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A little more explaination: the radar can't tell the difference between
rain drops and flying insects of the same size. This occurs all the time
but is most pronounced around sunset on clear warm-season days/nights when
there are more flying bugs near the height of the radar beam.
I hope that helps!
Originally posted by PistolPete
I posed the question about the radar returns to the guy that runs the website Weatherpages.com, this is what he said:
the radar can't tell the difference between rain drops and flying insects of the same size. This occurs all the time but is most pronounced around sunset on clear warm-season days/nights when there are more flying bugs near the height of the radar beam.
Originally posted by onlyinmydreams
...Not to be mean, though. If I hadn't seen a close-up of the Chicago 'blob' rotate I would probably have signed off on the bug theory myself.
Originally posted by Der Kapitan
Isaid this earlier in this thread and everyone seems to want an UNrational explanation. Temperature inversions and particuliarly humid airmasses CAN and DO show up on radar. Sometimes the weather people call that ground clutter or interference. But, moisture WILL cause radar hits. Sorry it's not the NWO or the UFO. I live in the midwest, saw this the night it was posted, made my comment and no one seemed to even give the simplest reason as the possible cause of these radar hits. Ignorance Denied? Hmmmm.
[edit on 29-9-2004 by Der Kapitan]
Originally posted by The Vagabond
It's not that I'm ignoring the "rational explanations" as you call them, it's simply that I haven't heard a rational explanation yet.
My-Cast Personal Radar - Data from the National Weather Service network of Next Generation Radars (NEXRAD) is updated continuously,...
Occasionally, there will be light blue or green indications around the radar site when there really isn't any noticeable precipitation. This is called ground clutter and is a common radar error, especially in the morning and evening, and in the spring and fall.