Mirinae intensifying while moving away from the northern Marianas

Oct 28, 2009
Microwave images are created when data from NASA's Aqua satellite AIRS and AMSU instruments are combined. The cold areas in this image (yellow-green) indicates where there is precipitation or ice in the cloud tops. This microwave image of Typhoon Mirinae suggests cold, high thunderstorms have developed and an eye is forming. Credit: NASA JPL, Ed Olsen

Typhoon Mirinae is moving west and away from the Northern Marianas Islands on a track to a landfall in the Philippines by the weekend. As Mirinae has moved west, NASA's infrared and microwave satellite imagery have seen high, strong thunderstorm development, and a developing eye.

Typhoon Mirinae's are now up to 98 mph (157 km/hr), and its center is approximately 930 nautical miles (that's 1,070 miles or 1,722 kilometers) east of Manila, Philippines. The coordinates of its center are 16.2 North latitude and 136.9 East longitude. Mirinae is moving west at 17 mph.

Tropical storm-force winds extend out to 100 miles from Mirinae's center, while typhoon/hurricane-force winds extend 20 miles out from its center. Mirinae is stirring up waves up to 22 feet high.

Mirinae is intensifying in part because of "strong radial outflow and warm sea surface temperatures," according to forecasters at the U.S. Navy's Joint Warning Center (JTWC). JTWC is the organization that forecasts storms in the Western Pacific Ocean. Radial outflow is important in a tropical cyclone development because it spreads ice particles outward from the center of the storm, spreading clouds and precipitation. Basically it helps the storm grow larger.

NASA's Aqua satellite captured cold thunderstorm cloud tops of Mirinae in this infrared image Oct. 28 at 12:35 a.m. local Asia/Manila Time (Oct. 27 at 12:35 p.m. EDT). The system now has the developed signature shape of a mature tropical cyclone. Credit: NASA JPL, Ed Olsen

The Atmospheric Infrared Sounder (AIRS) instrument on NASA's Aqua satellite captured a microwave and infrared image of Mirinae on October 28 at 12:35 a.m. local Asia/Manila Time.

The revealed that the cloud tops of Mirinae are close to the top of the troposphere. That means they are strong thunderstorms, where temperatures are colder than -63 Fahrenheit.

AIRS data is also coupled with data from the Advanced Microwave Sounding Unit (AMSU) that flies with AIRS on Aqua to create microwave images of storms. The AMSU image uses the radiances of the 89 GHz channel, and the cold areas in those images indicate where there is precipitation or ice in the cloud tops.

Mirinae has intensified steadily and will continue to do so until landfall in the Philippines on Saturday. Landfall in Luzon between the cities of Soliven and San Jose is still expected to occur around 0600 UTC (2 a.m. EDT, 2 p.m. Asia/Manila local time) on Halloween.

Source: NASA/Goddard Space Flight Center

Explore further: Image: Agricultural fires in Angola, West Africa

Related Stories

Luzon expecting a Lupit landfall

Oct 20, 2009

Typhoon Lupit is closing in on northern Luzon, the Philippines, and is expected to make a brief landfall (of about 24 hours) there October 22 before heading into the South China Sea.

Typhoon Choi-Wan swinging by Japan on weekend

Sep 18, 2009

Typhoon Choi-Wan passed the island of Iwo To stirring up heavy surf, hurricane-force winds and torrential, flooding rains. This weekend, it will continue on its northeasterly track paralleling Japan, while ...

Super typhoon Lupit heading west in the Philippine Sea

Oct 19, 2009

Lupit has joined the ranks of super typhoons in the Western Pacific Ocean, and is currently packing maximum sustained winds near 132 mph, down from a previous peak near 149 mph, but still a Category Four strength ...

Recommended for you

Quake rattles nerves in Napa Valley after 2014 disaster

2 hours ago

A magnitude-4.1 earthquake has jolted Napa Valley and became an unwelcome reminder of the wine country's large temblor last summer—the strongest quake to hit Northern California in a quarter-century.

Image: Cambodian rivers from orbit

9 hours ago

A flooded landscape in Cambodia between the Mekong River (right) and Tonlé Sap river (left) is pictured by Japan's ALOS satellite. The centre of this image is about 30 km north of the centre of the country's ...

Image: Agricultural fires in Angola, West Africa

21 hours ago

The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Aqua satellite collected this natural-color image which detected dozens of fires burning in southwestern Africa on May 21, 2015. The location, ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.