Heat in Coastal Cameron, Texas

The Automated Surface Observing System at Cameron Co. Airport in coastal Cameron County reached a peak heat index of 114F during the afternoon, with up to 7:30 hours of values reaching advisory levels (111 to 114F in this case).

As developing Tropical Storm Arthur moved along the middle Texas coast (June 17) and as a degenerated low pressure system along the Louisiana Coast (June 18), very hot air descended on the southern tip of Texas, with record extreme heat index, or feels-like, temperatures for the entire region on the 18th. The high heat index values held on into June 19th, before unsettled weather brought slightly lower temperatures and pockets of rain by the 20th, which ended the short but brutal window of extreme heat.