The dome of high pressure that just sat over the southern third of the nation finally started to relent in early July, but not before providing a hot to very hot start to the month across the eastern portions of the Rio Grande Valley and Deep South Texas.
Every event with a place to put it; 4 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.
The dome of high pressure that just sat over the southern third of the nation finally started to relent in early July, but not before providing a hot to very hot start to the month across the eastern portions of the Rio Grande Valley and Deep South Texas.
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 1, 5:30 AM CST, 4 hours 23 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service Brownsville TX 630 AM CDT Sat Jul 1 2023 ...New AVIATION... .SHORT TERM... (Today through Sunday) Issued at 302 AM CDT Sat Jul 1 2023 A quick survey of the ASOS/AWOS sites across the BRO CWFA indicate that Heat Advisory heat indices did not achieve Advisory criteria on Friday. Using a 50/50 blend of NBM and CONSShort for dewpoint and high temperatures for the short term portion of the forecast results in a Heat Advisory non-issuance again today and likely on Sunday. Thus, will likely issue a Special Weather Statement for Saturday heat indices. Overall, the forecast philosophy remains the same. 500 mb high pressure, initially centered over Louisiana, will remain the dominant weather feature over Deep South Texas and the Rio Grande Valley through the period. However, the encouraging aspect is that the mid-level ridge will steadily shift east and dissipate, which will be more of a factor temperature and precipitation-wise during the long term portion of the forecast. For now, dry weather with well above normal high temperatures will occur for the weekend. && .LONG TERM... (Sunday night through Friday) Issued at 302 AM CDT Sat Jul 1 2023 The 500mb ridge will continue to shift eastward and flatten as a mid-level trough swings over the Plains. Rain chances are expected to remain on the low side Sunday night into Tuesday as moisture appears very limited. However, can not rule out early morning streamer showers near coast during this time and isolated thunderstorms Tuesday afternoon. Deeper moisture arrives by midweek as PWATs climb to above 2 inches. NBM probabilities range between 25 to 45 percent Wednesday through Friday. Mid-level ridging over the northern Mexico into the Southwest states, builds eastward over the region by the weekend reducing rain chances. Highs each today will range from near 90 on the immediate coastline and mid 90s to around 100 degrees inland. Daily heat indices are expected between 105 and 112 degrees most afternoons. Warm and humid each night with overnight lows between 75- 80 degrees. && .AVIATION... (12Z TAFS) Issued at 627 AM CDT Sat Jul 1 2023 Tranquil aviation conditions continue to be anticipated, with light to moderate winds and breezy daytime gusts. VFR will prevail through a majority of the TAF period at all aerodromes. && .MARINE... Issued at 302 AM CDT Sat Jul 1 2023 Today through Sunday: Buoy 42020 reported southeast winds around 16 knots gusting to around 19 knots with seas slightly over 3.5 feet with a period of 5 seconds at 150 CDT/650 UTC. Surface high pressure will remain the dominant feature over the western Gulf of Mexico during the period. With a modest pressure gradient in place, light to moderate winds and low to moderate seas are forecast along the Lower Texas Coast. Although Small Craft Advisory is not likely, Small Craft Exercise Caution may be needed today, especially for the Laguna Madre. Sunday night through Friday...Broad high pressure will remain anchored across the Gulf will maintain moderate to fresh southeast winds and Gulf seas generally between 2 and 4 feet through the period. The strongest winds may occur along the Laguna Madre Tuesday and Wednesday afternoons. Small Craft Advisories are not anticipated through the week. Rain chances slowly increase across the coastal waters through the period. && .PRELIMINARY POINT TEMPS/POPS... BROWNSVILLE 95 80 95 79 / 0 0 0 10 HARLINGEN 98 77 97 76 / 0 0 0 0 MCALLEN 101 79 101 78 / 0 0 0 0 RIO GRANDE CITY 102 77 102 76 / 0 0 0 10 SOUTH PADRE ISLAND 87 80 88 80 / 0 0 0 10 BAYVIEW/PORT ISABEL 94 79 93 78 / 0 0 0 10 && .BRO WATCHES/WARNINGS/ADVISORIES...None. &&
Hazardous Weather Outlook National Weather Service Brownsville TX 339 AM CDT Sat Jul 1 2023 TXZ248>255-351-353>355-451-454-455-020845- 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- 339 AM CDT Sat Jul 1 2023 This Hazardous Weather Outlook is for portions of Deep South Texas. .DAY ONE...Today and Tonight There is a Moderate Risk of rip currents at the beaches of South Padre Island and at Boca Chica Beach. .DAYS TWO THROUGH SEVEN...Sunday through Friday An elevated risk of rip currents is possible at the local beaches through the entire period, including the 4th of July. A Heat Advisory is possible for all or portions of Deep South Texas and the Rio Grande Valley through the period. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. GMZ130-132-135-150-155-170-175-020845- 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- 339 AM CDT Sat Jul 1 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...Sunday through Friday 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.
3 heat, 1 excessive heat. Local standard time, as filed.
The Brownsville-South Padre International ASOS reported a heat index of 111 by 10:53 AM CDT, with 111 or higher values persisting until approximately 2:53 PM CDT on July 1st.
It is reasonable to infer that Northern Hidalgo County reached Heat criteria due to readings at the McAllen-Miller International Airport, South Texas International Airport, and Brooks County Airport, all of which reached criteria on July 1st.
The McAllen-Miller International Airport ASOS station (KMFE) recorded heat indices reaching or exceeding 116 degrees between 2:53PM CDT and 4:53PM CDT the afternoon of July 1st. The South Texas International Airport AWOS station (KEBG) recorded heat indices reaching or exceeding 116 degrees between 12:55PM CDT and 3:35PM CDT. Each of these values and durations meets the local excessive heat criteria.
The Brooks County Airport AWOS reported a heat index of 111 by 4:55 PM CDT, with 111 or higher values persisting until approximately 6:15 PM CDT on July 1st.
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, July 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: 1116803, 1116807, 1127778, 1116804.