---
title: "PREDICTIVE WIND SHEAR ALERT SYSTEM (PWS) — aviation glossary — OnlyPlanes"
description: "A self‐contained system used on board some aircraft to alert the flight crew to the presence of a potential wind shear."
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locale: en
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  "og:title": "PREDICTIVE WIND SHEAR ALERT SYSTEM (PWS) — aviation glossary"
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Safety

# PREDICTIVE WIND SHEAR ALERT SYSTEM (PWS)

PWS

TERM · Safety

At a glance

## Meaning of PREDICTIVE WIND SHEAR ALERT SYSTEM (PWS)

A self‐contained system used on board some aircraft to alert the flight crew to the presence of a potential wind shear.

### More about PREDICTIVE WIND SHEAR ALERT SYSTEM (PWS)

A self‐contained system used on board some aircraft to alert the flight crew to the presence of a potential wind shear. PWS systems typically monitor 3 miles ahead and 25 degrees left and right of the aircraft's heading at or below 1200' AGL. Departing flights may receive a wind shear alert after they start the takeoff roll and may elect to abort the takeoff. Aircraft on approach receiving an alert may elect to go around or perform a wind shear escape maneuver.

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