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RADAR Revisited

This NEXRAD WSR-88D radar site at Oklahoma City is typical of the 160 sites. (Tim Vasquez photo)
Gemini Sparkle

Key Takeaways:

  • Pilots must understand the source and type of radar data (e.g., NEXRAD mosaic vs. single-site, base vs. composite reflectivity) to accurately interpret weather information and ensure safety.
  • Composite reflectivity is generally recommended for pilots to identify hazardous weather, displaying maximum intensity, while high reflectivity (reds/whites) and tight reflectivity gradients are key indicators of dangerous storm characteristics like strong updrafts and severe turbulence.
  • Understanding storm organization is crucial; discrete cells are prime candidates for severe weather, and bowing segments or breaks in squall lines indicate strong winds and potential tornadoes.
See a mistake? Contact us.

Just 40 years ago, a pilot’s only real access to live radar data was in the cockpit of a sophisticated multi-engine aircraft. But thanks to rapid advances in technology and computer networks, anybody carrying a smartphone has access to nearly all of the data from the federal government’s $3 billion radar network. Add ADS-B In to the mandated Out, and you can reliably get all this data when airborne. This radar network is known as NEXRAD, Next Generation Radar, and is made up of 160 WSR-88D radar sites.

While this provides great convenience and helps pilots breathe easy, the fact remains that the United States has some of the most dangerous convective storms in the world. It’s essential that every pilot knows not only how to get the data, but also how radar works, to understand what they’re seeing, and where interpretation might go wrong. There’s more to it than just looking for the red spots.

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