Birdwatch Note Rating
2025-07-29 19:12:18 UTC - HELPFUL
Rated by Participant: D92B2FC2A7B57525C300551064CB7A8BB9F0B411C69B7BC2051B2D690B02C85E
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Original Note:
This is an example of anomalous propagation, specifically radar beam ducting due to superrefraction. High heat and humidity reduce the atmospheric refractive index with height, causing the radar beam to bend downward and reflect off the ground, producing false echoes. https://www.noaa.gov/jetstream/anomalous-propagation https://www.noaa.gov/jetstream/radar-beams https://www.meteor.iastate.edu/~jdduda/portfolio/How%20to%20read%20and%20interpret%20weather%20radar.pdf https://radarscope.zendesk.com/hc/en-us/articles/4416730029330-Ground-Clutter-and-Other-Stuff-What-You-Can-See-on-Radar-Other-Than-Rain https://www.meteor.iastate.edu/classes/mt432/lectures/ISURadarTalk_NWS_2013.pdf
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