NASA's Terra satellite passed over Tropical Depression 18W before it strengthened into Tropical Storm Jelawat late in the day on Sept. 20, in the Philippine Sea (part of the western North Pacific Ocean basin).
The MODIS instrument on NASA's Terra satellite captured this true-color image of Tropical Storm Jelawat on Sept. 20, 2012, at 01:50 UTC, before it had strengthened into a tropical storm. The Philippines is visible in the lower left corner.
Credit: NASA/Goddard/MODIS Rapid Response Team
On Sept. 20 at 01:50 UTC, as the depression was strengthening into a tropical storm, the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on NASA's Terra satellite captured a true-color image of the storm. The MODIS image showed a rounded shape, which indicates good circulation. There was also a band of thunderstorms east of the center of circulation.
On Sept. 21, Tropical Storm Jelawat had maximum sustained winds near 45 knots (51.7 mph/83.3 kph). Jelawat was located about 535 nautical miles east-southeast of Manila, Philippines, near 12.4 north latitude and 129.7 east longitude. It was moving to the west-southwest at 7 knots (8 mph/13 kph).
Forecasters used infrared satellite imagery, such as that from the Atmospheric Infrared Sounder instrument that flies aboard NASA's Aqua satellite to determine the initial position of the tropical storm. Infrared data from Sept. 21, 2012, showed that the strongest convection and coldest cloud top temperatures were in the northwestern and southeastern quadrants of the tropical storm. Those areas were experiencing the heaviest rainfall.
By 10 p.m. local time in Manila, Philippines (10 a.m. Eastern Time/U.S.) on Sept. 21, Jelawat's center was about 311 miles (500 km) east of Catarman capital of Northern Samar, near 12.4 north latitude and 129.7 east longitude. Northern Samar is a Philippine province in the Eastern Visayas region.
The Philippine Atmospheric Geophysical and Astronomical Services Administration issued a bulletin about Jelawat (known locally as Lawin) on Sept. 21 that noted "Estimated rainfall amount is from 10 to 25 mm (0.4 to 0.9 inches) per hour within the 600 km (373 miles) diameter of the Tropical Storm. Fishing boats and other small seacrafts are advised not to venture out into the eastern seaboard of Southern Luzon, Visayas and Mindanao due to big waves generated by Tropical Storm (Jelawat) Lawin."
Jelawat is expected to track slowly west-northwestward over the weekend of Sept. 22 and 23 while the storm intensifies. The forecast track from the Joint Typhoon Warning Center keeps the center of Jelawat at sea, while almost tracking parallel to the Philippines.
Rob Gutro | EurekAlert!
Greenland ice flow likely to speed up: New data assert glaciers move over sediment, which gets more slippery as it gets wetter
17.08.2017 | Swansea University
Climate change: In their old age, trees still accumulate large quantities of carbon
17.08.2017 | Universität Hamburg
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
17.08.2017 | Physics and Astronomy
17.08.2017 | Earth Sciences
17.08.2017 | Physics and Astronomy