Houston could see its first heat advisory of the summer this weekend

Houston could get its first heat advisory of the summer this weekend as hot, humid air pushes the heat index toward the National Weather Service threshold of 108 degrees.

That would mark a shift from last summer, when Houston went through the entire season without a heat advisory, according to the Houston Chronicle's forecast reporting.

The immediate setup is a familiar June pattern for Southeast Texas: high temperatures, very high humidity and some afternoon thunderstorms. The combination matters because the heat index, not the thermometer reading alone, is what drives advisory-level heat risk.

Heat and humidity

Forecasters said the heat index in Houston may approach 108 degrees this weekend, which is the level used for a heat advisory. The advisory is possible, not guaranteed.

That matters for people working outdoors, attending events or relying on limited cooling. Heat illness risk rises quickly when high temperatures and humidity build together.

Tropical moisture nearby

A separate weather feature is also on forecasters' radar: a disturbance in the Bay of Campeche.

The National Hurricane Center is monitoring it with a 10% chance of tropical development over the next seven days and nearly zero chance over the next 48 hours. Forecasts say it is expected to move inland over eastern Mexico by late weekend, which limits its chance to strengthen over water.

Even without direct development, the system could still feed more tropical moisture into Southeast Texas and raise rain chances early next week.

What to watch

The key questions are whether the National Weather Service issues a heat advisory for Houston this weekend, how much moisture reaches the region early next week and whether the disturbance stays weak as it moves inland.

For now, the main public-health concern is the potential for advisory-level heat. The wetter pattern may follow later if tropical moisture spreads north.