Super Typhoon Haiyan (31W) formed on 03 November 2013, and by 18 UTC on 07 November was estimated to have peaked at an intensity of sustained 170 knot winds with gusts to 205 knots. 10.8 m IR channel images from the Korean COMS-1 satellite showed the intense tropical cyclone as it moved westward toward the Philippines. There was a large, nearly symmetric ring of very cold cloud-top IR brightness temperatures in the -80 to -90 C range (violet colors) and at times there were a few isolated pixels colder than -90 C (yellow enhancement).
Image courtesy of COMS-1, SSEC, University of Wisconsin-Madison