On November 12 at 4 a.m. EST the National Hurricane Center issued the last advisory on Extra-Tropical Cyclone Kate, located several hundred miles south-southeast of Cape Race, Newfoundland. NOAA's GOES-East satellite captured a visible light image of the storm.
A NOAA GOES-West satellite visible image extra-tropical storm Kate on Nov. 12 at 1445 UTC (9:45 a.m. EST) showed the storm over 400 miles southeast of Newfoundland, Canada. Most of the clouds associated with the post-tropical storm were north and east of the center. Forecaster Beven of the National Hurricane Center said, "Satellite imagery indicates that Kate has merged with a baroclinic zone over the north Atlantic and is now an extratropical cyclone."
Kate Reached Hurricane Strength
On Nov. 10, the RapidScat instrument that flies aboard the International Space Station saw Hurricane Kate north of the Bahamas and its strongest winds were north of the center. Maximum sustained winds in both areas were as strong as 30 meters per second (67 mph/108 kph). On Nov. 11, those winds increased to hurricane force. Hurricane force winds extended outward up to 35 miles (55 km) from the center and tropical storm force winds extend outward up to 205 miles (335 km).
At 10 a.m. EST (1500 UTC) on Nov. 11 the center of Hurricane Kate was located near latitude 36.8 North, longitude 60.5 West. That put Kate's center about 395 miles (635 km) northeast of Bermuda and about 780 miles (1,260 km) south-southwest of Cape Race Newfoundland.
An Infrared Look at Kate
On Nov. 12 at 05:17 UTC (12:17 a.m. EST) infrared imagery from the Atmospheric Infrared Sounder or AIRS instrument aboard NASA's Aqua satellite showed fragmented strong storms east and north of Kate's center where cold cloud top temperatures were near -63F/-53C. Storms with cloud tops that cold (and high in the troposphere) have been shown to generate heavy rain.
Aqua satellite showed fragmented strong storms east and north of Kate's center.
Kate Weakens and Becomes Extra-Tropical
At 4 a.m. EST on Nov. 12, Kate was classified as an extra-tropical storm. That means that a tropical cyclone has lost its "tropical" characteristics. The National Hurricane Center defines "extra-tropical" as a transition that implies both poleward displacement (meaning it moves toward the north or south pole) of the cyclone and the conversion of the cyclone's primary energy source from the release of latent heat of condensation to baroclinic (the temperature contrast between warm and cold air masses) processes. It is important to note that cyclones can become extratropical and still retain winds of hurricane or tropical storm force.
At 4 a.m. EST on Nov. 12, Kate's maximum sustained winds were near 60 knots (70 mph). Kate was centered near 40.7 degrees north latitude and 50.8 degrees west longitude, about 430 miles south-southeast of Cape Race, Newfoundland, Canada. Kate was moving to the east-northeast at 23 knots (26 mph). Minimum central pressure was 983 millibars. The post-tropical cyclone is expected to accelerate toward the east-northeast and northeast.
The National Hurricane Center expects extra-tropical storm Kate to continue weakening, but slowly over the next couple of days. The NHC forecast keeps maximum sustained winds near 45 knots (50 mph) through Nov. 15 and by Nov. 16, Kate is expected to become absorbed by an extra-tropical low pressure area.
Additional information on this system can be found in High Seas Forecasts issued by the National Weather Service at http://www.
Rob Gutro | EurekAlert!
More than 100 years of flooding and erosion in 1 event
28.03.2017 | Geological Society of America
Satellites reveal bird habitat loss in California
28.03.2017 | Duke University
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
28.03.2017 | Life Sciences
28.03.2017 | Information Technology
28.03.2017 | Physics and Astronomy