A surge of moisture combined with coastal troughing led to the development of scattered showers and thunderstorms across the Rio Grande Valley. Outflow winds from some of these thunderstorms moved across the region causing minor damage in Willacy 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 surge of moisture combined with coastal troughing led to the development of scattered showers and thunderstorms across the Rio Grande Valley. Outflow winds from some of these thunderstorms moved across the region causing minor damage in Willacy 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 Sep 4, 12:10 PM CST, 27 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service BROWNSVILLE TX 110 PM CDT SUN SEP 4 2016 .DISCUSSION...Updated for latest aviation discussion below. && .AVIATION...Main challenge is timing of showers and isolated thunderstorms moving across the flying area from the SE this afternoon and perhaps into the early evening. Showers at BRO terminal at this time but lightning scant. Will monitor for possible AWW. Gusty outflow winds to around 40KT have also occurred from outflow and should be arriving at HRL shortly. Included TEMPO thunder groups at all 3 terminals through 22-01Z but will have to watch this. Short-term guidance suggesting most activity will die off after sunset, but boundaries kicking around could keep it going longer...especially at MFE. Confidence not particularly high on ending time of convective threat...but VFR with light SE winds should take hold by sometime later this evening. SE breezes pick up by mid-morning on Tuesday with VFR continuing. && .PREV DISCUSSION... /issued 638 AM CDT SUN SEP 4 2016/ DISCUSSION...Updated for latest aviation discussion below. AVIATION...Skies currently SKC to SCT across the region, but will build during the later mornign hours as moisture arrives from the southeast. Showers and thunderstorms will become more likely areawide this afternoon, with tempo reductions in vis and cigs. Shower activity will diminish after sunset, but will continue to be a threat through most of the night tonight. PREV DISCUSSION... /issued 406 AM CDT SUN SEP 4 2016/ SHORT TERM (Today through Monday): Surge of moisture noted in WV imagery lurking just offshore, and will arrive later this morning. PW values already at 2.0 for last evening's sounding will rise near 2.25 during the day. Showers and a few thunderstorms will begin to spark later this morning, fueled by the ample moisture. Steering flow remain light southerly around 5 knots, so storms will be more outflow dominated this afternoon, with some locally higher precipitation possible. Highs today will be held down somewhat by the expected higher cloud cover and rainfall in the region. Models show the deeper moisture continuing off to the north, with some slightly drier air returning later tonight. This will allow rain chances to decrease tonight into tomorrow. The H5 ridge will not yet have returned aloft, so some seabreeze showers are still possible Monday afternoon. LONG TERM (Monday Night through Saturday): Models remain in good good agreement with Mid level high pressure building and strengthening over Texas through Thursday. As we approach the end of the week the ridge breaks down and an inverted trough moves into the western gulf and over South Texas. Atmosphere to gradually dry out with rain chances waning Tuesday with virtually very low chances Wednesday and Thursday. Moisture slowly increases late next week with more appreciable moisture and increasing chances of rain next weekend. A blend of the models looks somewhat reasonable at this time with more or less trending towards climatology. Temperatures to warm up mid week as the rain chances lower then trend back to normal as the rain chances increase. MARINE:(Today through Monday): Surface winds will remain light today as the pressure gradient remains weak across the northwest gulf. Showers and thunderstorms will become more numerous today as moisture arrives from the southeast. Winds are forecast to increase on Monday as the surface high strengthens across the northern gulf. This will help increase seas to near 4 feet during the afternoon. Monday night through Thursday...Broad high pressure extending over the Gulf of mexico to combine with lower pressure over northeast Mexico and the Southwest Gulf providing the Lower Texas coast with a moderate southeast wind and slight to moderate sea. && .BRO Watches/Warnings/Advisories... TX...None. GM...None. && This product is also available on the web at: HTTP://WEATHER.GOV/RGV 53-SCHROEDER/69
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BROWNSVILLE TX 612 AM CDT SUN SEP 4 2016 TXZ248>257-051115- ZAPATA-JIM HOGG-BROOKS-KENEDY-STARR-HIDALGO-INLAND WILLACY- INLAND CAMERON-COASTAL WILLACY-COASTAL CAMERON- 612 AM CDT SUN SEP 4 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF DEEP SOUTH TEXAS. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS MAY PRODUCE LOCALLY HEAVY RAINFALL LEADING TO NUISANCE FLOODING OF STREET AND LOW LYING AREAS THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. GMZ130-132-135-150-155-170-175-051115- 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- 612 AM CDT SUN SEP 4 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE GULF OF MEXICO AND THE LAGUNA MADRE. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS WILL PRODUCE OCCASIONAL CLOUD TO SURFACE LIGHTNING...GUSTY WINDS...AND LOCALLY HIGHER SWELLS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1229 PM CDT SUN SEP 4 2016
TXZ255-257-041800-
INLAND CAMERON TX-COASTAL CAMERON TX-
1229 PM CDT SUN SEP 4 2016
...SIGNIFICANT WEATHER ADVISORY FOR CAMERON COUNTY UNTIL 100 PM
CDT...
AT 1227 PM CDT...DOPPLER RADAR WAS TRACKING OUTFLOW FROM
THUNDERSTORMS ALONG A LINE EXTENDING FROM 14 MILES SOUTHEAST OF
SOUTH POINT TO 16 MILES SOUTHWEST OF FORT BROWN MEMORIAL GOLF
COURSE. MOVEMENT WAS NORTHWEST AT 35 MPH.
WINDS IN EXCESS OF 45 MPH WILL BE POSSIBLE WITH THESE STORMS.
LOCATIONS IMPACTED INCLUDE...
HARLINGEN...SAN BENITO...LA FERIA...LOS FRESNOS...RANCHO VIEJO...RIO
HONDO...LOS INDIOS...LAURELES...DOWNTOWN BROWNSVILLE AND SANTA MARIA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY LEAD TO
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 2584 9743 2588 9746 2594 9758 2603 9764
2605 9786 2618 9786 2627 9731 2624 9733
2626 9730 2622 9734 2623 9732 2611 9730
2608 9722 2604 9720 2600 9726 2601 9721
2596 9717 2593 9735 2584 9737
TIME...MOT...LOC 1727Z 153DEG 37KT 2578 9718 2570 9767
69SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
104 PM CDT SUN SEP 4 2016
TXZ255-041845-
INLAND CAMERON TX-
104 PM CDT SUN SEP 4 2016
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CAMERON COUNTY UNTIL 145
PM CDT...
AT 102 PM CDT...DOPPLER RADAR WAS TRACKING OUTFLOW FROM SHOWERS
THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR LANDRUM TO 6 MILES
SOUTHWEST OF LAGUNA VISTA POLICE DEPARTMENT. MOVEMENT WAS NORTHWEST
AT 25 MPH.
WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THESE STORMS.
LOCATIONS IMPACTED INCLUDE...
HARLINGEN...SAN BENITO...LA FERIA...LOS FRESNOS...RANCHO VIEJO...RIO
HONDO...PALM VALLEY...LOS INDIOS...LA PALOMA AND LAURELES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY LEAD TO
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
LAT...LON 2599 9763 2600 9762 2601 9765 2602 9764
2603 9764 2602 9767 2603 9766 2603 9769
2602 9769 2604 9771 2603 9774 2603 9773
2602 9774 2614 9786 2622 9786 2624 9743
2600 9730 2598 9762
TIME...MOT...LOC 1802Z 134DEG 21KT 2600 9769 2602 9734
69The Brownsville radar (KBRO), 78 km away, was scanning. The volume nearest the first event began at 18:35 UTC.
1 thunderstorm wind. Local standard time, as filed.
Willacy County Emergency Manager reported a telephone pole blown down on FM 1015 in the town of Lasara and a power line down in Raymondville, near the intersection of TX 186 and Business 77.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2016Every state in 2016This day in weather historyWarnings in Texas, September 2016
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: 658169.