A weather disturbance passing by to the north helped in the initiation of powerful supercell storms over Zapata County. These storms produced giant hail over rural sections of the county.
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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 BRO wrote it up.
A weather disturbance passing by to the north helped in the initiation of powerful supercell storms over Zapata County. These storms produced giant hail over rural sections of the county.
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 Brownsville, TX wrote its last area forecast discussion before the first event at Apr 30, 6:31 PM CST, 1 hour 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BROWNSVILLE TX 731 PM CDT MON APR 30 2007 .DISCUSSION...A TORNADO WATCH REMAINS IN EFFECT FOR AREAS JUST NORTH OF THE RIO GRANDE VALLEY UNTIL 10 PM. SEVERE TORNADIC THUNDERSTORMS HAVE PERSISTED IN NORTHERN AND CENTRAL DUVAL COUNTY EARLY THIS EVENING...AND THESE DANGEROUS THUNDERSTORMS HAVE BEEN DRIFTING SLOWLY SOUTH TOWARD NORTHERN JIM HOGG AND ZAPATA COUNTIES. THE ATMOSPHERE REMAINS VERY SUPPORTIVE FOR THE PERSISTENCE OF THESE THUNDERSTORMS. LIFT AND INFLOW ALONG THE OUTFLOW BOUNDARIES ASSOCIATED WITH THE THUNDERSTORM DEVELOPMENT SHOULD LEAD TO RENEWED UPDRAFT AND MIGRATION TO PORTIONS OF THE UPPER RIO GRANDE VALLEY. IN ADDITION TO THE TORNADO THREAT FROM THESE STORMS...VERY LARGE HAIL AND EXTREME RAINFALL TOTALS ARE ALSO POSSIBLE. AT THIS TIME...THE THUNDERSTORMS REMAIN ABOUT 30 MILES NORTH OF ZAPATA AND JIM HOGG COUNTIES MOVING SOUTH AT 10 MPH. CONTINUE TO MONITOR NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION OR YOUR LOCAL CABLE OUTLET FOR THE LATEST INFORMATION CONCERNING THESE THUNDERSTORMS APPROACHING OUR NORTHERN REGION. HAVE ADJUSTED ZNS TO REFLECT CURRENT TSTM TRENDS AND PROBABLE AREA OF +TSRA. && .PREV DISCUSSION AT 131 PM... THUNDERSTORMS ASSOCIATED WITH THIS MORNINGS MCS CONTINUE TO MOVE THROUGH SOUTH CENTRAL TEXAS THIS AFTERNOON...WITH ACTIVITY CURRENTLY STAYING NORTH OF CRP AREA. TEMPERATURES IN THE UPPER VALLEY REACHING NEAR 90 RIGHT NOW...WHILE THE LOWER VALLEY IS STUCK UNDER A STUBBORN CLOUD DECK. WESTERN SECTIONS WILL CONTINUE TO DESTABILIZE...AND LIKELY WAIT FOR SOME TYPE OF TRIGGER TO MOVE IN FRO THE NORTH. STARTING TO SEE A FEW CLOUDS STREAKS OFF THE MOUNTAINS TO THE SOUTHWEST...SO SOME OROGRAPHIC INITIATION IS PRETTY CLOSE. SPC HAS AREAS WEST OF US 281 IN THE SLIGHT RISK TODAY. THE EASTERN REGIONS WILL SEE LESS OF A THREAT DUE TO AFOREMENTIONED CLOUD COVER AND CAPPING AND REDUCED DAYTIME HEATING. THUNDERSTORM CHANCES WILL CONTINUE THROUGH THE OVERNIGHT HOURS...WITH THE BIGGEST THREAT REMAINING NORTH OF THE VALLEY. SOME THUNDERSTORMS ARE POSSIBLE AGAIN TOMORROW...BUT THE UPPER LEVEL DYNAMICS WILL BE FARTHER NORTH AND WILL HAVE TROUBLE REACHING DEEP SOUTH TEXAS. THE UPPER LOW WILL MOVE TO THE NORTHEAST BY WEDNESDAY...AND WILL BE REPLACED WITH WEAK RIDGING. THIS AND DRIER AIR ALOFT WILL KEEP PRECIPITATION AT BAY AND ALLOW TEMPS TO GRADUALLY INCREASE THROUGH THE WEEKEND...REACHING 5 TO 7 DEGREES ABOVE NORMAL. && .MARINE...MODERATE SOUTHEAST WINDS WILL CONTINUE FOR THE NEXT SEVERAL DAYS AS SURFACE LOW PRESSURE OVER MEXICO INTERACTS WITH HIGH PRESSURE OVER THE GULF TO MAINTAIN THE TIGHT PRESSURE GRADIENT. SMALL CRAFT ADVISORIES ARE LIKELY FOR THE LAGUNA MADRE AGAIN TUESDAY. SHOWERS AND THUNDERSTORMS REMAIN POSSIBLE THROUGH THURSDAY AS A SLOW MOVING UPPER LOW MOVES ACROSS NORTH TEXAS. && .AVIATION...BREEZY SE WINDS WILL DECOUPLE OVERNIGHT WITH LLJ ADVECTING IN MVFR CIGS. AND GUSTY SOUTHEAST SURFACE WINDS WILL PERSIST THIS AFTERNOON AND WILL RETURN TUESDAY AFTERNOON. MVFR CIGS WILL LIFT AND SCT BY LATE AM AND WINDS WILL MIX DOWN WITH SE WINDS 20G30KTS BY AFTERNOON WITH ISOLD SHRA/TSRA PRODUCING TEMPO MVFR TO IFR CIGS/VIS. && .PRELIMINARY POINT TEMPS/POPS... BAYVIEW/PORT ISABEL 74 86 75 87 / 20 20 10 10 BROWNSVILLE 74 88 74 88 / 20 20 10 10 HARLINGEN 72 88 73 91 / 20 20 10 10 MCALLEN 73 91 74 93 / 20 20 10 10 RIO GRANDE CITY 74 93 74 95 / 20 20 10 10 SOUTH PADRE ISLAND 75 82 74 84 / 20 20 10 10 && .BRO WATCHES/WARNINGS/ADVISORIES... SCA GMZ130-132-135 THROUGH 7 PM. && THIS PRODUCT IS ALSO AVAILABLE ON OUR INTERNET WEB PAGE AT: HTTP://WWW.SRH.NOAA.GOV/BRO 58/55/MARTINEZ
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE BROWNSVILLE TX 745 PM CDT MON APR 30 2007 TXZ248>257-011200- ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY- INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON- 745 PM CDT MON APR 30 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR DEEP SOUTH TEXAS. .DAY ONE...REMAINDER OF TONIGHT. THERE IS A RISK OF SEVERE THUNDERSTORMS FOR ZAPATA...JIM HOGG AND BROOKS COUNTIES THROUGH MIDNIGHT. THE MAIN THREAT IS LARGE HAIL AND HEAVY RAINFALL...WITH SOME OF THESE SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR WESTERN PORTIONS OF DEEP SOUTH TEXAS TUESDAY. RIP CURRENT RISK MAY INCREASE TO MODERATE ON TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE TONIGHT AND TUESDAY...ESPECIALLY FOR THE NORTHERN COUNTIES OF THE RIO GRANDE VALLEY. SPOTTERS AND EMERGENCY MANAGERS SHOULD STAY TUNED TO DEVELOPING WEATHER. PHILO
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BROWNSVILLE TX 649 PM CDT MON APR 30 2007 TXZ248>251-010045- JIM HOGG TX-ZAPATA TX-BROOKS TX-KENEDY TX- 649 PM CDT MON APR 30 2007 ...A TORNADO WATCH IS IN EFFECT JUST NORTH OF THE THE RIO GRANDE VALLEY... ...STRONG TORNADIC THUNDERSTORMS WITH LARGE HAIL CONTINUE TO DRIFT SOUTH TOWARD JIM HOGG...ZAPATA AND BROOKS COUNTIES... A TORNADO WATCH REMAINS IN EFFECT FOR AREAS JUST NORTH OF THE RIO GRANDE VALLEY UNTIL 10 PM. SEVERE TORNADIC THUNDERSTORMS HAVE PERSISTED IN NORTHERN AND CENTRAL DUVAL COUNTY EARLY THIS EVENING...AND THESE DANGEROUS THUNDERSTORMS HAVE BEEN DRIFTING SLOWLY SOUTH TOWARD NORTHERN JIM HOGG AND ZAPATA COUNTIES. THE ATMOSPHERE REMAINS VERY SUPPORTIVE FOR THE PERSISTENCE OF THESE THUNDERSTORMS. LIFT AND INFLOW ALONG THE OUTFLOW BOUNDARIES ASSOCIATED WITH THE THUNDERSTORM DEVELOPMENT SHOULD LEAD TO RENEWED UPDRAFT AND MIGRATION TO PORTIONS OF THE UPPER RIO GRANDE VALLEY. IN ADDITION TO THE TORNADO THREAT FROM THESE STORMS...VERY LARGE HAIL AND EXTREME RAINFALL TOTALS ARE ALSO POSSIBLE. AT THIS TIME...THE THUNDERSTORMS REMAIN ABOUT 40 MILES NORTH OF ZAPATA AND JIM HOGG COUNTIES MOVING SOUTH AT 10 MPH. CONTINUE TO MONITOR NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION OR YOUR LOCAL CABLE OUTLET FOR THE LATEST INFORMATION CONCERNING THESE THUNDERSTORMS APPROACHING OUR NORTHERN REGION. PHILO PHILO
The Corpus Christi radar (KCRP), 159 km away, was scanning. The volume nearest the first event began at 01:44 UTC.
2 hail. Local standard time, as filed.
A trained SKYWARN weather spotter reported hail to the size of golf balls.
A trained SKYWARN spotter reported hail from quarter to baseball size.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2007Every state in 2007This day in weather historyWarnings in Texas, April 2007
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: 29068, 29069.