As Super Typhoon Halong tracks north through the Northwestern Pacific Ocean, NASA's Aqua and Terra satellites have seen the powerful storm appear to wink at space as it developed and "opened" an eye and then close its eye as clouds moved over it. That wink appears to be a sign of eyewall replacement in the powerful storm.
On August 2 at 01:45 UTC (August 1 at 9:45 p.m. EDT) NASA's Terra satellite captured a visible image of a wide-eyed Super Typhoon Halong moving through the Northwestern Pacific Ocean. At the time of the image, Halong was a powerful Category 5 Super Typhoon on the Saffir-Simpson Scale. Satellite data showed that Halong had a 10-nautical mile (11.5 mile/18.5 km) wide eye.
On August 4 at 12:40 a.m. EDT NASA's Aqua satellite captured this visible image of Typhoon Halong and its cloud-filled eye as it continued tracking north toward Japan.
Image Credit: NASA Goddard MODIS Rapid Response Team
On August 4 at 04:40 UTC (12:40 a.m. EDT), NASA's Aqua satellite captured a visible image of Super Typhoon Halong that showed its eye had become cloud filled. The image also showed that the bulk of strongest bands of thunderstorms were over the southern quadrant of the storm.
Forecasters at the Joint Typhoon Warning Center or JTWC noted that microwave satellite imagery suggests an on-going eyewall replacement. That's when the thunderstorms that circle the eye of a powerful hurricane are replaced by other thunderstorms. Basically, a new eye begins to develop around the old eye.
Many intense hurricanes undergo at least one of these eyewall replacements during their existence. JTWC noted that the eyewall replacement correlates to the recent weakening trend.
On Monday, August 4, Super Typhoon Halong's maximum sustained winds had dropped to near 105 knots (120.8 mph/190.4 kph), making it a Category Two hurricane on the Saffir-Simpson Scale. On August 3, Halong was a Super Typhoon with maximum sustained winds near 130 knots (149.6 mph/240.8 kph) on August 3, which made it a Category Four storm.
On August 4, Halong was centered near 17.3 north and 130.3 east, about 588 nautical miles (676.7 miles/1,089 km) south-southeast of Kadena Air Base, Okinawa, Japan. Halong was moving northwest at 4 knots (4.6 mph/7.4 kph). Because Halong is such a powerful storm, it is generating extremely rough seas. The Joint Typhoon Warning Center noted that wave heights were near 42 feet (12.8 meters).
The JTWC expects Halong to continue moving in a northerly direction for the next couple of days.
Text credit: Rob Gutro
NASA's Goddard Space Flight Center
Rob Gutro | Eurek Alert!
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
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
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,...
21.07.2017 | Event News
19.07.2017 | Event News
12.07.2017 | Event News
24.07.2017 | Power and Electrical Engineering
24.07.2017 | Materials Sciences
24.07.2017 | Materials Sciences