A short wave trough moved through the nearly zonal upper level flow and caused slow moving thunderstorms. These storms produced heavy rain and flash flooding over the southeastern portions of South Central Texas.
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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.
The episode as NWS EWX wrote it up.
A short wave trough moved through the nearly zonal upper level flow and caused slow moving thunderstorms. These storms produced heavy rain and flash flooding over the southeastern portions of South Central Texas.
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 Austin/San Antonio, TX wrote its last area forecast discussion before the first event at Mar 28, 2:51 PM CST, 54 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 351 PM CDT WED MAR 28 2012 .DISCUSSION... THE REMNANTS OF LAST NIGHTS MCS HAVE MADE IT TO THE EASTERN PART OF THE CWA AND ARE STARTING TO PRODUCE MORE THUNDERSTORMS IN A MODERATELY UNSTABLE ATMOSPHERE. PW IS BETWEEN 1 AND 1.5 INCHES IN THE SOUTHEASTERN PART OF THE AREA AND STORM MOTION IS SLOW...SO EXPECT SOME PLACES TO AS MUCH AS TWO INCHES OF RAIN THIS EVENING ACROSS THE SOUTHEAST. THESE STORMS SHOULD MOVE OFF TO THE EAST BY EARLY EVENING. THEN FOCUS WILL SHIFT BACK TO THE WEST WHERE STORMS ARE BEGINNING TO FORM OVER THE MOUNTAINS OF MEXICO. THESE STORMS SHOULD FOLLOW THE PATTERN OF THE LAST TWO NIGHTS AND MOVE ACROSS THE PLAINS INTO TX. THERE IS AN UPPER LEVEL SHORT WAVE WHICH CAN BE SEEN ON WV SAT IMAGERY IN NORTH CENTRAL MEXICO WHICH WILL CATCH UP TO THIS CONVECTION LATER THIS EVENING. THINKING IS THAT THIS FEATURE WILL ALLOW CONVECTION TO CONTINUE LATER AND FARTHER EAST THU MORNING. STORMS WILL PRODUCE SMALL HAIL AND HEAVY RAIN. HIGHEST RAINFALL WILL BE ACROSS THE RIO GRANDE PLAINS AS IT HAS BEEN THE PAST TWO NIGHTS. THE MAIN UPPER LEVEL TROUGH IS STILL EXPECTED TO MOVE ACROSS THE SOUTHERN PLAINS THU AND WE WILL CONTINUE TO CHANCES FOR SHOWERS AND THUNDERSTORMS THU AND FRI. AN UPPER LEVEL RIDGE WILL BUILD IN FOR THE WEEKEND...BRINGING DRY WEATHER AND WARMER TEMPS. MODELS ARE SHOWING SOME AGREEMENT ON A COLD FRONT FOR THE BEGINNING OF NEXT WORK WEEK. TIMING IS STILL A BIT DIFFERENT. THIS DIFFERENCE WILL HAVE A STRONG EFFECT ON TEMP FORECAST FOR MON AND TUE. HAVE LEANED TOWARD SLOWER ECMWF SOLUTION WITH FRONTAL PASSAGE AFTER MAX HEATING MON AND COOLER AIR ARRIVING TUE. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 64 79 65 81 65 / 30 20 30 30 20 AUSTIN BERGSTROM INTL AIRPORT 63 79 62 81 63 / 30 20 30 30 20 NEW BRAUNFELS MUNI AIRPORT 64 77 63 81 64 / 30 30 40 30 20 BURNET MUNI AIRPORT 62 79 63 81 63 / 30 20 20 20 20 DEL RIO INTL AIRPORT 67 84 65 88 66 / 60 20 40 10 20 GEORGETOWN MUNI AIRPORT 63 78 63 79 63 / 30 20 30 30 20 HONDO MUNI AIRPORT 65 79 65 83 64 / 30 40 40 20 20 SAN MARCOS MUNI AIRPORT 64 77 63 80 64 / 30 30 40 30 20 LA GRANGE - FAYETTE REGIONAL 64 77 64 78 64 / 30 30 40 30 20 SAN ANTONIO INTL AIRPORT 66 78 66 81 66 / 30 40 40 30 20 STINSON MUNI AIRPORT 66 78 66 82 65 / 30 40 40 30 20 && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && MESOSCALE/AVIATION...18 SYNOPTIC/GRIDS...05 PUBLIC SERVICE/DATA COLLECTION...22
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 355 PM CDT WED MAR 28 2012 TXZ171>173-183>194-202>209-217>225-228-291230- LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA- GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-BASTROP-LEE-KINNEY-UVALDE- MEDINA-BEXAR-COMAL-GUADALUPE-CALDWELL-FAYETTE-MAVERICK-ZAVALA- FRIO-ATASCOSA-WILSON-KARNES-GONZALES-DE WITT-LAVACA-DIMMIT- 355 PM CDT WED MAR 28 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT... LATE THIS AFTERNOON AND THIS EVENING....SCATTERED SHOWERS AND THUNDERSTORMS COULD PRODUCE LOCALLY HEAVY RAINFALL AMOUNTS ACROSS EASTERN PORTIONS OF SOUTH CENTRAL TEXAS...OR GENERALLY EAST OF A MOUNTAIN HOME TO SAN ANTONIO TO CAMPBELLTON LINE. LATER THIS EVENING INTO THE OVERNIGHT HOURS...ANOTHER ROUND OF THUNDERSTORMS IS EXPECTED TO MOVE OFF THE HIGHER ELEVATIONS OF MEXICO AND INTO WESTERN PORTIONS OF SOUTH CENTRAL TEXAS...OR GENERALLY WEST OF A ROCKSPRINGS TO CARRIZO SPRINGS LINE. ISOLATED 1 TO 2 INCH RAINS...SMALL HAIL...WIND GUSTS OVER 40 MPH...AND FREQUENT LIGHTNING CAN BE EXPECTED WITH ANY OF THESE STORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... ADDITIONAL SHOWERS AND THUNDERSTORMS WILL OCCUR ON THURSDAY AND FRIDAY. SOME OF THE STRONGER STORMS COULD REACH JUST BELOW SEVERE LEVELS WITH 1/2 INCH HAIL...GUSTY WINDS TO 40 MPH...AND HEAVY DOWNPOURS IN EXCESS OF ONE INCH. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 244 PM CDT WED MAR 28 2012 TXZ224-282030- DE WITT- 244 PM CDT WED MAR 28 2012 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL DEWITT COUNTY UNTIL 330 PM CDT... AT 242 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM NEAR YORKTOWN...MOVING NORTHEAST AT 10 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... CUERO... WESTHOFF... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 323 PM CDT WED MAR 28 2012 TXZ225-282115- LAVACA- 323 PM CDT WED MAR 28 2012 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LAVACA COUNTY UNTIL 415 PM CDT... AT 324 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 8 MILES SOUTHEAST OF YOAKUM...MOVING NORTHEAST AT 5 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... HALLETTSVILLE... EZZELL... KOERTH... SWEET HOME... MONT... WORTHING... WIED... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED ROADWAYS.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 345 PM CDT WED MAR 28 2012 TXZ207-223-282130- GONZALES-GUADALUPE- 345 PM CDT WED MAR 28 2012 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN GUADALUPE AND WESTERN GONZALES COUNTIES UNTIL 430 PM CDT... AT 344 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 9 MILES NORTH OF NIXON...OR 14 MILES NORTHEAST OF STOCKDALE...MOVING NORTH AT 10 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... PALMETO... LEESVILLE... BELMONT... MONTHALIA... OAK FOREST... OTTINE... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED ROADWAYS.
The national radar mosaic for the moment the first event began.
7 flash flood. Local standard time, as filed.
Slow moving thunderstorms produced heavy rain which caused flash flooding. Water covered the road in numerous locations along FM 1447 between Cuero and Terryville.
Slow moving thunderstorms produced heavy rain which caused flash flooding near Yoakum. There were numerous locations along FM 682 closed due to water over the road between Yoakum and Highway 77.
Slow moving thunderstorms produced heavy rain which caused flash flooding and closed Highway 181 at Calvert Avenue in Karnes City.
Slow moving thunderstorms produced heavy rain which caused flash flooding and closed FM 80 at FM 81 in Helena.
Slow moving thunderstorms produced heavy rain which caused flash flooding and closed parts of Highway 181 near Karnes City.
Slow moving thunderstorms produced heavy rain which caused flash flooding and closed parts of Highway 80 south of Helena.
Slow moving thunderstorms produced heavy rain which caused flash flooding and closed parts of Highway 791 near Campbellton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2012Every state in 2012This day in weather historyWarnings in Texas, March 2012
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: 366787, 366781, 366780, 366790, 366763, 366775, 366762.