Excessive Heat and Heat in Texas, June 1 to 6, 2024

Name: Excessive Heat and Heat in Texas, June 1 to 6, 2024
Start: 2024-06-01T12:53
End: 2024-06-06T17:30
Location: Texas

June 1 to 6, 2024 · NWS BRO · 32 events in 10 counties and zones

Where it happened

Every event with a place to put it; 32 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

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Floods
Wind
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Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
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The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 32

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.

What happened

The episode as NWS BRO wrote it up.

A strong subtropical atmospheric ridge, or heat dome, remained anchored over the region, creating up to six days of dangerous heat conditions at the start of June. At five thousand feet above ground, the temperature soared anywhere from 78 to 90 degrees Fahrenheit, which translated into a continuation of what was a short-lived, but intense heat wave over the region with actual temperatures rising into the upper 90s to mid 100s from June 1-6. The combination of heat and dewpoint temperatures well into the 70s to around 80, and heat index values ranged between a sweltering 111F-1xxF across parts of Deep South Texas and the Rio Grande Valley. The hottest temperatures were once again located from the mid-lower Rio Grande Valley northward along I-69E and I-69C. The hottest feeling day was June 5th, from Brooks/Hidalgo County to Cameron, Willacy, and Kenedy County.

What forecasters said that day

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 Jun 1, 11:32 AM CST, 1 hour 21 minutes earlier.

Area forecast discussion, Jun 1, 11:32 AM CST, 1 hour 21 minutes before

Area Forecast Discussion...UPDATED
National Weather Service Brownsville TX
1232 PM CDT Sat Jun 1 2024

...New AVIATION...

.SHORT TERM...
(Today through Sunday)
Issued at 259 AM CDT Sat Jun 1 2024

Deep South Texas will remain under the northern periphery of an
upper level ridge through the period. Broad subsidence from the
ridge, and continued southeasterly surface winds will  continue to
support hot temperatures through the weekend. High temperatures are
expected to reach the upper 90s to just over 100 degrees this
afternoon, and may be slightly warmer Sunday afternoon with more
areas reaching just above 100 degrees.  Heat indices are expected to
peak out around 110 degrees this afternoon, with a few areas briefly
exceeding 111 degrees. The temporal and spatial coverage of higher
heat indices likely won’t justify a Heat Advisory this afternoon,
though a Special Weather Statement will likely be needed. Sunday
afternoon will likely be a similar story, with heat indices
remaining just below thresholds for a Heat Advisory.

Broad subsidence aloft and relativity dry mid levels will keep rain
chances near zero through the period, however there is a slight
chance for some isolated showers and thunderstorms over northern
portions of the Coastal Gulf waters later this morning.

The enhanced pressure gradient along the Lower Texas Coast will
continue to support stronger winds and moderate seas along the
coast. This will continue to support a High Risk of Rip Currents
today.

&&

.LONG TERM...
(Sunday Night through Friday)
Issued at 259 AM CDT Sat Jun 1 2024

500 mb high pressure initially centered over northern Mexico will
gradually build northwest through the period, eventually becoming
centered over New Mexico. This synoptic setup will produce dry
weather across the BRO CWFA. However, some model guidance suggests
that shortwaves riding within the mid-level flow may generate some
convection over the higher terrain of neighboring Mexico Tuesday
night and Wednesday night, which may then propagate into the
western portion of the BRO CWFA. The potential for this will need
to be monitored by successive shifts, but for now, the forecast
will be dry as previously stated.

Meanwhile, a steady increase in daytime high temperatures is also
anticipated. The combination of ambient air temperatures and
relative humidity percentages will support a HEAT ADVISORY for
portions or all of Deep South Texas and the Rio Grande Valley
Monday through Thursday, with areal coverage of the HEAT ADVISORY
likely to increase each day.

Finally, the interaction between thermal low pressure over Mexico
and high pressure over the Gulf of Mexico will create a windy
onshore flow through the period. The gradient may be intense
enough such that a WIND ADVISORY may be needed over the immediate
coastal counties (Cameron, Willacy, Kenedy) on Monday.

&&

.AVIATION...
(18Z TAFS)
Issued at 1227 PM CDT Sat Jun 1 2024

VFR ceilings for the rest of the afternoon will slowly give way to
MVFR ceilings as more low-level clouds move into the region
affecting all three TAF sites. Southeasterly winds are expected to
remain present with some gusty winds continuing through the
afternoon.

&&

.MARINE...
(Today through Sunday)
Issued at 259 AM CDT Sat Jun 1 2024

Broad surface high pressure over the Northern Gulf and a surface low
over Central Mexico will continue to support enhanced pressure
gradients along the Lower Texas Coast. This will support light to
moderate winds and moderate seas through the period. Small Craft
Should Exercise Caution headlines will likely be needed for the
Laguna Madre this afternoon, and may be needed for the nearshore
Gulf waters as well. Slightly stronger winds Sunday afternoon may
necessitate a Small Craft Advisory for the Laguna Madre and
nearshore waters.

(Sunday Night through Friday)
Small Craft Advisory conditions will exist along the Lower Texas
Coast through a majority of the period courtesy of thermal low
pressure over Mexico interacting with high pressure over the Gulf
of Mexico. Marine conditions may improve to Small Craft Exercise
Caution criteria Wednesday night through Thursday, with even
better winds and seas for Friday, as high pressure builds farther
west into the western Gulf of Mexico and weakens the pressure
gradient.

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             96  82  95  83 /  10   0   0   0
HARLINGEN               98  79  97  80 /  10   0   0   0
MCALLEN                 99  81 100  82 /  10   0   0   0
RIO GRANDE CITY        100  80 102  80 /  10  10   0   0
SOUTH PADRE ISLAND      87  82  87  83 /  10   0   0   0
BAYVIEW/PORT ISABEL     93  80  93  81 /  10   0   0   0

&&

.BRO WATCHES/WARNINGS/ADVISORIES...
TX...High Rip Current Risk until 7 PM CDT this evening for TXZ451-454-
     455.

GM...None.
&&

SHORT TERM...60-BE
LONG TERM....66-Tomaselli
AVIATION...64-Katz

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

26 heat, 6 excessive heat. Local standard time, as filed.

Heat, Southern Hidalgo County

When: June 1, 12:53 PM CST to 3:55 PM CST
Where: Southern Hidalgo County forecast zone
Reported by: ASOS
Coordinates: 26.397, -98.181 (the zone’s center; the record gives no point)

McAllen International Airport (KMFE) recorded max heat indices between 111-114F for 3 hours, from 12:53 AM-4:55 PM CDT on June 1, 2024. The Remote Automated Weather Station (RAWS) at Santa Ana NWR east of Pharr recorded a peak heat index of 113.6F at 145 PM CDT, with 112F+ continuing through 445 CDT. Given the site's slight high bias, it can be assumed that peak values were closer to 111F for this period. The Automated Weather Observing Station (AWOS) at Mid-Valley Airport in Weslaco fell just shy of 111F.

Heat, Brooks

When: June 1, 12:55 PM CST to 3:55 PM CST
Where: Brooks forecast zone
Reported by: AWOS
Coordinates: 27.032, -98.219 (the zone’s center; the record gives no point)

Falfurrias recorded max heat indices between 111-115F for 3 hours, from 12:55-4:55 PM CDT on June 1, 2024.

Heat, Willacy

When: June 3, 11:55 AM CST to 3:55 PM CST
Where: Willacy forecast zone
Reported by: AWOS
Coordinates: 26.477, -97.592 (the zone’s center; the record gives no point)

Kleberg County Airport (KIKG) in Kingsville recorded peak heat indices between 111-113F for 2 hours (from 2:55-4:55 PM). Edinburg International Airport (KMFE) recorded max heat indices between 111-112F for 2 hours, from 1:55-3:55 PM CDT on June 3, 2024. Harlingen/Valley recorded peak values ranging of 112.5 at 253 PM CDT with 111 possible for up to 90 minutes on either side. By proxy, it's conceivable that sites across Willacy County recorded peak heat indices between 111-113F for at least 2 hours between the time of 1:55-4:55 PM.

Heat, Brooks

When: June 3, 12:15 PM CST to 6:55 PM CST
Where: Brooks forecast zone
Reported by: AWOS
Coordinates: 27.032, -98.219 (the zone’s center; the record gives no point)

Falfurrias Brooks County Airport recorded max heat indices between 111-116F for 5.5 hours, from 1:15-6:55 PM CDT on June 1, 2024. Kleberg County Airport (KIKG) in Kingsville recorded peak heat indices between 111-113F for 2 hours (from 2:55-4:55 PM). Edinburg International Airport (KMFE) recorded max heat indices between 111-112F for 2 hours, from 1:55-3:55 PM CDT on June 3, 2024. By proxy, it's conceivable that sites across Brooks County recorded peak heat indices between 111-113F for at least 2 hours between the time of 1:55-4:55 PM.

Heat, Southern Hidalgo County

When: June 3, 12:53 PM CST to 4:53 PM CST
Where: Southern Hidalgo County forecast zone
Reported by: ASOS
Coordinates: 26.397, -98.181 (the zone’s center; the record gives no point)

McAllen International Airport (KMFE) recorded max heat indices between 111-116F for 5 hours, from 12:53 AM-5:53 PM CDT on June 3, 2024. Weslaco/Mid Valley Airport recorded a brief period of 111F (estimated 1400 to 1430 CST) .

Heat, Northern Hidalgo County

When: June 3, 12:55 PM CST to 2:55 PM CST
Where: Northern Hidalgo County forecast zone
Reported by: AWOS
Coordinates: 26.397, -98.181 (the zone’s center; the record gives no point)

Edinburg International Airport (KMFE) recorded max heat indices between 111-112F for 2 hours, from 1:55-3:55 PM CDT on June 3, 2024.

Heat, Inland Kenedy County

When: June 3, 12:55 PM CST to 3:55 PM CST
Where: Inland Kenedy County forecast zone
Reported by: AWOS
Coordinates: 26.928, -97.636 (the zone’s center; the record gives no point)

Kleberg County Airport (KIKG) in Kingsville recorded peak heat indices between 111-113F for 2 hours (from 2:55-4:55 PM). Edinburg International Airport (KMFE) recorded max heat indices between 111-112F for 2 hours, from 1:55-3:55 PM CDT on June 3, 2024. By proxy, it's conceivable that locations across centarl and easterly Inland Kenedy County recorded peak heat indices between 111-113F for at least 2 hours between the time of 1:55-4:55 PM. Note that the Texas Mesonet site at Sarita only touched 111F an was otherwise between 108 and 110F at peak heating.

Heat, Starr

When: June 3, 2:00 PM CST to 5:00 PM CST
Where: Starr forecast zone
Reported by: AWOS
Coordinates: 26.562, -98.738 (the zone’s center; the record gives no point)

Ranchos Los Comitos recorded max heat indices between 111-113F for 3 hours, from 3:00-6:00 PM CDT on June 3, 2024.

Heat, Cameron

When: June 4, 10:53 AM CST to 3:53 PM CST
Where: Cameron forecast zone
Reported by: ASOS
Coordinates: 26.152, -97.453 (the zone’s center; the record gives no point)

Brownsville/South Padre Island International Airport (KBRO) recorded max heat indices between 111-115F for 5 hours, from 11:53 AM-4:53 PM CDT on June 4, 2024. Harlingen Valley International Airport (KHRL) recorded max heat indices between 111-114F for over 4 hours, from 11:53 AM-4:10 PM CDT on June 4, 2024.

Heat, Southern Hidalgo County

When: June 4, 10:53 AM CST to 4:53 PM CST
Where: Southern Hidalgo County forecast zone
Reported by: ASOS
Coordinates: 26.397, -98.181 (the zone’s center; the record gives no point)

McAllen International Airport (KMFE) recorded max heat indices between 111-117F for 6 hours, from 11:53 AM-5:53 PM CDT on June 5, 2024.

Heat, Inland Kenedy County

When: June 4, 11:10 AM CST to 6:00 PM CST
Where: Inland Kenedy County forecast zone
Reported by: Mesonet
Coordinates: 26.928, -97.636 (the zone’s center; the record gives no point)

The Texas Mesonet station at Sarita recorded heat index values between 111 and 118F between 1210 and 7 PM CDT, with excessive heat only lasting a total of an hour (250 to 330 and again at 505 PM). Kleberg County Airport (KIKG) in Kingsville recorded peak heat indices between 111-117F for 6 hours (from 12:55-6:55 PM). Excessive Heat Warning criteria was met for 2 hours from 2:55-4:55 PM with values between 116-117F. Averaging these sites, and by proxy with locations south and southwest, the event is considered a Heat level (111 to 115 for 2 hours or more).

Heat, Starr

When: June 4, 11:55 AM CST to 4:20 PM CST
Where: Starr forecast zone
Reported by: AWOS
Coordinates: 26.562, -98.738 (the zone’s center; the record gives no point)

Rancho Los Comitos (Texas Mesonet) recorded max heat indices between 111-116F for 6 hours, from 12:55-5:20 PM CDT on June 5, 2024.

Heat, Zapata

When: June 4, 11:55 AM CST to 5:55 PM CST
Where: Zapata forecast zone
Reported by: AWOS
Coordinates: 27.001, -99.169 (the zone’s center; the record gives no point)

Zapata recorded max heat indices between 111-116F for 6 hours, from 12:55-6:55 PM CDT on June 4, 2024.

Heat, Willacy

When: June 4, 12:00 PM CST to 6:00 PM CST
Where: Willacy forecast zone
Reported by: AWOS
Coordinates: 26.477, -97.592 (the zone’s center; the record gives no point)

Edinburg International Airport (KMFE) recorded max heat indices between 111-112F for 3 hours, from 1:55-4:55 PM CDT on June 4, 2024. Kleberg County Airport (KIKG) in Kingsville recorded peak heat indices between 111-117F for 6 hours (from 12:55-6:55 PM). Excessive Heat Warning criteria was met for 2 hours from 2:55-4:55 PM with values between 116-117F. By proxy, it's conceivable that sites across Willacy County recorded peak heat indices between 111-117F for at least 3 hours between the time of 1:00-7:00 PM.

Heat, Northern Hidalgo County

When: June 4, 12:55 PM CST to 3:55 PM CST
Where: Northern Hidalgo County forecast zone
Reported by: AWOS
Coordinates: 26.397, -98.181 (the zone’s center; the record gives no point)

Edinburg International Airport (KMFE) recorded max heat indices between 111-112F for 3 hours, from 1:55-4:55 PM CDT on June 4, 2024.

Heat, Jim Hogg

When: June 4, 12:55 PM CST to 4:55 PM CST
Where: Jim Hogg forecast zone
Reported by: AWOS
Coordinates: 27.043, -98.697 (the zone’s center; the record gives no point)

Hebbronville recorded max heat indices between 111-114F from 1:55-5:55 PM CDT on June 4, 2024.

Excessive Heat, Brooks

When: June 4, 12:55 PM CST to 3:55 PM CST
Where: Brooks forecast zone
Reported by: AWOS
Coordinates: 27.032, -98.219 (the zone’s center; the record gives no point)

Falfurrias Brooks County Airport recorded max heat indices between 111-119F for over 8 hours, from 10:55 AM-7:15 PM CDT on June 4, 2024. Excessive Heat Warning criteria was met for over 4 hours from 12:55-5:35 PM with values between 116-119F. Edinburg International Airport (KMFE) recorded max heat indices between 111-112F for 3 hours, from 1:55-4:55 PM CDT on June 4, 2024. Kleberg County Airport (KIKG) in Kingsville recorded peak heat indices between 111-117F for 6 hours (from 12:55-6:55 PM). Excessive Heat Warning criteria was met for 2 hours from 2:55-4:55 PM with values between 116-117F. By proxy, it's conceivable that sites across Brooks County recorded peak heat indices between 111-117F for at least 3 hours between the time of 1:00-7:00 PM.

Heat, Northern Hidalgo County

When: June 5, 9:55 AM CST to 4:55 PM CST
Where: Northern Hidalgo County forecast zone
Reported by: AWOS
Coordinates: 26.397, -98.181 (the zone’s center; the record gives no point)

Excessive Heat, Cameron

When: June 5, 10:53 AM CST to 2:55 PM CST
Where: Cameron forecast zone
Reported by: ASOS
Coordinates: 26.152, -97.453 (the zone’s center; the record gives no point)

Brownsville/South Padre Island International Airport (KBRO) recorded max heat indices between 111-118F for 7 hours, from 9:53 AM-4:53 PM CDT on June 5, 2024. Heat indices reached Excessive Heat Warning criteria with values between 116-118F for 3 hours, from 11:53 AM-2:53 PM CDT. Harlingen Valley International Airport (KHRL) recorded max heat indices between 113-118F for 8 hours, from 9:53 AM-5:30 PM CDT on June 5, 2024. Heat indices reached Excessive Heat Warning criteria with values between 116-118F for 4 hours, from 11:53-3:55 PM CDT. Times used for this event are based on the Excessive Heat condition.

Excessive Heat, Southern Hidalgo County

When: June 5, 10:53 AM CST to 4:53 PM CST
Where: Southern Hidalgo County forecast zone
Reported by: ASOS
Coordinates: 26.397, -98.181 (the zone’s center; the record gives no point)

McAllen International Airport (KMFE) recorded max heat indices between 111-124F for 7 hours, from 10:53 AM-6:53 PM CDT on June 5, 2024. Heat indices reached excessive heat criteria with values between 116-124F for 6 hours, from 11:53-5:53 PM CDT. Event time shown is for Excessive Heat (116F or higher heat index) only.

Heat, Coastal Cameron

When: June 5, 10:53 AM CST to 1:53 PM CST
Where: Coastal Cameron forecast zone
Reported by: ASOS
Coordinates: 26.152, -97.453 (the zone’s center; the record gives no point)

The Cameron County Airport near Bayview recorded peak heat indices between 111-116F for 4 hours (from 11:53 AM-2:53 PM) on June 5, 2024.

Excessive Heat, Brooks

When: June 5, 11:35 AM CST to 3:35 PM CST
Where: Brooks forecast zone
Reported by: AWOS
Coordinates: 27.032, -98.219 (the zone’s center; the record gives no point)

Falfurrias Brooks County Airport recorded max heat indices between 111-124F for 5 hours, from 10:55 AM-3:55 PM CDT on June 5, 2024. Excessive Heat Warning criteria was met for 4 hours from 12:35-3:55 PM with estimated values between 116-119F based on a known high bias at the station. Edinburg International Airport recorded max heat indices between 111-117F for 7 hours, from 10:55 AM-5:55 PM CDT on June 5, 2024. Heat indices reached Excessive Heat Warning criteria with values between 116-117F over 4 hours, from 12:55-5:15 PM CDT. Kleberg County Airport (KIKG) in Kingsville recorded peak heat indices between 111-117F for 3 hours (from 12:55-2:55 PM). By proxy, it's conceivable that sites across Brooks County recorded peak heat indices estimated between 116 and 119F for at least 3 hours between the time of 12:35 AM-4:35 PM. For purposes of this event, only the Excessive Heat period is used.

Heat, Starr

When: June 5, 12:00 PM CST to 6:00 PM CST
Where: Starr forecast zone
Reported by: AWOS
Coordinates: 26.562, -98.738 (the zone’s center; the record gives no point)

Rancho Los Comitos (Texas Mesonet) recorded max heat indices between 112-116F for 6 hours, from 1:00-7:00 PM CDT on June 5, 2024.

Excessive Heat, Willacy

When: June 5, 12:00 PM CST to 6:00 PM CST
Where: Willacy forecast zone
Reported by: AWOS
Coordinates: 26.477, -97.592 (the zone’s center; the record gives no point)

Edinburg International Airport recorded max heat indices between 111-117F for 7 hours, from 10:55 AM-5:55 PM CDT on June 5, 2024. Heat indices reached Excessive Heat Warning criteria with values between 116-117F over 4 hours, from 12:55-5:15 PM CDT. Harlingen/Valley International Airport (about 7 miles from the Willacy/Cameron line) recorded 116 to 118F heat index between 1153 and 353 PM CDT. By proxy, it's conceivable that sites across Willacy County recorded peak heat indices between 111-117F for at least 3 hours between the time of 10:55 AM-5:55 PM.

Heat, Zapata

When: June 5, 12:55 PM CST to 5:55 PM CST
Where: Zapata forecast zone
Reported by: AWOS
Coordinates: 27.001, -99.169 (the zone’s center; the record gives no point)

Zapata recorded max heat indices between 111-117F for 5 hours, from 1:55-6:55 PM CDT on June 5, 2024.

Excessive Heat, Inland Kenedy County

When: June 5, 1:00 PM CST to 4:00 PM CST
Where: Inland Kenedy County forecast zone
Reported by: Mesonet
Coordinates: 26.928, -97.636 (the zone’s center; the record gives no point)

The Texas Mesonet site at Sarita recorded heat index values between 116 and 121F between 210 PM and 320 PM CST. Kleberg County Airport (KIKG) in Kingsville recorded peak heat indices between 111-117F for 3 hours (from 12:55-2:55 PM) but reached 116F or higher from 130 PM CDT until 330 PM CDT. By proxy, other sites across Inland Kenedy County recorded peak heat indices between 116-121F for up to least 3 hours between the time of 1 and 4 PM CDT. Note that time shown is for the duration of Excessive Heat (116F or higher).

Heat, Cameron

When: June 6, 11:45 AM CST to 3:53 PM CST
Where: Cameron forecast zone
Reported by: ASOS
Coordinates: 26.152, -97.453 (the zone’s center; the record gives no point)

Brownsville/South Padre Island International Airport (KBRO) recorded max heat indices between 111-113F for 4 hours, from 11:45 AM-3:53 PM CDT on June 6, 2024. Harlingen Valley International Airport (KHRL) recorded max heat indices between 111-116F for 3 hours, from 1:53-4:53 PM CDT on June 6, 2024.

Heat, Brooks

When: June 6, 11:55 AM CST to 5:30 PM CST
Where: Brooks forecast zone
Reported by: AWOS
Coordinates: 27.032, -98.219 (the zone’s center; the record gives no point)

Falfurrias Brooks County Airport recorded max heat indices between 111-118F for 5.5 hours, from 12:55-6:30 PM CDT on June 6, 2024. Edinburg International Airport recorded max heat indices between 112-115F for 4 hours, from 1:55-5:55 PM CDT on June 6, 2024. By proxy, it's conceivable that other sites across Brooks County recorded peak heat indices between 111-115F for at least 4 hours between the time of 12:55-6:30 PM.

Heat, Southern Hidalgo County

When: June 6, 12:53 PM CST to 4:53 PM CST
Where: Southern Hidalgo County forecast zone
Reported by: ASOS
Coordinates: 26.397, -98.181 (the zone’s center; the record gives no point)

McAllen International Airport (KMFE) recorded max heat indices between 112-118F for 4 hours, from 1:53-5:53 PM CDT on June 6, 2024.

Heat, Northern Hidalgo County

When: June 6, 12:53 PM CST to 4:53 PM CST
Where: Northern Hidalgo County forecast zone
Reported by: AWOS
Coordinates: 26.397, -98.181 (the zone’s center; the record gives no point)

Edinburg International Airport recorded max heat indices between 112-115F for 4 hours, from 1:55-5:55 PM CDT on June 6, 2024.

Heat, Willacy

When: June 6, 12:53 PM CST to 3:53 PM CST
Where: Willacy forecast zone
Reported by: ASOS
Coordinates: 26.477, -97.592 (the zone’s center; the record gives no point)

Harlingen/Valley International Airport recorded max heat indices between 111-116F for 3 hours, from 1:53-4:53 PM CDT on June 6, 2024. The Texas AgriScience Center Mesonet site (a few miles west of the Willacy/Hidalgo County line) recorded a little less than an hour of 111-113F heat index between 215 and 255 PM CDT. By proxy, sites in inland Willacy County likely had between 2 and 3 hours of heat index values between 111 and 114F.

Heat, Starr

When: June 6, 12:53 PM CST to 3:30 PM CST
Where: Starr forecast zone
Reported by: RAWS
Coordinates: 26.562, -98.738 (the zone’s center; the record gives no point)

The Remote Automated Weather Station (RAWS) site at La Puerta, 5.65 miles east of Rio Grande City, reported an estimated 2.5 hours of heat index of 111 to 112F. Rancho Las Comitas, along the Starr/Jim Hogg County line, fell just shy of 111 (107 to 110) during the same window. Note that values shown here are lower than those observed by 3 degrees, based on a known high bias compared with proxy observations in the region.

What these are

Heat: Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.
Excessive Heat: Heat at or above the local excessive heat warning criteria, or heat that caused deaths.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Texas in 2024 Every state in 2024 This day in weather history Warnings in Texas, June 2024

Sources

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: 1192012, 1192015, 1193068, 1191998, 1191985, 1191987, 1193069, 1191996, 1191295, 1191299, 1191973, 1191323, 1191341, 1191972, 1191300, 1191335, 1197629, 1191269, 1191255, 1191264, 1195272, 1191290, 1191283, 1191292, 1191289, 1191291, 1192020, 1192017, 1192018, 1192019, 1192021, 1192023.