The record breaking summer of 2023 just won't give up as high heat and humidity continued to impact the Rio Grande Valley and Deep South Texas in early September.  Southerly flow enhanced by a weak upper trough embedded in the larger La Canicula ridge pushed high humidity into the region, surging heat index to or above 111 degrees for several hours each afternoon from the end of Labor Day through the middle of that week.

Heat in NORTHERN HIDALGO COUNTY, TEXAS
From 04-SEP-23 13:35:00 to 04-SEP-23 15:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

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 September 4th.

Heat in WILLACY, TEXAS
From 04-SEP-23 10:53:00 to 04-SEP-23 15:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

By proxy with nearby ASOS, AWOS, and Texas Water Development Board Mesonet sites, it is realistic to interpolate heat index values between 111 and 115 degrees across inland Willacy County during the afternoon of September 4th. Slightly lower values are common here compared with locations in Kenedy/Brooks and Cameron, due to the populated areas being in a zone of slightly lower, but still dangerous, high temperatures.

Heat in STARR, TEXAS
From 04-SEP-23 13:00:00 to 04-SEP-23 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Falcon Lake RAWS location, 28 miles northwest of Roma, reported several hours of heat index between 111 and 115 degrees. The Texas Water Development Board mesonet site at Rancho Los Comitas in far northern Starr County reported peak heat index between 106 and 108 during the same period.  By proxy, it is assumed that populated Starr County locations along the Rio Grande fell somewhere in between for several hours, ranging from 111 to 113.

Heat in WILLACY, TEXAS
From 06-SEP-23 11:53:00 to 06-SEP-23 14:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

By proxy with nearby ASOS, AWOS, and Texas Water Development Board Mesonet sites, it is realistic to interpolate heat index values between 111 and 115 degrees across inland Willacy County during the afternoon of September 6th. Slightly lower values are common here compared with locations in Kenedy/Brooks and Cameron, due to the populated areas being in a zone of slightly lower, but still dangerous, high temperatures.

Heat in COASTAL WILLACY, TEXAS
From 04-SEP-23 10:53:00 to 04-SEP-23 15:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Cameron County Airport ASOS reported a heat index of 111 by 11:53 AM CDT, with 111 or higher values persisting until approximately 4:53 PM CDT on September 4th. By proxy, it can be inferred that Coastal Willacy County also received five hours of heat index of 111 or higher.

Heat in COASTAL KENEDY, TEXAS
From 04-SEP-23 10:53:00 to 04-SEP-23 15:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Texas Water Development Board Mesonet site in Sarita (TW100) in northern Kenedy County recorded heat indices reaching or exceeding 111 degrees between 11:56 AM CDT and 5:56 PM CDT the afternoon of September 4th. By proxy, it can be inferred that Coastal kenedy County also received five hours of heat index of 111 or higher during the same time window.

Heat in COASTAL CAMERON, TEXAS
From 06-SEP-23 11:53:00 to 06-SEP-23 15:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Cameron County Airport ASOS reported a heat index of 111 by 12:53 PM CDT, with 111 or higher values persisting until approximately 4:53 PM CDT on September 6th.

Heat in BROOKS, TEXAS
From 06-SEP-23 13:35:00 to 06-SEP-23 15:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The Brooks County Airport AWOS reported a heat index of 111 by 2:35 PM CDT, with 111 or higher values persisting until approximately 4:35 PM CDT on September 6th.

Heat in INLAND KENEDY COUNTY, TEXAS
From 05-SEP-23 13:00:00 to 05-SEP-23 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The Brooks County Airport AWOS reported a heat index of 111 by 4:15 PM CDT, with 111 or higher values persisting until approximately 6:15 PM CDT on September 5th.  Extrapolating from the typically high values at Kingsville Naval Air Station (Kleberg County) and accounting for east-southeast inflow bringing higher humidity in from the Gulf, it can be inferred that 3 hours of 111 or higher heat index values occurred across much of Inland Kenedy County, beginning a couple hours earlier (2 PM) and lasting through around 5 PM CDT.

Heat in COASTAL KENEDY, TEXAS
From 05-SEP-23 11:53:00 to 05-SEP-23 14:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Cameron County Airport ASOS reported a heat index of 111 by 12:53 PM CDT, with 111 or higher values persisting until approximately 3:53 PM CDT on September 5th. At Kingsville Naval Air Station (Kleberg County), interpolating down from the typically higher values and accounting for slightly lower temperatures but higher humidity near Laguna Madre, it can be inferred that Coastal Kenedy had 111 or higher heat index during this period.

Heat in COASTAL WILLACY, TEXAS
From 06-SEP-23 11:53:00 to 06-SEP-23 15:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Cameron County Airport ASOS reported a heat index of 111 by 12:53 PM CDT, with 111 or higher values persisting until approximately 4:53 PM CDT on September 6th. By proxy with this location, it can be inferred that Coastal Willacy County had similar conditions.

Heat in STARR, TEXAS
From 05-SEP-23 12:00:00 to 05-SEP-23 17:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Falcon Lake RAWS location, 28 miles northwest of Roma, reported several hours of heat index between 111 and 116 degrees. The Texas Water Development Board mesonet site at Rancho Los Comitas in far northern Starr County reported peak heat index between 106 and 109 during the same period.  By proxy, it is assumed that populated Starr County locations along the Rio Grande fell somewhere in between for several hours, ranging from 111 to 113.

Heat in STARR, TEXAS
From 06-SEP-23 11:00:00 to 06-SEP-23 16:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Falcon Lake RAWS location, 28 miles northwest of Roma, reported several hours of heat index between 111 and 114 degrees. The Texas Water Development Board mesonet site at Rancho Los Comitas in far northern Starr County reported peak heat index between 106 and 109 during the same period.  By proxy, it is assumed that populated Starr County locations along the Rio Grande fell somewhere in between for several hours, ranging from 111 to 113.

Heat in CAMERON, TEXAS
From 05-SEP-23 11:53:00 to 05-SEP-23 12:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Brownsville-South Padre International ASOS reported a heat index of 111 by 12:53 PM CDT, with 111 or higher values persisting until approximately 1:53 PM CDT.

Heat in COASTAL KENEDY, TEXAS
From 06-SEP-23 13:30:00 to 06-SEP-23 16:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Cameron County Airport ASOS reported a heat index of 111 by 12:53 PM CDT, with 111 or higher values persisting until approximately 4:53 PM CDT on September 6th. At Kingsville Naval Air Station (Kleberg), typically high heat index values near 117 degrees occurred from just before 3 pm until just before 5 PM CDT. By proxy with these location, and accounting for likely lower values still at or just above 111 degrees, it can be inferred that Coastal Kenedy County had similar conditions between 230 and 530 PM CDT.

Heat in INLAND KENEDY COUNTY, TEXAS
From 06-SEP-23 14:35:00 to 06-SEP-23 16:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The Brooks County Airport AWOS reported a heat index of 111 by 2:35 PM CDT, with 111 or higher values persisting until approximately 4:35 PM CDT on September 6th.  At the typically higher recording location at Kingsville Naval Air Station (which peaked just below 117 at 3:56 PM CDT), and farther south in Cameron County, it can be inferred that up to three hours of heat index of 111 or higher occurred across portions of Inland Kenedy County.

Heat in CAMERON, TEXAS
From 06-SEP-23 11:53:00 to 06-SEP-23 14:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Harlingen-Valley International Airport ASOS reported a heat index of 111 by 1:52 PM CDT, with 111 or higher values persisting until approximately 2:52 PM CDT on September 6th. The Brownsville-South Padre International ASOS reported a heat index of 111 by 12:53 PM CDT, with 111 or higher values persisting until approximately 3:53 PM CDT.

Heat in SOUTHERN HIDALGO COUNTY, TEXAS
From 05-SEP-23 12:53:00 to 05-SEP-23 14:55:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The McAllen-Miller International Airport ASOS station (KMFE) recorded heat indices reaching or exceeding 111 degrees between 1:53PM CDT and 2:53PM CDT the afternoon of September 5th. The South Texas International Airport AWOS station (KEBG) recorded heat indices reaching or exceeding 111 degrees between 2:15PM CDT and 3:55PM CDT the afternoon of September 5th.

Heat in SOUTHERN HIDALGO COUNTY, TEXAS
From 06-SEP-23 12:35:00 to 06-SEP-23 16:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The McAllen-Miller International Airport ASOS station (KMFE) recorded heat indices reaching or exceeding 111 degrees between 1:53PM CDT and 4:53PM CDT the afternoon of September 6th. The South Texas International Airport AWOS station (KEBG) recorded heat indices reaching or exceeding 111 degrees between 1:35PM CDT and 5:35PM CDT the afternoon of September 6th.

Heat in SOUTHERN HIDALGO COUNTY, TEXAS
From 04-SEP-23 13:35:00 to 04-SEP-23 15:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The McAllen-Miller International Airport ASOS station (KMFE) recorded heat indices reaching or exceeding 111 degrees between 3:53PM CDT and 4:53PM CDT the afternoon of September 4th. The South Texas International Airport AWOS station (KEBG) recorded heat indices reaching or exceeding 111 degrees between 2:35PM CDT and 4:35PM CDT the afternoon of September 4th.

Heat in INLAND KENEDY COUNTY, TEXAS
From 04-SEP-23 10:56:00 to 04-SEP-23 16:56:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Texas Water Development Board Mesonet site in Sarita (TW100) in northern Kenedy County recorded heat indices reaching or exceeding 111 degrees between 11:56 AM CDT and 5:56 PM CDT the afternoon of September 4th.

Heat in CAMERON, TEXAS
From 04-SEP-23 09:12:00 to 04-SEP-23 15:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Harlingen-Valley International Airport ASOS reported a heat index of 111 by 1:52 PM CDT, with 111 or higher values persisting until approximately 4:52 PM CDT on September 4th. The Brownsville-South Padre International ASOS reported a heat index of 111 by 10:12 AM CDT, with 111 or higher values persisting until approximately 4:53 PM CDT.

Heat in NORTHERN HIDALGO COUNTY, TEXAS
From 05-SEP-23 12:53:00 to 05-SEP-23 14:55:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

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 September 5th.

Heat in NORTHERN HIDALGO COUNTY, TEXAS
From 06-SEP-23 12:35:00 to 06-SEP-23 16:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

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 September 6th.

Heat in WILLACY, TEXAS
From 05-SEP-23 11:53:00 to 05-SEP-23 12:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

By proxy with nearby ASOS, AWOS, and Texas Water Development Board Mesonet sites, it is realistic to interpolate heat index values between 111 and 115 degrees across inland Willacy County during the afternoon of September 5th. Slightly lower values are common here compared with locations in Kenedy/Brooks and Cameron, due to the populated areas being in a zone of slightly lower, but still dangerous, high temperatures.

Heat in COASTAL CAMERON, TEXAS
From 04-SEP-23 10:53:00 to 04-SEP-23 15:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Cameron County Airport ASOS reported a heat index of 111 by 11:53 AM CDT, with 111 or higher values persisting until approximately 4:53 PM CDT on September 4th.

Heat in COASTAL CAMERON, TEXAS
From 05-SEP-23 11:53:00 to 05-SEP-23 14:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Cameron County Airport ASOS reported a heat index of 111 by 12:53 PM CDT, with 111 or higher values persisting until approximately 3:53 PM CDT on September 5th.

Heat in BROOKS, TEXAS
From 05-SEP-23 15:15:00 to 05-SEP-23 17:15:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The Brooks County Airport AWOS reported a heat index of 111 by 4:15 PM CDT, with 111 or higher values persisting until approximately 6:15 PM CDT on September 5th.

Heat in COASTAL WILLACY, TEXAS
From 05-SEP-23 11:53:00 to 05-SEP-23 14:53:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Cameron County Airport ASOS reported a heat index of 111 by 12:53 PM CDT, with 111 or higher values persisting until approximately 3:53 PM CDT on September 5th. By proxy, and interpolating among observations across the Texas Coastal Plains, it can be inferred that Coastal Willacy had similar conditions.