NASA satellites show heavy rainfall at southeastern coast of Japan

Jul 19, 2011
The TRMM satellite captured the rainfall rates occurring within Typhoon Ma-on (before it weakened) on July 19. The red areas are heavy rainfall, falling at a rate of 2 inches (50 mm) per hour. The yellow and green areas indicate moderate rainfall between .78 to 1.57 inches (20-40 mm) per hour. Credit: NASA/SSAI, Hal Pierce

Some of the strongest thunderstorms within Typhoon Ma-on are now affecting the southeastern coast of Japan and appeared on satellite imagery from two NASA satellites. Rough surf, gusty winds and heavy rainfall is affecting eastern coastal Japan today.

NASA's Aqua satellite passed over Typhoon Ma-on early on July 19, at 0347 UTC (11:47 p.m. EDT on July 18) and imagery from the Atmospheric Infrared Sounder (AIRS) instrument showed a large area of very cold cloud top temperatures from strong thunderstorms to the east and south of the center. As Ma-on moved near the island of Shikoku today, infrared satellite data showed the cloud tops warmed (dropped in height). That's because Ma-on was interacting with the land and wind shear increased, weakening the strength of convection (that builds the thunderstorms).

The other satellite that noticed the heavy rainfall associated with Typhoon Ma-on is operated by both NASA and the . That's appropriate because the heavy rains are falling over southeastern Japan. The Measuring Mission (TRMM) satellite observed rainfall rates in Ma-on on July 18, 2011 at 2306 UTC (7:06 p.m. EDT) and again on July 19, 2011 at 0221 UTC (July 18 at 10:21 p.m. EDT).

The used TRMM's (TMI) and (PR) data from both orbits. The rainfall from early July 19 shows that bands of very heavy rainfall of over 50 mm (~2 inches) were falling over both of the Japanese island of Shikoku and Honshu. At that time, Ma-on's winds had weakened to about 67 kts (~77 mph) making it a category 1 typhoon on the Saffir/Simpson scale.

This infrared image of Tropical Storm Ma-on was captured from the AIRS instrument on NASA's Aqua satellite on July 19 at 0347 UTC (11:47 p.m. EDT on July 18) and it revealed a large area of very cold cloud top temperatures (purple) from strong thunderstorms to the east and south of the center. Credit: Credit: NASA/JPL, Ed Olsen

At 1500 UTC (11 a.m. EDT) on July 19, Typhoon Ma-on's were near 55 knots. Tropical storm-force winds extended out to 140 miles from the storm's center. Ma-on was moving to the northeast near 10 knots. It was about 300 miles west-southwest of Yokosuka, Japan near 33.3 North and 134.2 East. At that time, it was brushing the island of Shikoku's southern coast near Muroto Point. Shikoku one of four islands in the four main islands of Japan, and is the smallest. It is located south of Honshu.

Ma-on is expected to continue weakening and is now expected to recurve to the east-southeast and head back to sea sometime on July 20.

Explore further: Canada to push Arctic claim in Europe

add to favorites email to friend print save as pdf

Related Stories

Typhoon Ma-on's eye seen in NASA satellite Images

Jul 15, 2011

The eye of a tropical cyclone is an indication of a strong storm, and Typhoon Ma-on's eye was apparent in visible and infrared imagery captured by NASA's Aqua satellite. Ma-on just achieved Category Four status ...

Recommended for you

Canada to push Arctic claim in Europe

7 hours ago

Canada's top diplomat will discuss the Arctic with his Scandinavian counterparts in Denmark and Norway next week, it was announced Thursday, a trip that will raise suspicions in Russia.

Severe drought is causing the western US to rise

12 hours ago

The severe drought gripping the western United States in recent years is changing the landscape well beyond localized effects of water restrictions and browning lawns. Scientists at Scripps Institution of ...

A NASA satellite double-take at Hurricane Lowell

12 hours ago

Lowell is now a large hurricane in the Eastern Pacific and NASA's Aqua and Terra satellites double-teamed it to provide infrared and radar data to scientists. Lowell strengthened into a hurricane during the ...

User comments : 0