On February 22 at 6 p.m. ET (21 UTC), the Joint Typhoon Warning Center issued their final advisory on 17P. At that time, its maximum sustained winds were near 34 mph (30 knots) and it continued to weaken. It was still 615 nautical miles east-northeast of the island of Pago Pago, near 12.2 degrees South latitude and 160.8 West longitude.
17P isn't close enough to impact the island of Pago Pago and doesn't appear that it is ever going to get that close. Although the forecast for Pago Pago through the week calls for scattered showers with temperatures in the mid-80s (Fahrenheit), those are convective or pop-up thunderstorms created from daytime heating, and are not associated with Tropical Depression 17P.
NASA's Aqua satellite flew over 17P as it continued to become more disorganized today, February 23 at 1158 UTC (6:58 a.m. ET). The Moderate Resolution Imaging Spectroradiometer (MODIS) instrument onboard Aqua captured in infrared image of the storm. In the satellite image, it was difficult to find a center of the storm.
Animated infrared satellite imagery, such as that from another instrument on Aqua called the Atmospheric Infrared Sounder, or AIRS noticed last night, that the low level circulation of the storm had been separated or "decoupled" from most of the showers and thunderstorms. That's an indication that the storm is becoming less organized and weakening.
Tropical Depression 17P is now in an area of moderate to strong westerly vertical wind shear and that's bad news for any tropical cyclone, because wind shear can tear those storms apart. Wind shear means that the speed or direction of wind changes over a relatively short period of time, or a short distance.
Tropical cyclones develop vertically as rapidly rising air creates thunderstorms. Whenever there's a higher wind shear, the storm is spread over a larger area, and that limits the storm's ability to produce those thunderstorms.
That wind shear is caused by an upper level low pressure area to the southwest of 17P's center. As 17P continues moving south-southwest, atmospheric conditions are going help weaken the storm even more. There's always a chance 17P may redevelop so forecasters will continue watching it, even though the final bulletin has been issued on the storm.
More information about Tropical Cyclone 17P: http://www.nasa.gov/mission_pages/hurricanes/archives/2010/h2010_17P.html
Rob Gutro | EurekAlert!
Water - as the underlying driver of the Earth’s carbon cycle
17.01.2017 | Max-Planck-Institut für Biogeochemie
Modeling magma to find copper
13.01.2017 | Université de Genève
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
18.01.2017 | Power and Electrical Engineering
18.01.2017 | Materials Sciences
18.01.2017 | Life Sciences