Thunderstorms formed along an old outflow boundary in a moist, conditionally unstable airmass. Some of these storms produced heavy rain that led to flash flooding.
Every event with a place to put it. Tap one for its entry below.
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.
Thunderstorms formed along an old outflow boundary in a moist, conditionally unstable airmass. Some of these storms produced heavy rain that led to flash flooding.
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 Jun 19, 2:40 AM CST, 1 hour 13 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 340 AM CDT FRI JUN 19 2015 .SHORT TERM (TODAY THROUGH SATURDAY)... RAINFALL POTENTIAL SHOULD BE A BIT LESS THAN THE LAST COUPLE DAYS AS ONCE TROPICAL STORM BILL EXIT THE REGION. STILL QUITE A MOIST AIR MASS IS IN PLACE HOWEVER SO ISOLATED HEAVY RAINFALL WILL AGAIN BE POSSIBLE ACROSS SOUTH CENTRAL TEXAS. ALREADY THIS MORNING...SOME ISOLATED MODERATE RAIN SHOWERS ARE DEVELOPING AROUND BEXAR COUNTY WHICH APPEARS TO BE DRIVEN BY ISENTROPIC ASCENT. VAD WIND PROFILES AT CRP/EWX/DRT SHOW ONLY ABOUT 20 KTS OF 850 MB FLOW THIS MORNING AND SOME LOWER THETA E AIR APPEAR TO BE ADVECTING INTO THE AREA BY MID MORNING SAYS NAM/RAP FORECAST SOUNDINGS. THE ISENTROPIC ASCENT APPEARS TO WEAKEN BY MID MORNING AS WELL. THEREFORE...NOT EXPECTING THIS ACTIVITY TO PERSIST INTO THE AFTERNOON BUT AT THAT POINT...DIURNAL HEATING MAY TAKE OVER AS THE DOMINANT LIFTING MECHANISM SO CARRIED CHANCE POPS THROUGH 00Z. WV IMAGERY DEPICTS SOME DRIER AIR OVER THE FAR WESTERN COUNTIES THIS MORNING BUT ANOTHER SURGE OF MOISTURE UPSTREAM SHOULD MOVE IN THIS AFTERNOON IN ASSOCIATION WITH A WEAK LOW PRESSURE SYSTEM FROM THE MEXICAN PACIFIC COAST. IT WILL PARK ITSELF OVER THE RIO GRANDE VALLEY SATURDAY AND STAY SOMEWHAT STATIONARY INTO SUNDAY. THIS FEATURE WILL BE THE MAIN FOCUS FOR RAINFALL POTENTIAL THROUGH THE WEEKEND. && .LONG TERM (SATURDAY NIGHT THROUGH THURSDAY)... THE AFOREMENTIONED LOW PRESSURE SYSTEM WILL BECOME MORE OF AN INVERTED TROUGH AS IT BECOMES SANDWICHED BETWEEN A BUILDING HIGH OVER THE SW CONUS AND THE GULF OF MEXICO. IN THE LOWER LEVELS...A HEALTHY LLJ DEVELOPS OVER SOUTH TEXAS AND THE RIO GRANDE VALLEY PUMPING HEALTHY LOW LEVEL MOISTURE RIGHT INTO THE LOW CENTER. WITH FORECAST SOUNDINGS INDICATING PWATS OVER DEL RIO OVER 2 INCHES...A 30-40 KT LLJ...AND 1500-2500 J/KG OF SBCAPE...HEAVY RAIN CONTINUES TO LOOK POSSIBLE OVER THIS REGION. AS A RESULT...BUMPED UP QPF VALUES ALONG THE RIO GRANDE VALLEY TO ABOUT AN INCH SUNDAY THROUGH MONDAY MORNING. ALSO...AS OVERALL FLOW WILL BE WEAK ABOVE 700 MB...STORM MOTIONS SHOULD BE SLOW OR NEARLY STATIONARY...THEREFORE THINK ISOLATED POTENTIAL OF 3+ INCHES IS VALID. WILL ADDRESS THIS IN THE HWO. AFTER SUNDAY...THE TROUGH WILL BEGIN A TANGO WITH THE HIGH PRESSURE OVER THE SW EFFECTIVELY RETROGRADING THE TROUGH TO THE WEST AND THE HIGH BROADENING AND PUSHING EAST ACROSS THE CENTRAL PLAINS. THIS SHOULD CUT OFF THE MOISTURE INFLUX FOR A FEW DAYS. BY MID WEEK HOWEVER...THE PHASING OF THE TWO SYSTEM WILL RETURN FLOW TO THE SOUTHEAST AND RAIN CHANCES WILL RETURN TO THE SOUTHEAST CWA. HOWEVER...DONT FORESEE ANYTHING YET TO INDICATE THAT ANYTHING HAZARDOUS WILL BE IN THE FORECAST AT THIS TIME. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 90 73 88 74 89 / 20 10 20 20 30 AUSTIN BERGSTROM INTL AIRPORT 90 72 88 73 89 / 20 10 20 20 30 NEW BRAUNFELS MUNI AIRPORT 90 73 88 74 89 / 20 20 30 30 40 BURNET MUNI AIRPORT 91 72 87 73 88 / 10 10 20 20 20 DEL RIO INTL AIRPORT 89 73 87 73 88 / 20 30 30 40 50 GEORGETOWN MUNI AIRPORT 91 73 87 74 89 / 10 10 20 10 20 HONDO MUNI AIRPORT 88 73 86 73 87 / 30 20 30 30 40 SAN MARCOS MUNI AIRPORT 89 73 87 74 88 / 20 10 30 20 30 LA GRANGE - FAYETTE REGIONAL 90 74 89 75 90 / 20 10 40 20 20 SAN ANTONIO INTL AIRPORT 89 74 87 75 88 / 30 20 30 30 40 STINSON MUNI AIRPORT 88 74 88 75 89 / 30 20 40 30 40 && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && MESOSCALE/AVIATION...76 SYNOPTIC/GRIDS...TB3
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1107 AM CDT THU JUN 18 2015 TXZ171>173-183>194-202>209-217>225-228-191100- 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- 1107 AM CDT THU JUN 18 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT. A FLASH FLOOD WATCH IS IN EFFECT FOR LOCATIONS ALONG AND TO THE SOUTH OF HIGHWAY 90 AND EAST OF THE I-35 CORRIDOR. SHOWERS HAVE BEGUN TO DEVELOP THIS MORNING AND WILL LIKELY GROW IN COVERAGE AND STRENGTH THROUGH THE MID TO LATE MORNING AND INTO THE AFTERNOON. LOCALIZED HEAVY RAINFALL CAPABLE OF PRODUCING FLASH FLOODING WILL BE POSSIBLE. WHILE IT WILL BE DIFFICULT TO PINPOINT WHERE THE HEAVIEST DOWNPOURS WILL OCCUR IN THE WATCH AREA...LOCALIZED AMOUNTS COULD REACH 1 TO 3 INCHES QUICKLY WITH EVEN HIGHLY ISOLATED LOCATIONS RECEIVING 4 TO 5 INCHES. OVERALL STORM MOTION WILL BE SLOW. STRONGER THUNDERSTORMS COULD ALSO BE CAPABLE OF 40-50 MPH WINDS UNDER THE STRONGER PRECIPITATION DOWNBURSTS. STORM ACTIVITY SHOULD DECREASE THROUGH THE MID TO LATE EVENING HOURS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. SCATTERED SHOWERS AND THUNDERSTORMS SATURDAY AND ESPECIALLY SUNDAY COULD RESULT IN LOCALIZED FLASH FLOODING AS A MOIST AIRMASS RE-ESTABLISHES ITSELF AND A WEATHER DISTURBANCE REMAINS OVER THE RIO GRANDE VALLEY. THE MOST FAVORED LOCATIONS FOR POSSIBLE IMPACTS WILL BE CENTRAL AND WESTERN AREAS. PLEASE STAY TUNED FOR UPDATES FROM YOUR NATIONAL WEATHER SERVICE THIS WEEKEND OF THIS DEVELOPING SITUATION. SPOTTER ACTIVATION MAY BE NEEDED TODAY AND POSSIBLY OVER THE WEEKEND FOR FLASH FLOODING CONCERNS.
The Austin/San Antonio radar (KEWX), 33 km away, was scanning. The volume nearest the first event began at 09:53 UTC.
3 flash flood. Local standard time, as filed.
Thunderstorms produced heavy rain that caused flash flooding in northeast San Antonio. The fire department reported a water evacuation at 6900 N. Loop 1604 near Nacogdoches Rd.
Thunderstorms produced heavy rain that caused flash flooding along Salado Creek in San Antonio. The fire department reported a water rescue at Holbrook Rd. and Rittiman Rd.
Thunderstorms produced heavy rain that caused flash flooding along Maverick Creek in northwest San Antonio. The fire department reported a water rescue at Roadrunner Way and Jetlyn Dr. near the University of Texas at San Antonio campus.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2015Every state in 2015This day in weather historyWarnings in Texas, June 2015
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: 585578, 585577, 585581.