Posted: 6/24/2009 3:49:42 PM EDT
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http://radar.weather.gov/Conus/full_loop.php
What is going on at the southern border of Nebraska in this radar loop? I've never seen a radiating circular weather pattern like this. Edit: for those of us geographically challenged, it is just West (left) of Iowa, which is just left of Illinois. |
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Gust front.
Down draft causes that. http://en.wikipedia.org/wiki/Gust_front 
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It's just changing appearance of ground clutter around the radar site.
http://www.wunderground.com/radar/map.asp Here's the weather radars, there's one right in the center of that "ring". |
| Yeah, the expanding rings are station centric, there are arc segments elewhere on the map doing the same thing. Doppler radar only indicates moving stuff, not a simple return, as such there's all sorts of filters and processing between the signal and thedisplay. As such there's lots of artifacts like that, just like the stationary fuzzball over South Dakota. |
It has begun!
