A stubborn area of high pressure combined with ample surface moisture led to more heat advisory criteria across the region.

Heat in BROOKS, TEXAS
From 12-AUG-23 13:15:00 to 12-AUG-23 17:35:00 (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 2:15 PM CDT, with 111 or higher values persisting until approximately 6:35 PM CDT on August 12th.

Heat in BROOKS, TEXAS
From 13-AUG-23 11:15:00 to 13-AUG-23 16:55:00 (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 12:15 PM CDT, with 111 or higher values persisting until approximately 5:55 PM CDT on August 13th.

Heat in ZAPATA, TEXAS
From 11-AUG-23 14:15:00 to 11-AUG-23 16:35:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The Zapata County Airport AWOS reported a heat index of 111 by 3:15 PM CDT, with 111 or higher values persisting until approximately 5:35 PM CDT on August 11th.

Heat in CAMERON, TEXAS
From 14-AUG-23 10:53:00 to 14-AUG-23 15:52:00 (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 12:52 PM CDT, with 111 or higher values persisting until approximately 4:52 PM CDT on August 14th. The Brownsville-South Padre International ASOS reported a heat index of 111 by 11:53 AM CDT, with 111 or higher values persisting until approximately 3:53 PM CDT.

Heat in CAMERON, TEXAS
From 15-AUG-23 11:53:00 to 15-AUG-23 15:29:00 (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 4:29 PM CDT on August 15th. 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 2:27 PM CDT.

Heat in SOUTHERN HIDALGO COUNTY, TEXAS
From 14-AUG-23 13:55:00 to 14-AUG-23 15:55:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The South Texas International Airport AWOS station (KEBG) recorded heat indices reaching or exceeding 111 degrees between 2:55PM CDT and 4:55PM CDT the afternoon of August 14th.

Heat in COASTAL CAMERON, TEXAS
From 14-AUG-23 10:53:00 to 14-AUG-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 August 14th.

Heat in COASTAL CAMERON, TEXAS
From 15-AUG-23 10:53:00 to 15-AUG-23 12:53:00 (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 1:53 PM CDT on August 15th.

Heat in INLAND KENEDY COUNTY, TEXAS
From 11-AUG-23 12:40:00 to 11-AUG-23 16:10:00 (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 1:40PM CDT and 5:10PM CDT the afternoon of August 11th.

Heat in INLAND KENEDY COUNTY, TEXAS
From 12-AUG-23 11:55:00 to 12-AUG-23 15:55:00 (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 12:55PM CDT and 4:55PM CDT the afternoon of August 12th.

Heat in INLAND KENEDY COUNTY, TEXAS
From 13-AUG-23 12:40:00 to 13-AUG-23 15:20:00 (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 1:40PM CDT and 4:20PM CDT the afternoon of August 13th.

Heat in STARR, TEXAS
From 11-AUG-23 12:30:00 to 11-AUG-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 117 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 12-AUG-23 12:00:00 to 12-AUG-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 117 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 13-AUG-23 12:00:00 to 13-AUG-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 117 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 WILLACY, TEXAS
From 11-AUG-23 10:53:00 to 11-AUG-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 August 11th. 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 WILLACY, TEXAS
From 12-AUG-23 09:53:00 to 12-AUG-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 August 12th. 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 WILLACY, TEXAS
From 13-AUG-23 09:52:00 to 13-AUG-23 14:52:00 (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 August 13th. 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 NORTHERN HIDALGO COUNTY, TEXAS
From 11-AUG-23 12:53:00 to 11-AUG-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 August 11th.

Heat in NORTHERN HIDALGO COUNTY, TEXAS
From 12-AUG-23 11:55:00 to 12-AUG-23 15:55:00 (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 August 12th.

Heat in NORTHERN HIDALGO COUNTY, TEXAS
From 13-AUG-23 11:55:00 to 13-AUG-23 15:55:00 (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 August 13th.

Heat in COASTAL WILLACY, TEXAS
From 11-AUG-23 11:53:00 to 11-AUG-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 August 11th. By proxy, it can be assumed that Coastal Willacy County had similar conditions.

Heat in COASTAL KENEDY, TEXAS
From 11-AUG-23 11:53:00 to 11-AUG-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 August 11th. By proxy, it can be assumed that Coastal Kenedy County had similar conditions. The Texas Water Development Board location at Sarita (northwest Kenedy) recorded a little more than three hours of similar conditions.

Heat in COASTAL KENEDY, TEXAS
From 13-AUG-23 10:53:00 to 13-AUG-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 11:53 AM CDT, with 111 or higher values persisting until approximately 3:53 PM CDT on August 13th. By proxy, it can be assumed that Coastal Kenedy County had similar conditions. The Texas Water Development Board mesonet site in Sarita reported more than 3.5 hours of similar conditions as well.

Heat in COASTAL CAMERON, TEXAS
From 12-AUG-23 08:30:00 to 12-AUG-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 9:30 AM CDT, with 111 or higher values persisting until approximately 4:53 PM CDT on August 12th. By proxy, it can be assumed that Coastal Willacy County had similar conditions.

Heat in COASTAL KENEDY, TEXAS
From 12-AUG-23 11:30:00 to 12-AUG-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 9:30 AM CDT, with 111 or higher values persisting until approximately 4:53 PM CDT on August 12th. By proxy, it can be assumed that Coastal Kenedy County had similar conditions. At the Texas Water Development Board mesonet site in Sarita (northwest Kenedy), four hours of similar conditions occurred. Start times were estimated to be in between the two.

Heat in BROOKS, TEXAS
From 11-AUG-23 15:55:00 to 11-AUG-23 17:35:00 (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 3:55 PM CDT, with 111 or higher values persisting until approximately 6:35 PM CDT on August 11th.

Heat in CAMERON, TEXAS
From 11-AUG-23 10:53:00 to 11-AUG-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 3:52 PM CDT on August 11th. The Brownsville-South Padre International ASOS reported a heat index of 111 by 11:53 AM CDT, with 111 or higher values persisting until approximately 4:53 PM CDT.

Heat in CAMERON, TEXAS
From 12-AUG-23 09:53:00 to 12-AUG-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 12:52 PM CDT, with 111 or higher values persisting until approximately 4:52 PM CDT on August 12th. 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 4:53 PM CDT.

Heat in CAMERON, TEXAS
From 13-AUG-23 09:52:00 to 13-AUG-23 14:52:00 (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 10:52 AM CDT, with 111 or higher values persisting until approximately 3:52 PM CDT on August 13th. The Brownsville-South Padre International ASOS reported a heat index of 111 by 11:53 AM CDT, with 111 or higher values persisting until approximately 2:53 PM CDT.

Heat in SOUTHERN HIDALGO COUNTY, TEXAS
From 11-AUG-23 12:53:00 to 11-AUG-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 3:53PM CDT the afternoon of August 11th. The South Texas International Airport AWOS station (KEBG) recorded heat indices reaching or exceeding 111 degrees between 1:55PM CDT and 5:35PM CDT the afternoon of August 11th.

Heat in SOUTHERN HIDALGO COUNTY, TEXAS
From 12-AUG-23 11:55:00 to 12-AUG-23 15:55:00 (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 4:53PM CDT the afternoon of August 12th. The South Texas International Airport AWOS station (KEBG) recorded heat indices reaching or exceeding 111 degrees between 12:55PM CDT and 4:55PM CDT the afternoon of August 12th.

Heat in SOUTHERN HIDALGO COUNTY, TEXAS
From 13-AUG-23 11:55:00 to 13-AUG-23 15:55:00 (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 3:53PM CDT the afternoon of August 13th. The South Texas International Airport AWOS station (KEBG) recorded heat indices reaching or exceeding 111 degrees between 12:55PM CDT and 4:55PM CDT the afternoon of August 13th.

Heat in COASTAL CAMERON, TEXAS
From 11-AUG-23 11:53:00 to 11-AUG-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 August 11th.

Heat in COASTAL CAMERON, TEXAS
From 13-AUG-23 10:53:00 to 13-AUG-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 11:53 AM CDT, with 111 or higher values persisting until approximately 3:53 PM CDT on August 13th.

Heat in COASTAL WILLACY, TEXAS
From 13-AUG-23 10:53:00 to 13-AUG-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 11:53 AM CDT, with 111 or higher values persisting until approximately 3:53 PM CDT on August 13th. By proxy, it can be assumed that Coastal Willacy County had similar conditions.

Heat in COASTAL CAMERON, TEXAS
From 12-AUG-23 08:30:00 to 12-AUG-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 9:30 AM CDT, with 111 or higher values persisting until approximately 4:53 PM CDT on August 12th.