At 1700 UTC/1 p.m. EDT on Sept. 20, System 98W was centered about 16.2 north and 146.7 east, about 195 nautical miles north-northeast of Andersen Air Force Base, Guam. System 98W had maximum sustained winds near 25 knots/28.7 mph/46.3 kph.
NASA's TRMM satellite data was combined with infrared imagery from Japan's MTSAT-2 to provide a better picture of the low pressure area and showed that heavy rainfall was occurring over Guam at 0945 UTC.
NASA's Tropical Rainfall Measuring Mission satellite called TRMM passed over System 98W earlier in the day and observed its rainfall.
At the Naval Research Laboratory, NASA's TRMM satellite data was combined with infrared imagery from Japan's MTSAT-2 to provide a better picture of the low pressure area. The TRMM data showed that heavy rainfall was occurring over Guam at 0945 UTC/5:45 a.m. EDT.
Later on Sept. 20, at 3 p.m. EDT, Guam International Airport was still reporting heavy rain, and fog/mist and a temperature of 79F. Winds were blowing from the southwest at 14 mph/22.5 kph, gusting to 18 mph/28/9.
Infrared satellite imagery showed strong convection northeast of the center of circulation and convective banding of thunderstorms southwest of the center. Those thunderstorms in the southwestern bands were affecting Guam.
The Joint Typhoon Warning Center noted that strong vertical wind shear is appearing in the upper-levels of the atmosphere near System 98W. In fact, northeasterly winds are blowing at 30 knots/34.5 mph/55.5 kph. Wind shear can weaken a storm and even tear it apart, and there's even moderate wind shear of up to 20 knots/23 mph/37 kph happening in the storm's center.
The National Weather Service in Guam issued the following bulletin at 12 a.m. CHST on Saturday, Sept. 21, 2013 local time: A tropical disturbance continues to develop in the vicinity of the Marianas. Satellite and radar imagery indicate the heaviest rain associated with the tropical disturbance has shifted to the south and east of the Marianas. However...a brief heavy shower is still possible through Saturday. The latest computer models indicate that much of the weekend will be markedly drier than the past few days. The potential for heavy rainfall will return late Sunday into Monday as this system develops and moves northward. Light to gentle winds tonight will become southwest and increase to 25 to 30 mph by Saturday night as the disturbance moves northward. Offshore seas of 8 to 10 feet tonight will steadily increase to between 11 and 13 feet by Monday as southwest winds increase across the Marianas over the next few days.
Because the low-level center is consolidating the Joint Typhoon Warning Center expects System 98W to become a tropical depression in the next 24 hours. System 98W has been moving to the north and is expected to continue moving in that direction over the next two days.
Rob Gutro | EurekAlert!
Massive impact crater from a kilometer-wide iron meteorite discovered in Greenland
15.11.2018 | Faculty of Science - University of Copenhagen
The unintended consequences of dams and reservoirs
14.11.2018 | Uppsala University
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
19.11.2018 | Event News
09.11.2018 | Event News
06.11.2018 | Event News
19.11.2018 | Life Sciences
19.11.2018 | Life Sciences
19.11.2018 | Event News