Pilot Proficiency

Everything Explained: Thunderstorm Avoidance, Penetration and Survival

Monday, June 05, 2017 at 10:49 PM ET

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Thunderstorm visible from a cockpit [Getty Images]

Key Takeaways:

When avoiding thunderstorms without onboard radar, prioritize visual cues (VFR conditions on top or below, dark skies, lightning) and seek real-time information from ATC and PIREPs.
In-cockpit Nexrad data (FIS-B) is significantly delayed (up to 15-20 minutes) and depicts where weather *was*, not where it *is*, making it unsuitable for tactical avoidance of fast-moving severe weather.
If inadvertently penetrating a thunderstorm, immediately slow to maneuvering speed, keep wings level, activate anti-ice, and be prepared to deploy landing gear for stability; inform ATC of the emergency without delay or permission.

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Thunderstorm Avoidance without Onboard Radar: