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!
Climate change weakens Walker circulation
20.10.2017 | MARUM - Zentrum für Marine Umweltwissenschaften an der Universität Bremen
Shallow soils promote savannas in South America
20.10.2017 | Senckenberg Forschungsinstitut und Naturmuseen
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
20.10.2017 | Information Technology
20.10.2017 | Materials Sciences
20.10.2017 | Interdisciplinary Research