An isolated thunderstorm formed over the hill country during the late afternoon along a weak temperature differential boundary.
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.
An isolated thunderstorm formed over the hill country during the late afternoon along a weak temperature differential boundary.
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 May 9, 2:31 PM CST, 3 hours 9 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 331 PM CDT FRI MAY 9 2008 .DISCUSSION... UPDATED PRODUCTS FOR SEVERE THUNDERSTORM WATCH 289. && .PREV DISCUSSION... /ISSUED 320 PM CDT FRI MAY 9 2008/ DISCUSSION... LATEST SURFACE OBSERVATIONS INDICATE A SHARP DIFFERENCE IN DEWPOINTS ACROSS THE HILL COUNTRY AND EDWARDS PLATEAU IN COMPARISON TO THE JUICY AIRMASS ALONG AND SOUTHEAST OF THE ESCARPMENT. WITH THE CONVERGENCE OF THIS DRYLINE AND WEAK FRONTAL BOUNDARY CONVERGING DURING MAX AFTERNOON HEATING...ISOLATED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND INTO THE EVENING. DESPITE THE SMALL NUMBER OF DISCRETE STORMS...ANY OF THESE STORMS WHICH DEVELOP MAY QUICKLY BECOME SEVERE. LARGE HAIL AND DAMAGING WINDS ARE THE PRIMARY CONCERNS. STORMS ARE EXPECTED TO DEVELOP FURTHER TO THE SOUTH AND EAST THROUGHOUT THE EVENT AS NEW CONVECTION POPS UP ALONG THE OUTFLOW BOUNDARY. ANOTHER HOT AFTERNOON IS IN STORE FOR SATURDAY WITH AFTERNOON TEMPERATURES PEAKING IN THE MID TO UPPER 90S ACROSS THE METRO AREA TO NEAR 105 IN THE VALLEY. ANOTHER ROUND OF CONVECTIVE ACTIVITY IS EXPECTED SATURDAY AFTERNOON INTO SATURDAY NIGHT AS THE APPROACHING WEAK COLD FRONT INTERSECTS THE DRYLINE LATE IN THE DAY. ONCE AGAIN...DUE TO THE TIMING OF THE BOUNDARIES INTERSECTING DURING MAX HEATING...WILL LIKELY SEE ANOTHER ROUND OF ISOLATED THUNDERSTORMS WHICH MIGHT BECOME SEVERE. SPC CURRENTLY HAS ONLY THE NORTHEASTERN- MOST TIER OF COUNTIES IN SLIGHT RISK FOR LATE SATURDAY. THE COLD FRONT WILL APPROACH THE COAST BY SUNDAY...HELPING TO BRING OUR TEMPERATURES BACK TO ONLY A FEW DEGREES ABOVE EARLY MAY NORMALS. A WARMING TREND IS IN STORE FOR THE BEGINNING OF THE WEEK AS NEARLY ZONAL FLOW ALOFT PREVAILS. MID-RANGE MODEL GUIDANCE INDICATES ANOTHER WEAK COLD FRONT WILL ENTER THE REGION ON WEDNESDAY. THIS SYSTEM WILL BRING THE NEXT BEST CHANCE FOR RAIN. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 73 95 66 86 59 / 20 20 10 - - AUSTIN BERGSTROM INTL AIRPORT 71 95 65 86 57 / 10 20 10 - - DEL RIO INTL AIRPORT 71 101 68 90 65 / - - - 10 - SAN ANTONIO INTL AIRPORT 72 96 67 87 62 / 10 - 10 - - && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && 25/05
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1252 PM CDT FRI MAY 9 2008 TXZ171>173-183>194-202>209-217>225-228-101800- 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- 1252 PM CDT FRI MAY 9 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT... THERE IS SLIGHT CHANCE FOR SEVERE THUNDERSTORMS IN THE NORTHEAST COUNTIES IN THE AREA EAST OF HWY 281 AND NORTH OF I10. THE GREATEST THREATS FROM THESE STORMS WILL BE LARGE HAIL AND STRONG WINDS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY... ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE NORTHEAST OF A BURNET TO SAN MARCOS TO HALLETTSVILLE LINE LATE SATURDAY AFTERNOON INTO EARLY SUNDAY MORNING. LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREATS. NO OTHER SEVERE WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON AND SATURDAY AFTERNOON.
The Austin/San Antonio radar (KEWX), 123 km away, was scanning. The volume nearest the first event began at 23:39 UTC.
5 thunderstorm wind, 1 hail. Local standard time, as filed.
Telephone lines and poles were reported blown down.
A barn was destroyed and one damaged on RR 3404.
Trees and power lines were reported down.
A roof was blown off a house.
A roof was blown off a house.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2008Every state in 2008This day in weather historyWarnings in Texas, May 2008
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: 102090, 102092, 102093, 102094, 102095, 102096.