05/22/2026
https://www.facebook.com/share/p/1B9qUWi5DF/
Radar technology has improved tremendously over the years and has helped save countless lives, but it still has limitations.
One thing many people don’t realize is that not every tornado will show a classic, obvious radar signature. Some tornadoes can develop very quickly between radar scans, remain rain-wrapped, occur far from radar sites, or stay weak/brief enough that low-level rotation is difficult to detect clearly in real time.
A documented example of this occurred during the May 4, 2007 Greensburg, Kansas EF5 tornado event.
While the main Greensburg tornado had strong radar signatures, later research conducted using storm surveys, mobile radar analysis, and video evidence found that multiple smaller satellite tornadoes developed around the main circulation. Some of these smaller tornadoes had weak, subtle, or rapidly evolving radar signatures that were difficult to identify clearly in real time.
Research presented through NOAA-supported studies and the American Meteorological Society later showed that several of these satellite tornadoes developed outside of the main hook echo and within complex areas of rotation surrounding the parent tornado.
The graphic attached to this post is an educational illustration designed to explain the concept discussed above. The radar image shown is NOT a real archived radar scan from the Greensburg event or any actual tornado event.
This post is meant purely for weather education and awareness.
Radar is an incredibly powerful tool, but it is not perfect, which is why tornado warnings should always be taken seriously — even if radar images online do not always show a dramatic or perfectly defined velocity signature.
Storm spotters, emergency managers, meteorologists, researchers, the National Weather Service, SPC forecasters, and countless others throughout the years have all played major roles in improving tornado detection, warning operations, public awareness, and severe weather safety across the United States.
Sources used for this educational post include:
• NOAA / National Weather Service
• NOAA National Severe Storms Laboratory (NSSL)
• Storm Prediction Center (SPC)
• American Meteorological Society research related to the Greensburg tornado
• National Weather Service radar limitation documentation