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The Ins and Outs of Pilot Weather Reports

PIREPs are those rare commodities that GA pilots yearn for during preflight planning or while en route.

Pilot weather reports, or PIREPs, are those rare commodities that GA pilots yearn for during preflight planning or while en route. [iStock]
Gemini Sparkle

Key Takeaways:

  • Pilot Weather Reports (PIREPs) are critical for aviation safety and planning, providing real-time data on icing, turbulence, and cloud tops for pilots, meteorologists, air traffic controllers, and automated weather systems.
  • PIREPs directly inform the issuance of severe weather advisories (SIGMETs/CWAs) and enhance weather guidance products, with urgent reports often triggering immediate alerts and actions from forecasters.
  • While filing PIREPs can be challenging via traditional radio, modern solutions like online portals and dedicated apps (e.g., Virga) aim to simplify the process, and pilots are encouraged to report despite concerns about potential self-incrimination.
  • For PIREPs to be most effective, they must be specific about conditions and altitudes, as their usefulness diminishes quickly, with icing reports becoming outdated after about 75 minutes and turbulence reports after 45 minutes.
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Every January 1, I tend to have the same New Year’s resolutions that involve losing at least 5 pounds by year’s end, exercising daily, and making at least one pilot weather report on every flight. I do a fair job with the weight and exercise goals but seem to find myself falling short on making those pilot reports. Somehow, I manage to dream up a bunch of lame excuses not to make them.

Pilot weather reports, more simply known as PIREPs, are those rare commodities that general aviation pilots yearn for during preflight planning or while en route using datalink weather. They are vital since they answer these basic questions: At what altitude will I likely encounter ice? What is the severity of those icing conditions? What is the severity of turbulence at my planned altitude? And the most frequently asked question: What altitude will I find the cloud tops?

Scott Dennstaedt, Ph.D

Scott resides in Charlotte, North Carolina, and flies regularly throughout the Mid-Atlantic and Southeast U.S. He is a CFI and former NWS meteorologist. Scott is the author of "The Skew-T log (p) and Me: A Primer for Pilots" and the founder of EZWxBrief.

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