Cameron County experienced yet another round of high heat and humidity in late August.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
Cameron County experienced yet another round of high heat and humidity in late August.
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 Aug 28, 1:22 PM CST, 31 minutes earlier.
Area Forecast Discussion National Weather Service Brownsville TX 222 PM CDT Mon Aug 28 2023 ...New SHORT TERM, LONG TERM, MARINE... .SHORT TERM... (Tonight through Tuesday night) Issued at 216 PM CDT Mon Aug 28 2023 Latest HRRR model run does not show much in the way of convection over most of the short term period. Other model guidance has been treading a bit downward on the chances of rain as well. As such, PoPs have been reduced a bit for the short term period so that showers and thunderstorms are isolated at best. Subsidence from the developing Tropical Storm Idalia are a factor that the models are going with in reducing rainfall potential. Models still have a weak cold front towards the north trying to push south, but it seems that it gets into the Northern Ranchlands around late tonight and early tomorrow, before then starting to pull back a bit towards the north and stalling out north of Deep South Texas and the Rio Grande Valley. Outside of the lowered possibility of rain, winds are going to be light through the short term period, but will shift towards the north by tomorrow, and then change again towards the southwest. Dry air is expected for tomorrow which will help keep the area out of Heat Advisory criteria and the air should feel less humid as well. While the minimum relative humidity is low for the region, fire weather concerns are limited due to the winds being so light. High temperatures for tomorrow see 100s for most of the region, however along the coast the highs will be in the upper 90s. Low temperatures for tonight are expected to be in the upper 70s to low 80s, while tomorrow night will be in a similar range, but with a greater spread of temperatures in the upper 70s rather than lower 80s. && .LONG TERM... (Wednesday through next Monday) Issued at 216 PM CDT Mon Aug 28 2023 As Idalia is working through the Florida peninsula on Wednesday and broad low pressure expands across the northern Gulf of Mexico, very dry air arrives into Deep South Texas by way of a weak stalling boundary and deep northerly to northeasterly flow rounding the mid-level ridge across the Four Corners. As the ridge heads east through the Plains and into the Ohio River Valley over the weekend, low pressure across the western Gulf becomes cut off and persists offshore through the holiday weekend before working inland on Labor Day. Moisture gradually increases over the weekend into next week and tries to bring back rain chances, mainly along the seabreeze Saturday through Monday. POPs remain rather low at this time. Triple digit heat continues for most inland locations with a slight reprieve possible along the coastal counties and lower to mid valley over the weekend with any increased cloud cover. Potential coastal hazards locally from Idalia will need to be monitored mid week. Long period swell Wednesday into Thursday will build offshore seas and likely enhance rip currents along the lower Texas coast. With the full moon on Wednesday, astronomical tides will be a little stronger as well, so coastal run-up may also be in play during high tides. Confidence is a little low at this time, due to the limited run the cyclone has across Gulf waters leading into landfall and unknown strength of the rapid intensification expected over the next 24 to 36 hours. Fire weather is also worth monitoring through the long term period with RH values generally less than 30 percent across most inland areas Wednesday and Thursday, and tanking into the teens across Zapata County Wednesday through Friday. At this time, 20 foot winds either remain just below criteria or arrive as RH values recover into the evening hours. Regardless, with crispy fuels and the summer wildfire season in full swing, RH values this low are concerning. && .AVIATION... (18Z TAFS) Issued at 1221 PM CDT Mon Aug 28 2023 VFR conditions to persist for the duration of the TAF cycle at all TAF sites. Winds are going to be light and variable for the cycle. && .MARINE... Issued at 216 PM CDT Mon Aug 28 2023 Tonight through Tuesday Night..Favorable marine conditions are expected tonight through Tuesday night with light and variable winds and low waves. A weak cold front is expected to push into the northern waters late tonight or early tomorrow before moving back north. Isolated showers and thunderstorms are possible, most likely occurring tomorrow. Wednesday through Monday...Idalia may make landfall in Florida as a major hurricane on Wednesday, potentially building a long period swell across the Gulf into late Wednesday and Thursday. Gulf seas may build to around 5 to 7 feet before more favorable marine conditions generally return through the holiday weekend. Persistent low pressure across the western Gulf of Mexico will gradually build rain chances through Monday, generally offshore overnight and onshore each morning. Winds and seas will be higher near any thunderstorms. && .PRELIMINARY POINT TEMPS/POPS... BROWNSVILLE 80 100 79 99 / 0 10 10 10 HARLINGEN 77 100 75 100 / 0 20 0 0 MCALLEN 80 103 78 103 / 0 10 0 0 RIO GRANDE CITY 80 102 77 104 / 0 10 0 0 SOUTH PADRE ISLAND 82 91 81 91 / 0 10 10 0 BAYVIEW/PORT ISABEL 78 97 77 96 / 0 10 0 0 && .BRO WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && SHORT TERM...64-Katz LONG TERM....56-Hallman AVIATION...64-Katz
Hazardous Weather Outlook National Weather Service Brownsville TX 406 AM CDT Mon Aug 28 2023 TXZ248>255-351-353>355-451-454-455-290915- Zapata-Jim Hogg-Brooks-Inland Kenedy-Starr-Southern Hidalgo- Inland Willacy-Inland Cameron-Coastal Kenedy-Northern Hidalgo- Coastal Willacy-Coastal Cameron-Kenedy Island-Willacy Island- Cameron Island- 406 AM CDT Mon Aug 28 2023 This Hazardous Weather Outlook is for portions of Deep South Texas. .DAY ONE...Today and Tonight Heat index values of 105 to 110 degrees are expected this afternoon. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday An elevated risk of rip currents is possible at the beaches of South Padre Island and at Boca Chica Beach Wednesday through Friday. Heat index values of 105 to 110 degrees are expected during the afternoon hours of Tuesday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. GMZ130-132-135-150-155-170-175-290915- 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- Gulf waters from Port Mansfield to the Rio Grande out 20 nm- Gulf waters from Baffin Bay to Port Mansfield out 20 nm- Gulf waters from Port Mansfield to the Rio Grande extending from 20 to 60 nm- Gulf waters from Baffin Bay to Port Mansfield extending from 20 to 60 nm- 406 AM CDT Mon Aug 28 2023 This Hazardous Weather Outlook is for portions of The Gulf of Mexico and The Laguna Madre. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
The national radar mosaic for the moment the first event began.
1 heat. Local standard time, as filed.
The Brownsville-South Padre International ASOS reported a heat index of 111 by 2:53 PM CDT, with 111 or higher values persisting until approximately 4:53 PM CDT.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2023Every state in 2023This day in weather historyWarnings in Texas, August 2023
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: 1118642.