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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:

  • PIREPs (Pilot Weather Reports) are critical for aviation safety, providing essential "ground truth" for pilots, meteorologists, air traffic controllers, and automated weather products to assess and forecast conditions like icing, turbulence, and cloud tops, directly influencing advisories like SIGMETs.
  • Filing PIREPs can be challenging, but pilots are encouraged to use various methods (Flight Service, online portals, apps) and be specific with details such as altitude and conditions for maximum effectiveness. These reports also have a limited useful lifespan, with icing reports typically becoming obsolete after 75 minutes and turbulence reports after 45 minutes.
  • Despite perceived difficulties or concerns about potential liability, pilots are urged to regularly file PIREPs, even for benign conditions, as the collective benefit to aviation safety and weather forecasting significantly outweighs individual hesitations.
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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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