PHAK · Chapter 12: Weather Theory
FAA · Retrieved 2026-09-05
Educational reference; original Owl summariesWEATHER & ATMOSPHERE
Microbursts
FLIGHT SCIENCE / CONCEPT REFERENCE
SCIENCEConditions & principles
A concentrated downdraft that spreads outward when it reaches the ground.
REFERENCE COVERAGE3 / 3 editorial sections
PROVENANCE1 linked source
LAST RETRIEVED2026-09-05
Editorial section coverage describes the article structure, not scientific validation or completeness.
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01
Mechanism
Descending air accelerates toward the surface and turns into an outward flow. Evaporative cooling can intensify the descending air; significant rain need not reach the ground.
02
Aircraft response
An aircraft crossing the outflow can encounter a headwind increase, a downdraft and then a tailwind. The combined vertical and horizontal changes can sharply reduce climb capability.
03
Context & interpretation
Dry and wet microbursts both matter. Visual precipitation is not a reliable boundary of hazardous airflow. Detection systems and approved aircraft procedures address different parts of the hazard.
Sources & context
Educational explanation of physical mechanisms. Aircraft-specific procedures, limitations and current weather information are separate references.