National Weather Service United States Department of Commerce

Heavy Rain and Severe Weather across South Texas - May 14-15th, 2010

On the morning of May 14th 2010, showers and thunderstorms began developing across South-Central Texas. These showers and thunderstorms were triggered by an upper level disturbance interacting with a stalled frontal boundary across the Hill Country along with abundant Gulf moisture and an unstable air mass. By noon, these showers and thunderstorms began to expand and move southeastward into northern portions of South Texas. An outflow boundary began to develop as the thunderstorms continued to merge and strengthen. This outflow boundary then pushed southward into the remainder of South Texas during the afternoon and evening hours on the 14th. The warm, moist and unstable conditions ahead of this outflow boundary produced heavy rain and isolated severe thunderstorms primarily across the northern portions of South Texas. This whole complex of storms weakened before midnight due to the loss of daytime heating.

A squall line developed in the early morning hours on the 15th across South-Central Texas. This squall line accelerated southeastward towards South Texas during the morning hours. This squall line reached the northern portions of South Texas by 400 AM CDT and exited the offshore waters by the early afternoon on the 15th. Strong winds up to 65 mph and heavy rain up to 7 inches fell.

These two thunderstorm events produced widespread flooding in the Victoria (where around 9 inches total fell) and Kingsville areas. Many creeks and streams spilled out of their banks in these two cities. The strong winds associated with this squall line produced downed power lines and tree limbs across portions of South Texas.

Radar Loops

KCRP Radar Reflectivity loop beginning at 1801 UTC on 05/14/10 and ending at 0317 UTC on 05/15/10. KCRP Radar Reflectivity loop beginning at 0800 UTC on 05/15/10 and ending at 1908 UTC on 05/15/10.

Satellite Loops

Visible Satellite loop beginning at 1800 UTC on 05/14/10 and ending at 0015 UTC on 05/15/10. Infrared Satellite loop beginning at 0700 UTC on 05/15/10 and ending at 1815 UTC on 05/15/10.

Rainfall

72 Hour Rainfall ending at 700 AM CDT on May 16th 2010

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

0412 PM     FLASH FLOOD      4 E TILDEN              28.45N 98.47W
05/14/2010                   MCMULLEN           TX   COUNTY OFFICIAL

            WATER OVER ROAD AT CR 308 AND CR 306...EAST OF TILDEN.

0918 PM     HAIL             7 SSE REALITOS          27.34N 98.49W
05/14/2010  E0.25 INCH       DUVAL              TX   PUBLIC

            PEA SIZE HAIL COVERED THE GROUND AT CR 260 AND CR 250.


0630 AM     TSTM WND DMG     TYNAN                   28.16N 97.73W
05/15/2010                   SAN PATRICIO       TX   PUBLIC

            TREE LIMBS WENT THROUGH HOUSE WALL.

0700 AM     FLASH FLOOD      VICTORIA                28.82N 96.98W
05/15/2010                   VICTORIA           TX   FIRE DEPT/RESCUE

            EM/FIRE CHIEF REPORTED STREET FLOODING COUNTY WIDE. 30-40
            PERCENT OF CITY STREETS IN VICTORIA ARE IMPASSABLE DUE TO
            FLOODING. VICTORIA FIRE DEPARTMENT HAS RESPONDED TO
            MULTIPLE CALLS OF FLOODING AND WATER RESCUES. WATER HAS
            BEEN REPORTED IN SEVERAL HOMES.

0700 AM     TSTM WND DMG     VICTORIA                28.82N 96.98W
05/15/2010                   VICTORIA           TX   TRAINED SPOTTER

            LARGE TREE LIMBS KNOCKED INTO THE SIDE OF THE HOUSE.

0700 AM     TSTM WND GST     VICTORIA                28.82N 96.98W
05/15/2010  E60.00 MPH       VICTORIA           TX   TRAINED SPOTTER

            APPROXIMATED WINDS OF 60 MPH REPORTED.

0743 AM     HEAVY RAIN       VICTORIA                28.82N 96.98W
05/15/2010  M6.41 INCH       VICTORIA           TX   TRAINED SPOTTER

            24 HOUR AMOUNT SINCE YESTERDAY MORNING.

0812 AM     HAIL             2 W KINGSVILLE          27.51N 97.89W
05/15/2010  E0.75 INCH       KLEBERG            TX   TRAINED SPOTTER

0812 AM     TSTM WND GST     2 W KINGSVILLE          27.51N 97.89W
05/15/2010  E65.00 MPH       KLEBERG            TX   TRAINED SPOTTER

0812 AM     FLASH FLOOD      2 W KINGSVILLE          27.51N 97.89W
05/15/2010                   KLEBERG            TX   TRAINED SPOTTER

            WIDE-SPREAD FLOODING. 1.82 INCHES FELL AT COUNTY
            COURTHOUSE. KING AVENUE AND 14TH STREET WERE BOTH
            FLOODED. SEVERAL MANHOLE COVERS CAME OFF WITH SEWAGE
            FLOWING INTO CITY STREETS.

0815 AM     HEAVY RAIN       INEZ                    28.88N 96.78W
05/15/2010  E7.80 INCH       VICTORIA           TX   AMATEUR RADIO

            MEASURED RAINFALL NOON MAY 14 TO 815 AM MAY 15

0829 AM     TSTM WND DMG     2 E RICARDO             27.42N 97.82W
05/15/2010                   KLEBERG            TX   TRAINED SPOTTER

            SEVERAL LARGE MESQUITE TREE LIMBS AND ONE FULL TREE WERE
            SNAPPED BY WINDS.

0829 AM     HEAVY RAIN       2 E RICARDO             27.42N 97.82W
05/15/2010  E3.00 INCH       KLEBERG            TX   TRAINED SPOTTER

            3 INCHES OF RAIN FELL IN ONE HOUR.

0830 AM     HEAVY RAIN       1 SW MISSION VALLEY     28.84N 97.16W
05/15/2010  M5.74 INCH       VICTORIA           TX   TRAINED SPOTTER

            5.74 INCHES OF RAIN MEASURED IN A 3 HOUR TIME SPAN

0832 AM     TSTM WND DMG     KINGSVILLE              27.51N 97.86W
05/15/2010                   KLEBERG            TX   EMERGENCY MNGR

            FEW TREES AND POWER LINES WERE BLOWN OVER.

0835 AM     HEAVY RAIN       CHOKE CANYON            28.51N 98.32W
05/15/2010  M4.00 INCH       LIVE OAK           TX   TRAINED SPOTTER

            24 HOUR AMOUNT ON THE NORTH END OF CHOKE CANYON DAM.

0845 AM     TSTM WND DMG     KINGSVILLE              27.51N 97.86W
05/15/2010                   KLEBERG            TX   TRAINED SPOTTER

            SEVERAL TREE LIMBS WERE KNOCKED DOWN ON THE WEST SIDE OF
            THE CITY.

0930 AM     FLASH FLOOD      KINGSVILLE              27.51N 97.86W
05/15/2010                   KLEBERG            TX   TRAINED SPOTTER

            TRANQUITAS CREEK IS OVERFLOWING AND MAKING 14TH AND 17TH
            STREETS IMPASSABLE.
Location Rainfall Amount
Victoria Guadulaupe 9.12
Victoria 14 W 8.36
Victoria 11 W 8.20
Victoria 2 S 7.74
Victoria 1 E 7.30
Bloomington 6.37
Inez 6.32
Victoria Airport ASOS 6.03
Coleto Creek 5.53
Three Rivers 4.88
Port Lavaca 4.70
Goliad 10 NE 4.26
Point Comfort 3.81
Goliad 2 E 3.59
Weser 3.05
Indianola 2.94
George West 8 NE 2.86
Kingsville 6 NE 2.25
Cross 2.09
Austwell 2.04
Whitsett 2.03
Beeville 12 NE 2.02
Mathis 2.00
Bishop 1.70
Aransas Pass 1.68
Loma Alta 1.60
Kingsville Navy 1.51
Fowlerton 1.36
Padre Island 1.04
Corpus Christi CWOP 1.00