NASA's Aqua satellite captured an image of Koppu about 8 hours before its center made landfall, and revealed strong thunderstorms with very cold cloud tops as cold as -63F. Cloud top temperatures are important because they tell forecasters how high thunderstorms are, and the higher the thunderstorm, the more powerful. Those thunderstorms brought heavy downpours which led to minor flooding.
Prior to the Aqua's flight over Koppu at 8 p.m. EDT (4 a.m. local time, Hong Kong), Koppu had maximum sustained winds near 69 mph (60 knots), tropical storm strength. It was 75 miles southwest of Hong Kong, China and moving west-northwest near 14 mph. The Hong Kong Observatory had issued a "No. 8 Southeast Gale or Storm Signal, meaning that winds with mean speeds of 63 kilometres per hour (39 mph) or more are expected from the southeast quarter (of Hong Kong)."
At 2:45 a.m. local time (Hong Kong), the Hong Kong Observatory noted "the maximum sustained winds recorded at Cheung Chau, Chek Lap Kok and Kai Tak were 110, 75 and 71 kilometres per hour (68, 46 and 44 mph) with maximum gusts 131, 108 and 115 kilometres (81, 67, and 71 mph) per hour respectively."
Koppu is expected to weaken quickly to a tropical depression while continuing to move inland in a northwesterly direction.
Text credit: Rob Gutro, NASA/Goddard Space Flight Center
Rob Gutro | EurekAlert!
NASA looks to solar eclipse to help understand Earth's energy system
21.07.2017 | NASA/Goddard Space Flight Center
Scientists shed light on carbon's descent into the deep Earth
19.07.2017 | European Synchrotron Radiation Facility
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....
A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...
Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision
Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...
21.07.2017 | Event News
19.07.2017 | Event News
12.07.2017 | Event News
21.07.2017 | Earth Sciences
21.07.2017 | Power and Electrical Engineering
21.07.2017 | Physics and Astronomy