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ABC 10News Pinpoint Weather with Meteorologist Megan Parry

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985 views37likes3:36abc10newsOriginal Release: 2026-07-21

A heat dome is a persistent high-pressure system that traps hot air over a region, causing temperatures to remain elevated both day and night with minimal cooling during overnight hours. In this forecast, the heat dome is expected to maintain temperatures 5-10°F above normal across the San Diego area, with coastal regions experiencing mid-70s to low 80s, inland neighborhoods reaching 90s, and desert communities hitting 110-117°F. The extended heat wave, lasting from tomorrow through Monday, demonstrates how atmospheric pressure patterns can create sustained warm conditions that affect different geographic zones differently based on elevation and proximity to water bodies.