NASA's TRMM satellite noticed towering thunderstorms within Katia yesterday which clued forecasters that she would become a hurricane today. NASA's Aqua satellite showed strong thunderstorms around Katia's center today as the hurricane continues to strengthen.
TRMM captured a rainfall image of Tropical Storm Katia on August, 31, 2011 2:29 p.m. EDT. Yellow and green indicate rainfall between 20 and 40 millimeters (.78 to 1.57 inches) per hour. Dark red areas are considered heavy rainfall, as much as 50 mm (2 inches) of rain per hour. Credit: SSAI/NASA, Hal Pierce
The Tropical Rainfall Measuring Mission (TRMM) satellite can measure rainfall from its orbit high above the earth and provide heights of towering thunderstorms within a tropical cyclone. Yesterday, August 31, 2011 at 2:29 p.m. EDT (18:29 UTC) TRMM revealed several towering thunderstorms even in Katia's outer bands- that were about 6 miles (10 kilometers) high.
On September 1, the Atmospheric Infrared Sounder (AIRS) instrument on NASA's Aqua satellite showed large areas of strong convection surrounding center. Convection is rapidly rising air that forms the thunderstorms that make up a tropical cyclone. The cloud top temperatures around Katia's center were colder than -63F (-52C) revealing that there's powerful uplift in the atmosphere to create high, cold clouds. AIRS also showed that the sea surface temperatures in the region are over the 80F (26.6C) threshold needed to maintain a tropical cyclone, so that the energy source for Katia remains plentiful and will enable her to strengthen over the weekend.
Katia is a now a Category one hurricane and is expected to bend north-northwest and miss the Leeward Islands. Maximum sustained winds are near 75 mph (120 kmh) with higher gusts, and some strengthening is forecast over the weekend. Katia is still a small storm about 250 miles wide, with hurricane force winds out to 25 miles from the center (35 km) and tropical storm force winds out to 125 miles (205 km).
The National Hurricane Center noted that Katia could become a major hurricane (Category three) over the weekend.
At 11 a.m. EDT on Sept. 1, Katia's center was still far from land. It was about 1050 miles (1,685 km) east of the Leeward Islands, near 15.5 North and 47.5 West. It was moving to the west-northwest near 18 mph (30 kmh) and is expected to slow down.
The National Hurricane Center said Katia is forecast to become a major hurricane on Sunday with winds over 111 mph. It will be between Puerto Rico and Bermuda so NASA will be watching it for the next week.
Text credit: Rob Gutro, NASA's Goddard Space Flight Center, Greenbelt, Md.
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
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...
Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...
UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration
"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
17.01.2017 | Earth Sciences
17.01.2017 | Machine Engineering
17.01.2017 | Physics and Astronomy