The infrared Rapid Scan (2.5 minutes a frame) animation presents the evolution of the eye-like feature on a polar low over the Sea of Japan, from 10:00:00 UTC to 15:57:30 UTC on February 10, 2017. Once reaching storm-force, the polar low brought unusually heavy snowfalls to Japan.
AHI images captured by the Japan Meteorology Agency’s Himawari-8 satellite
CC BY 4.0
<a rel="nofollow" class="external text" href="http://www.jma.go.jp/jp/gms150jp/large.html?area=0&amp;element=0">Japan Meteorological Agency</a>