Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Danielle now a Category 2 hurricane, NASA satellites working in high gear

NASA's Aqua, Terra and TRMM satellites are providing data on Hurricane Danielle daily, and forecasters are using that data to help determine Danielle's behavior and movement. At 5 p.m. EDT yesterday, August 23, when Danielle became a hurricane, these NASA satellites fed forecasters data on cloud extent and formation, cloud top temperatures, pressure, sea surface temperatures, rainfall rates within the storm and more factors.
By 5 a.m. EDT today, August 24, Danielle had reached Category 2 status on the Saffir-Simpson Scale. That means that it has maximum sustained winds between 96-110 mph (83-95 knots), and has "Extremely dangerous winds will cause extensive damage" if it impacts land areas. For more information about the Saffir-Simpson Hurricane scale, go to:

The Tropical Rainfall Measuring Mission satellite (TRMM) has been measuring Danielle's rainfall from space since it developed. On Monday, August 23 at 05:38 UTC (1:38 a.m. EDT) TRMM flew directly over Danielle and measured its rainfall with the TRMM Microwave Imager (TMI) instrument. At that time, there was a large area of moderate to heavy rainfall of over 50 mm/hr (~2 inches) in Danielle around it's center. The rainfall images are at NASA's Goddard Space Flight Center in Greenbelt, Md.

On August 23 at 16:17 UTC (12:17 p.m. EDT) an infrared image of Hurricane Danielle's clouds from the Atmospheric Infrared Sounder (AIRS) instrument aboard NASA's Aqua satellite showed a tightly compact cyclone. The strongest convection and thunderstorms appeared as a large circle in the inside of the storm. The thunderstorms were so high, and powerful that the infrared data measured their temperatures as cold as or colder than -63 Fahrenheit. NASA's Jet Propulsion Laboratory in Pasadena, Calif. creates the images from the AIRS instrument.

Another instrument on NASA's Aqua satellite helped find the center of Danielle early this morning. At 04:34 UTC (12:34 a.m. EDT), Danielle's eye (that developed yesterday) was no longer evident, indicating that it was obscured by clouds. Using the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) instrument that flies on Aqua, microwave imagery helped locate the center and confirmed that Danielle's center was just left of the previous estimate.

One hour and fifteen minutes after Aqua's AIRS instrument captured an infrared image, the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on NASA's Terra satellite captured a high-resolution visible image of Danielle. MODIS images are created by the MODIS Rapid Response Team at NASA Goddard. The data that was captured on August 23 at 1:50 p.m. EDT also showed a compact, rounded, tropical storm Danielle. Danielle became a hurricane just over three hours later.

At 5 a.m. EDT on August 24, Danielle became a category 2 hurricane with maximum sustained winds of 100 mph. Hurricane-force winds currently extend 30 miles out from the center, while tropical storm-force winds extend 115 miles from the center.

Danielle is moving west at 20 mph, and was still far away from land areas. Danielle's center was located about 1,110 miles east of the Lesser Antilles near 15.9 North and 44.6 West. A turn toward the west-northwest and then northwest is expected by early Wednesday, according to the National Hurricane Center, Miami, Fla. Danielle's estimated minimum central pressure is 973 millibars.

Global computer models show Danielle remaining in an environment with low vertical wind shear for the next 24 hours over warm water temperatures between 28 and 29 Celsius (82 and 84 FahreLow wind shear and warm waters help power a tropical cyclone (the general name for tropical depressions, tropical storms and hurricanes). Those factors are expected to help Danielle continue to intensify over the next 24 hours, so Danielle could become a major hurricane (Category 3) by Wednesday, August 25.

For all tropical cyclone updates from NASA's Hurricane page:

Rob Gutro | EurekAlert!
Further information:

More articles from Earth Sciences:

nachricht UCI and NASA document accelerated glacier melting in West Antarctica
26.10.2016 | University of California - Irvine

nachricht Ice shelf vibrations cause unusual waves in Antarctic atmosphere
25.10.2016 | American Geophysical Union

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

How nanoscience will improve our health and lives in the coming years

27.10.2016 | Materials Sciences

OU-led team discovers rare, newborn tri-star system using ALMA

27.10.2016 | Physics and Astronomy

'Neighbor maps' reveal the genome's 3-D shape

27.10.2016 | Life Sciences

More VideoLinks >>>