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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 crucial for all aviation stakeholders, including pilots, meteorologists, and air traffic controllers, providing vital "ground truth" for real-time weather conditions and directly influencing significant advisories like SIGMETs.
  • PIREPs are incorporated into automated weather guidance products (e.g., CIP, GTG) and require specificity regarding altitude and conditions (e.g., in/out of clouds) to be most effective.
  • The value of PIREPs is highly time-sensitive; reports for icing become largely irrelevant after 75 minutes, and turbulence reports after 45 minutes, underscoring the need for frequent and current submissions.
  • Pilots are strongly encouraged to file PIREPs regularly, even for uneventful conditions, using methods such as Flight Service, online portals, or dedicated apps like Virga, as their contribution significantly enhances overall aviation safety and weather accuracy.
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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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