts of 45 mph or more. Because of these strong onshore winds (occurring at the time close to high tide), tidal levels at Bob Hall Pier rose from around 1 foot MSL to nearly 3 feet MSL in about 2 hours! Because of this, coastal flooding was observed for a few hours near and south of the pier. Coastal Flood warnings and Gale warnings were issued for coastal areas and the Gulf waters due to these strong gradient winds. Finally, by the afternoon on the 29th, winds, seas, and tides had subsided and conditions over South Texas became more tranquil.

Radar loop beginning at 1045 PM CDT 5/28/17 and ending at 555 AM CDT 5/29/17.
Click image above to view the full-size image.
24-hour Observed Rainfall
COCORAHS PRECIPITATION SUMMARY
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1001 AM CDT MON MAY 29 2017

COCORAHS PRECIPITATION REPORTS
THESE REPORTS ARE CONSIDERED SUPPLEMENTAL AND UNOFFICIAL
VALUES ARE FOR THE PREVIOUS 24 HOURS ENDING AROUND 7 AM LOCAL TIME

.B CRP 0529 C DH07/PP/SF/SD/SW
:
:COCORAHS PRECIPITATION REPORTS IN SOUTH TEXAS
:
:                                               SNOW   SNOW  WATER
:                                        PCPN   FALL  DEPTH  EQUIV
:
TXAR08  : ARANSAS PASS 6.1 NNW     *   : 1.13 /  MM /   MM /   MM
TXLS06  : ARTESIA WELLS 14.0 SE    *   : 2.17 /  MM /   MM /   MM
TXRF05  : AUSTWELL 0.2 ESE         *   : 0.53 /  MM /   MM /   MM
TXRF02  : AUSTWELL 0.3 ESE         *   : 0.10 /  MM /   MM /   MM
TXBEE18 : BEEVILLE 9.0 S           *   : 0.21 /  MM /   MM /   MM
TXGD16  : BEEVILLE 12.6 NNE        *   : 0.19 /  MM /   MM /   MM
TXLO05  : CHOKE CANYON DAM NORTH SI*   : 0.36 /  MM /   MM /   MM
TXNU53  : CORPUS CHRISTI 3.4 WSW   *   : 4.77 /  MM /   MM /   MM
TXNU52  : CORPUS CHRISTI 4.8 SSE   *   : 4.59 /  MM /   MM /   MM
TXNU45  : CORPUS CHRISTI 6.7 WSW   *   : 4.33 /  MM /   MM /   MM
TXNU61  : CORPUS CHRISTI 6.9 SE    *   : 3.84 /  MM /   MM /   MM
TXNU07  : CORPUS CHRISTI 9.0 SSE   *   : 2.46 /  MM /   MM /   MM
TXNU15  : CORPUS CHRISTI 9.1 NW    *   : 3.11 /  MM /   MM /   MM
TXLS10  : COTULLA 4.3 SSE          *   : 1.80 /  MM /   MM /   MM
TXLO11  : GEORGE WEST 2.9 E        *   : 0.17 /  MM /   MM /   MM
TXLO12  : GEORGE WEST 8.0 NE       *   : 0.23 /  MM /   MM /   MM
TXGD06  : GOLIAD 0.4 NW            *   : 0.26 /  MM /   MM /   MM
TXGD03  : GOLIAD 2.4 SE            *   : 0.22 /  MM /   MM /   MM
TXGD08  : GOLIAD 4.1 NW            *   : 0.21 /  MM /   MM /   MM
TXGD27  : GOLIAD 6.5 WNW           *   : 0.33 /  MM /   MM /   MM
TXGD28  : GOLIAD 10.4 NE           *   : 0.27 /  MM /   MM /   MM
TXGD12  : GOLIAD 11.5 N            *   : 0.27 /  MM /   MM /   MM
TXGD25  : GOLIAD 14.3 NNE          *   : 0.47 /  MM /   MM /   MM
TXGD04  : GOLIAD 14.5 WNW          *   : 0.78 /  MM /   MM /   MM
TXDV01  : HEBBRONVILLE 13.6 E      *   : 3.61 /  MM /   MM /   MM
TXVC37  : INEZ 1.1 SSE             *   : 0.26 /  MM /   MM /   MM
TXKL02  : KINGSVILLE 6.5 SSE       *   : 2.56 /  MM /   MM /   MM
TXWB12  : LAREDO 1.8 N             *   : 1.40 /  MM /   MM /   MM
TXWB47  : LAREDO 2.5 N             *   : 1.31 /  MM /   MM /   MM
TXWB46  : LAREDO 4.5 NNW           *   : 2.43 /  MM /   MM /   MM
TXWB41  : LAREDO 8.4 NNW           *   : 1.51 /  MM /   MM /   MM
TXWB22  : LAREDO 23.7 ENE          *   : 0.30 /  MM /   MM /   MM
TXVC27  : NURSERY 0.4 NNW          *   : 0.65 /  MM /   MM /   MM
TXJW05  : ORANGE GROVE 4.3 SW      *   : 1.65 /  MM /   MM /   MM
TXNU12  : ORANGE GROVE 4.5 SE      *   : 1.05 /  MM /   MM /   MM
TXJW08  : PALITO BLANCO 1.0 ESE    *   : 3.93 /  MM /   MM /   MM
TXSP18  : PORTLAND 1.3 NW          *   : 2.61 /  MM /   MM /   MM
TXCLH16 : PORT LAVACA 6.0 SE       *   : 0.83 /  MM /   MM /   MM
TXAR05  : ROCKPORT 0.6 N           *   : 1.70 /  MM /   MM /   MM
TXAR03  : ROCKPORT 2.1 NNW         *   : 1.31 /  MM /   MM /   MM
TXAR06  : ROCKPORT 3.0 NNW         *   : 1.03 /  MM /   MM /   MM
TXCLH09 : SEADRIFT 0.6 E           *   : 0.90 /  MM /   MM /   MM
TXVC29  : VICTORIA 9.5 SW          *   : 0.18 /  MM /   MM /   MM
TXVC25  : VICTORIA 9.5 WSW         *   : 0.24 /  MM /   MM /   MM
TXVC20  : VICTORIA 9.7 ESE         *   : 0.82 /  MM /   MM /   MM
TXVC03  : VICTORIA 11.9 SE         *   : 0.47 /  MM /   MM /   MM
TXVC22  : VICTORIA 12.1 W          *   : 0.23 /  MM /   MM /   MM
TXVC21  : VICTORIA 14.0 SW         *   : 0.18 /  MM /   MM /   MM
TXGD15  : WESER 1.9 NW             *   : 0.22 /  MM /   MM /   MM
TXRF03  : WOODSBORO 3.6 S          *   : 0.39 /  MM /   MM /   MM
:
.END
Preliminary, non-operational data.
Satellite Loop
Infrared Satellite loop beginning at 245 PM CDT on 05/28/17 and ending at 630 AM CDT on 05/29/17.
Click image above to view the full-size image.
Public Information Statement
National Weather Service Corpus Christi TX
1225 PM CDT Mon May 29 2017

...Wind Reports Past 6 Hours...

Location                     Speed     Time/Date       Lat/Lon
14 ENE Fulton                57 MPH    0912 AM 05/29   28.12N/96.80W
7 SE Flour Bluff             55 MPH    0806 AM 05/29   27.58N/97.22W
Corpus Christi Nas           52 MPH    0746 AM 05/29   27.70N/97.28W
3 S Flour Bluff              52 MPH    0757 AM 05/29   27.60N/97.30W
4 ESE Flour Bluff            51 MPH    0812 AM 05/29   27.63N/97.24W
3 WNW Corpus Christi         50 MPH    0745 AM 05/29   27.72N/97.34W
4 N Fulton                   49 MPH    0800 AM 05/29   28.13N/97.03W
8 SE Aransas Pass            48 MPH    0815 AM 05/29   27.84N/97.05W
8 SE Aransas Pass            48 MPH    0800 AM 05/29   27.83N/97.05W
Port Aransas                 48 MPH    0835 AM 05/29   27.81N/97.09W
Aransas County Airport       48 MPH    0823 AM 05/29   28.09N/97.04W
18 E Loyola Beach            46 MPH    0748 AM 05/29   27.30N/97.40W
7 SE Aransas Pass            44 MPH    0830 AM 05/29   27.84N/97.07W
2 NW Seadrift                44 MPH    0854 AM 05/29   28.41N/96.71W
Portland                     44 MPH    0740 AM 05/29   27.87N/97.32W
10 SE Chapman Ranch          42 MPH    0836 AM 05/29   27.48N/97.32W
6 SSE Austwell               41 MPH    0859 AM 05/29   28.30N/96.82W
56 SE Seadrift               39 MPH    0735 AM 05/29   27.84N/96.01W

Observations are collected from a variety of sources with varying
equipment and exposures. Not all data listed are considered official.
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
154 PM CDT MON MAY 29 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0712 PM     HAIL             7 W LA ESPERANZA RANCH  28.07N  99.69W
05/28/2017  E1.75 INCH       WEBB               TX   SOCIAL MEDIA

            SOCIAL MEDIA REPORT WITH PICTURE OF GOLF BALL HAIL

1115 PM     LIGHTNING        6 SE GARDENDALE         28.46N  99.14W
05/28/2017                   LA SALLE           TX   FIRE DEPT/RESCUE

            LIGHTNING CAUSED A FIRE AT A STORAGE FACILITY ALONG
            HIGHWAY 97.

0212 AM     TSTM WND GST     2 SE ALICE              27.74N  98.04W
05/29/2017  M70 MPH          JIM WELLS          TX   ASOS

            MEASURED BY KALI ASOS

0224 AM     TSTM WND GST     2 SE ALICE              27.74N  98.04W
05/29/2017  M62 MPH          JIM WELLS          TX   ASOS

            ADDITIONAL SEVERE WIND GUST MEASURED AT KALI

0230 AM     FLASH FLOOD      KINGSVILLE              27.51N  97.86W
05/29/2017                   KLEBERG            TX   TRAINED SPOTTER

            WATER COVERING THE ROADS IN PORTIONS OF KINGSVILLE

0254 AM     MARINE TSTM WIND 7 ENE BAFFIN BAY        27.30N  97.40W
05/29/2017  M43 MPH          GMZ230             TX   MESONET

            BAFFIN BAY TCOON SITE MEASURED A GUST TO 37 KNOTS.

0300 AM     MARINE TSTM WIND 1 S PORTLAND            27.87N  97.32W
05/29/2017  M48 MPH          GMZ230             TX   MESONET

            WEATHERFLOW SITE AT SUNSET LAKE PARK IN PORTLAND
            MEASURED A GUST TO 42 KNOTS.

0300 AM     MARINE TSTM WIND 4 NNE CORPUS CHRISTI IN 27.83N  97.49W
05/29/2017  M44 MPH          GMZ230             TX   MESONET

            NUECES BAY TCOON SITE MEASURED A GUST TO 38 KNOTS.

0318 AM     MARINE TSTM WIND 4 NNE CORPUS CHRISTI IN 27.83N  97.49W
05/29/2017  M60 MPH          GMZ230             TX   MESONET

            NUECES BAY TCOON SITE MEASURED TSTM GUST OF 52 KTS

0318 AM     MARINE TSTM WIND 3 NNW MALAQUITE BEACH   27.48N  97.32W
05/29/2017  M55 MPH          GMZ230             TX   MESONET

            SOUTH BIRD ISLAND TCOON MEASURED A GUST TO 48 KNOTS.

0320 AM     FLASH FLOOD      1 NE CORPUS CHRISTI COU 27.71N  97.37W
05/29/2017                   NUECES             TX   EMERGENCY MNGR

            FLOOD WATERS COVERED THE ROADWAYS ALONG SPID AT
            EVERHART AND STAPLES ROADS.

0324 AM     FLASH FLOOD      4 W FLOUR BLUFF         27.65N  97.37W
05/29/2017                   NUECES             TX   EMERGENCY MNGR

            CIMARRON AND AIRLINE ROADS IMPASSABLE ALONG WITH
            PORTIONS OF RODD FIELD ROAD.

0348 AM     MARINE TSTM WIND PADRE BALLI PARK        27.58N  97.22W
05/29/2017  M60 MPH          GMZ250             TX   NOS

            BOB HALL PIER MEASURED GUST OF 60 MPH WITH SUSTAINED
            SPEED OF 52 MPH.

0746 AM     TSTM WND GST     CORPUS CHRISTI NAS      27.69N  97.29W
05/29/2017  M52 MPH          NUECES             TX   ASOS

            ASOS AT NAS CORPUS CHRISTI MEASURED 52 MPH WINDS.

0900 AM     NON-TSTM WND GST 1 E PORT ARANSAS        27.83N  97.05W
05/29/2017  M61 MPH          GMZ250             TX   C-MAN STATION

            PORT ARANSAS NDBC STATION REPORTED 53 KTS WINDS.
Bob Hall Pier North Padre Island North Padre Island North Padre Island North Padre Island
Click images below to view the full-size image.
250 MB - 12Z 05/28 250 MB - 00Z 05/29 250 MB - 12Z 05/29
300 MB - 12Z 05/28 300 MB - 00Z 05/29 300 MB - 12Z 05/29
500 MB - 12Z 05/28 500 MB - 00Z 05/29 500 MB - 12Z 05/29
700 MB - 12Z 05/28 700 MB - 00Z 05/29 700 MB - 12Z 05/29
850 MB - 12Z 05/28 850 MB - 00Z 05/29 850 MB - 12Z 05/29
925 MB - 12Z 05/28 925 MB - 00Z 05/29 925 MB - 12Z 05/29
KCRP Skew-T - 12Z 05/28 KCRP Skew-T - 00Z 05/29 KCRP Skew-T - 12Z 05/29