NASA's TRMM satellite sees very heavy rains in fading Tropical Storm Prapiroon

October 18, 2012
Prapiroon's winds had dropped to less than 35 knots (~40 mph) when the TRMM data were collected on Oct. 18. Despite the drop in wind speed, some powerful thunderstorms around Prapiroon's center were still reaching heights above 12 kilometers (~7.6 miles). Credit: SSAI/NASA, Hal Pierce

Heavy rainfall returned to Typhoon Prapiroon for a brief time on Oct. 18 when NASA's TRMM satellite passed overhead. Prapiroon is battling strong wind shear and is expected to transition into an extra-tropical storm in the next day.

NASA's Tropical Rainfall Measuring Mission (TRMM) satellite captured rainfall data on Prapiroon twice on Oct. 18 when it passed overhead. The first orbit was at 0845UTC and the second at 1019 UTC. TRMM's (TMI) and (PR) data show that rain associated with Prapiroon was falling at a rate of over 75mm/hour (~3 inches) in a feeder band northwest of the center of circulation.

Some of the rainfall occurring over Japan on Oct. 18 was being caused by a frontal system that was interacting with tropical Storm Prapiroon.

At NASA's Goddard Space Flight Center in Greenbelt, Md., Hal Pierce of the TRMM team created a 3-D image of the storm using TRMM PR data received with the 1019 UTC (6:19 a.m. EDT) orbit. Prapiroon was once a powerful typhoon with winds of 100 knots (~115 mph). Prapiroon's winds had dropped to less than 35 knots (~40 mph/65 kph) when the were collected. Despite the drop in wind speed, some powerful thunderstorms around Prapiroon's center were still reaching heights above 12 kilometers (~7.6 miles).

By 1500 UTC on Oct. 18, Prapiroon's maximum sustained winds dropped near 35 knots (40 mph/65 kph). Tropical storm Prapiroon was, located approximately 325 nautical miles south-southwest of yokosuka, japan, near 30.9 North latitude and 138.9 East longitude. The storm has accelerated northeastward at 33 knots (38 mph/62 kph) .

Just five hours after the second overpass, the Joint noted that "animated showed deep central convection has unraveled and sheared north of the low level circulation center."

Prapiroon is undergoing transitioning while battling strong wind shear and is expected to become extra-tropical by Oct. 19.

Explore further: NASA eyes Typhoon Prapiroon intensifying

Related Stories

NASA eyes Typhoon Prapiroon intensifying

October 9, 2012

Typhoon Prapiroon is the twenty-second tropical cyclone of the western North Pacific Ocean, making for a very active season. NASA's Terra satellite passed over the storm as it was intensifying into a typhoon and noticed very ...

NASA eyes Typhoon Prapiroon's U-turn

October 10, 2012

Typhoon Prapiroon is making a U-turn in the Philippine Sea, changing direction from northwest to northeast. NASA's Aqua satellite captured an image of the typhoon as it began turning. Visible satellite imagery revealed its ...

Recommended for you

Online shopping might not be as green as we thought

February 5, 2016

Logic suggests that online shopping is "greener" than traditional shopping. After all, when people shop from home, they are not jumping into their cars, one by one, to travel to the mall or the big box store.

In the Southern Ocean, a carbon-dioxide mystery comes clear

February 3, 2016

Twenty thousand years ago, when humans were still nomadic hunters and gatherers, low concentrations of carbon dioxide in the atmosphere allowed the earth to fall into the grip of an ice age. But despite decades of research, ...

0 comments

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.