Tropical Storm Mirinae had maximum sustained winds near 52 mph on Tuesday, October 27 at 1200 UTC (8 a.m. EDT). It was located about 205 nautical miles northwest of Guam, so all of the watches and warnings for Guam have been discontinued. Its center is near 15.6 North latitude and 142.2 East longitude. Mirinae was moving west-northwest near 19 mph.
This NASA AIRS microwave image of Mirinae from Oct. 27 shows the development of an eye (purple area resembling a half moon). Cold areas (yellow-green) indicate precipitation or ice in the cloud tops. The purple area has the coldest cloud temperatures (as cold as -63F), and suggest cloud tops are near the tropopause. Credit: NASA JPL, Ed Olsen
The microwave image revealed cold areas in the storm that indicate ice in cloud tops, and heavy precipitation. Because winds are strongest around the eye, that's where you would also likely find the most powerful thunderstorms and rotation, so it makes sense that around the developing eye are the coldest cloud temperatures, as cold as -63F. Microwave data suggests cloud heights to the 200 millibar level, near the tropopause.
Tropical Storm Mirinae continues to move west-northwest, away from the Northern Marianas and toward the Philippines. The storm is forecast to strengthen on its westward track, so residents in the Philippines need to prepare for its arrival toward the end of the week.
Rob Gutro | EurekAlert!
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