A weak front/boundary pushed south across south Texas during the day of the 27th. While moisture was limited, there was just enough boundary layer moisture pooling along the front and a bit of extra forcing for a few showers and thunderstorms to fire as it moved across the northern and far western portions of the CWA.
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 BRO wrote it up.
A weak front/boundary pushed south across south Texas during the day of the 27th. While moisture was limited, there was just enough boundary layer moisture pooling along the front and a bit of extra forcing for a few showers and thunderstorms to fire as it moved across the northern and far western portions of the CWA. One storm became severe during the late afternoon and early evening hours over San Ygnacio in far western Zapata County. A downburst struck the small town and caused damage to the roofs of several homes, a small business, and a number of trailers were blown over at the San Ygnacio RV Park.
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 Jul 27, 1:56 PM CST, 2 hours 20 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
256 PM CDT SAT JUL 27 2013
.SHORT TERM /NOW THROUGH SUNDAY NIGHT/...
A WEAK FRONT HAS MADE LITTLE PROGRESS SOUTHWARD TODAY...AND REMAINS
ALMOST STATIONARY NEAR A LAREDO...TO SAN ANTONIO...TO HOUSTON LINE
AT EARLY AFTERNOON. RADARS ACROSS SOUTH TEXAS SHOW AN ISOLATED
SMATTERING OF SHOWERS IN VICINITY OF THE FRONT...THANKS TO THE
POOLING OF BOUNDARY LAYER MOISTURE AND A BIT OF EXTRA FORCING.
OUR CORNER OF THE WORLD REMAINS BASICALLY HOT AND DRY. AND WITH THE
UPPER-LEVEL WEATHER PATTERN LOCKED INTO THIS RIDGE WEST/TROUGH EAST
PATTERN...IT DOESN/T LOOK LIKE THERE IS MUCH HOPE FOR THIS FRONT TO
MAKE IT INTO OUR AREA AS OUR AREA AS IT DRIFTS SOUTHWARD. THERE IS
STILL THE OUTSIDE POSSIBILITY OF A ROGUE SHOWER THROUGH
SUNSET...MAINLY ACROSS NORTHWESTERN AND NORTHERN PARTS OF THE
FORECAST AREA. ANY CONVECTION IN OUR AREA WOULD LIKELY COME FROM
SHOWERS WHICH DEVELOP AND WEAKEN AS THEY MOVE SOUTHWARD FROM
WEBB...DUVAL...AND JIM WELLS COUNTIES. PROBABILITIES HAVE BEEN KEPT
AROUND 15 PERCENT THROUGH SUNSET.
ISOLATED SHOWER ACTIVITY SHOULD DISSIPATE TOWARD SUNSET AS WE LOSE
DAYTIME HEATING...LEAVING US WITH DRY CONDITIONS ACROSS THE REGION.
OVER THE NEXT 24 HOURS OR SO...THE FRONT EXPECTED TO GRADUALLY
DISSIPATE AS UPPER RIDGING REBUILDS OVER THE REGION. THIS WILL
ALLOW WEATHER CONDITIONS TO REMAIN ON THE DRY AND TOASTY SIDE
THROUGH THE END OF THE WEEKEND.
GIVEN THE DRY SOIL CONDITIONS AND INCREASED SUBSIDENCE ALOFT...I
HAVE HIGH CONFIDENCE THAT AFTERNOON HIGHS SHOULD REMAIN ABOVE NORMAL
FOR LATE JULY. THE ONGOING SHORT TERM TEMPERATURE FORECAST APPEARS
TO BE IN THE BALLPARK...WITH ONLY A MINOR TWEAK HERE AND THERE BASED
ON THE LATEST GUIDANCE. /BUTTS/
.LONG TERM....LONG TERM /MONDAY THROUGH SATURDAY...LITTLE TO NO
CHANGE IN THE STAGNANT WEATHER PATTERN. 12Z MODEL SUITE REMAINS
STEADY STATE WITH SUBTROPICAL RIDGE WELL ESTABLISHED ACROSS THE
SOUTHERN TIER OF THE US AND NORTHERN MEXICO. THE CENTER OF THE
HIGH TO SLOSH WEST TO EAST AND BACK FROM THE FOUR CORNERS REGION
TO EAST TEXAS WITH THE RIDGE AXIS TO REMAIN WELL ANCHORED WHILE
DRIFTING GRADUALLY NORTHWARD BY THE END OF THE FORECAST PERIOD. IF
THE RIDGE AXIS DOES IN DEED DRIFT FAR ENOUGH NORTH THIS COULD OPEN
THE DOOR FOR A DEEPER EASTERLY FLOW WHICH MIGHT RESULT IN THE
INCREASE OF RAIN CHANCES LATE NEXT WEEKEND INTO EARLY NEXT WEEK.
OTHERWISE...LOOK FOR HOT AND BREEZY CONDITIONS TO PERSIST WITH
SOME WEAKER WINDS WED-SAT. TEMPERATURES TO HOVER 3 TO 5 DEGREES
ABOVE NORMAL BOTH DURING THE DAY AND NIGHT. GFS HAS BEEN
PERSISTENT IN TRACKING A WEAK INVERTED TROUGH CROSS THE BAY OF
CAMPECHE TUESDAY NIGHT WHILE THE ECMWF SHOWS A SIMILAR LOOKING
WAVE. 500-1000MB LAYER SHOWS SOME INCREASE OF MOISTURE CLIPPING
THE SOUTHERN COASTAL WATERS. SOUTHERLY WIND TRAJECTORY AND SPEED
OF WINDS MAY RESULT IN SOME STREAMERS OVER THE UNSTABLE WATERS
OVERNIGHT TUESDAY INTO EARLY WEDNESDAY. THEN AS MENTIONED ABOVE
500MB RIDGE GRADUALLY DRIFTS NORTH AS WE HEAD INTO NEXT WEEKEND.
ANOTHER WEAK WAVE...MAYBE THE REMNANTS OF DISINTEGRATING
DORIAN..DEPICTED BY THE 12Z GFS WITH THE ECMWF SHOWING A STRONGER
SIGNAL APPROACHES THE WESTERN GULF WITH SOME INCREASE IN MOISTURE.
THIS WILL WARRANT THE MENTION OF ISOLATED STREAMER SHOWERS OVER
THE COASTAL WATERS FRIDAY AND SATURDAY NIGHT. NOTHING INLAND AT
THIS POINT WITH THE WAVE AXIS TO THE EAST OF THE COASTLINE. HANG
IN THERE WERE ARE HEADING INTO THE BEGINNING OF OUR WETTEST PERIOD
OF THE SEASON WITHIN A FEW WEEKS.
&&
.MARINE...TONIGHT THROUGH SUNDAY NIGHT...
GUSTY /MOSTLY/ SOUTH WINDS WILL REMAIN THE PRIMARY WEATHER IMPACT
OVER THE MARINE AREA THROUGH THE SHORT TERM PORTION OF THE
FORECAST. DECREASED MECHANICAL MIXING AFTER SUNSET SHOULD ALLOW
WIND SPEEDS TO DIMINISH A BIT TONIGHT /EVEN IF DOWN TO SMALL CRAFT
EXERCISE CAUTION LEVELS/...AND WILL PLAN ON ALLOWING EXPIRATION OF
THE SMALL CRAFT ADVISORY TO OCCUR AT 6 PM. ANOTHER SMALL CRAFT
ADVISORY MAY BE NEEDED SUNDAY OVER THE LAGUNA MADRE...THANKS TO A
CONTINUED STRONG PRESSURE GRADIENT.
MONDAY THROUGH THURSDAY...STEADY STATE MARINE CONDITIONS TO
PERSIST WITH LITTLE DAY TO DAY VARIATION. WINDS AND SEAS TO START
OUT THE HIGHEST MONDAY THEN TREND DOWNWARD AS SURFACE AND MID
LEVEL HIGH PRESSURE BUILD BECOME ESTABLISHED OVER THE WESTERN
GULF. MARINERS CAN EXPECT STRONGER DIURNAL DRIVEN WINDS OVER THE
LAGUNA MADRE DURING THE DAY AND ACROSS THE OPEN GULF WATERS
OVERNIGHT. AN ISOLATE STREAMER SHOWERS COULD SHOW TUESDAY NIGHT
AND AGAIN FRIDAY AS WEAK DISTURBANCES PASSES EAST TO WEST ACROSS
THE BAY OF CAMPECHE.
&&
.PRELIMINARY POINT TEMPS/POPS...
BAYVIEW/PORT ISABEL 79 93 80 94 / 10 10 0 0
BROWNSVILLE 79 95 78 96 / 10 10 0 0
HARLINGEN 78 99 77 99 / 10 0 0 0
MCALLEN 79 100 79 101 / 10 0 0 0
RIO GRANDE CITY 79 101 79 103 / 10 10 0 0
SOUTH PADRE ISLAND 80 89 79 90 / 10 10 0 0
&&
.BRO WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...SMALL CRAFT ADVISORY FOR WINDS UNTIL 6 PM CDT THIS EVENING FOR
GMZ130-132-135.
&&
THIS PRODUCT IS ALSO AVAILABLE ON THE WEB AT:
HTTP://WEATHER.GOV/RGV
53...SHORT TERM
59...LONG TERM
MARTINEZ...GRAPHICASTSHAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE BROWNSVILLE TX 1117 AM CDT SAT JUL 27 2013 TXZ248>257-281630- ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY- INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON- 1117 AM CDT SAT JUL 27 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR DEEP SOUTH TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT. THUNDERSTORM IMPACT... ISOLATED THUNDERSTORMS WILL BE POSSIBLE LATE THIS AFTERNOON THROUGH EARLY THIS EVENING ALONG AND NORTH OF A LINE FROM ZAPATA TO SARITA. HEAT IMPACT... HEAT INDEX VALUES BETWEEN 105 AND 109 DEGREES ARE EXPECTED THIS AFTERNOON. COASTAL IMPACT... THERE IS A MODERATE RISK OF RIP CURRENTS AT THE BEACHES OF SOUTH PADRE ISLAND AND BOCA CHICA BEACH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. HEAT IMPACT... HEAT INDEX VALUES IN EXCESS OF 101 DEGREES WILL BE POSSIBLE ACROSS THE REGION THROUGH MUCH OF THE UPCOMING WEEK. COASTAL IMPACT... AN ELEVATED RISK OF RIP CURRENTS WILL BE POSSIBLE AT THE BEACHES OF SOUTH PADRE ISLAND AND BOCA CHICA BEACH THROUGH TUESDAY. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF STORM SPOTTER GROUPS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL WILL NOT BE NEEDED. GMZ130-132-135-150-155-170-175-281630- LAGUNA MADRE FROM THE PORT OF BROWNSVILLE TO THE ARROYO COLORADO- LAGUNA MADRE FROM THE ARROYO COLORADO TO 5 NM NORTH OF PORT MANSFIELD TX- LAGUNA MADRE FROM 5 NM NORTH OF PORT MANSFIELD TO BAFFIN BAY TX- COASTAL WATERS FROM PORT MANSFIELD TO THE RIO GRANDE OUT 20 NM- COASTAL WATERS FROM BAFFIN BAY TO PORT MANSFIELD OUT 20 NM- WATERS FROM PORT MANSFIELD TO THE RIO GRANDE EXTENDING FROM 20 TO 60 NM- WATERS FROM BAFFIN BAY TO PORT MANSFIELD EXTENDING FROM 20 TO 60 NM- 1117 AM CDT SAT JUL 27 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE GULF OF MEXICO AND THE LAGUNA MADRE. .DAY ONE...THIS AFTERNOON AND TONIGHT. MARINE IMPACT... A SMALL CRAFT ADVISORY FOR WINDS IS IN EFFECT FOR THE LAGUNA MADRE UNTIL 6 PM. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. MARINE IMPACT... SMALL CRAFT ADVISORIES FOR WIND WILL BE POSSIBLE FOR THE LAGUNA MADRE THROUGH TUESDAY. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF STORM SPOTTER GROUPS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL WILL NOT BE NEEDED. BUTTS
The Corpus Christi radar (KCRP), 207 km away, was scanning. The volume nearest the first event began at 22:16 UTC.
1 thunderstorm wind. Local standard time, as filed.
Estimated downburst winds of around 65 mph damaged the roofs of homes and a small business, snapped tree limbs, and blew over a number of trailers at the San Ygnacio RV park.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2013Every state in 2013This day in weather historyWarnings in Texas, July 2013
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: 468243.