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What is a heat dome? Here’s how high pressure affects San Antonio weather

What is a heat dome? Here’s how high pressure affects San Antonio weather
Photo: KSAT 12 (ABC affiliate) · view original

When temperatures soar for days or weeks, meteorologists often describe the pattern as a heat dome — a large area of high pressure that traps hot air near the surface, creating a prolonged stretch of extreme heat. How does a heat dome form? A heat dome forms when a strong high-pressure system set...

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