NASA provides a 3-D look at Hurricane Seymour

October 26, 2016 by Hal Pierce, NASA's Goddard Space Flight Center
On Oct. 25 at 4:35 p.m. EDT (20:35 UTC) NASA-NOAA's Suomi NPP satellite captured this visible image of Hurricane Seymour in the eastern Pacific Ocean. Credit: NOAA/NASA Goddard MODIS Rapid Response

Hurricane Seymour became a major hurricane on Oct. 25 as the Global Precipitation Measurement mission or GPM core satellite analyzed the storm's very heavy rainfall and provided a 3-D image of the storm's structure.

Hurricane Seymour is the third hurricane in the Eastern Pacific this season to reach category four on the Saffir-Simpson . The pace of in the eastern Pacific Ocean is a slower than during El Nino conditions last year. In the 2015 season the 28th hurricane called Patricia had already occurred. Patricia was the second-most intense tropical cyclone on record worldwide with wind speeds of 187 knots (215 mph). Patricia hit the Mexican coast last year with winds of 150 mph.

The GPM core observatory satellite traveled directly over hurricane Seymour on the morning of October 25, 2016 at 7:46 am PDT (1646 UTC). GPM's Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR) data were used to show the intensity of rainfall within Hurricane Seymour. GPM's radar (DPR Ku Band) revealed that the hurricane had rain falling at the extreme rate of almost 166 mm (6.6 inches) per hour in the southern side of hurricane Seymour's circular eye. GPM is a joint mission between NASA and the Japanese space agency JAXA.

The GPM core observatory satellite traveled directly over hurricane Seymour on Oct. 25 at 7:46 am PDT (1646 UTC). GPM showed rain falling at the extreme rate (red) of almost 166 mm (6.6 inches) per hour in the southern side of hurricane Seymour's circular eye. Credit: NASA/JAXA, Hal Pierce

On Oct. 25 at 4:35 p.m. EDT (20:35 UTC) the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard the NASA-NOAA Suomi NPP satellite captured a visible image of Hurricane Seymour as it became a Category 4 hurricane with near 130 mph (215 kph). The eye of the storm was clearly visible and was surrounded by thick, powerful bands of thunderstorms.

At 11 a.m. EDT (1500 UTC) on Oct. 26 the National Hurricane Center (NHC) reported the center of Hurricane Seymour was located near 16.9 degrees north latitude and 120.2 degrees west longitude. That's about 785 miles (1,265 km) west-southwest of the southern tip of Baja California, Mexico.

Seymour is moving toward the west-northwest near 15 mph (24 kph) and a turn toward the northwest should occur later today, followed by a turn toward the north-northwest with a decrease in forward speed by Thursday, Oct. 27. A turn toward the north with a further reduction in forward speed is forecast by Oct. 28.

This 3-D Flyby animation from data gathered by the GPM core observatory satellite is from its view of Hurricane Seymour on Oct. 25 at 7:46 am PDT (1646 UTC). GPM showed rain falling at the extreme rate (red) of almost 166 mm (6.6 inches) per hour in the southern side of hurricane Seymour's circular eye. Credit: Credits: NASA/JAXA, Hal Pierce

Maximum sustained winds have decreased to near 140 mph (220 kph) with higher gusts. Seymour is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Further weakening is expected, and rapid weakening should begin by tonight or Thursday, Oct. 27. The estimated minimum central pressure is 949 millibars.

NHC Forecaster Kimberlain said "Seymour continues to maintain an impressive central dense overcast, consisting of very deep convection around a 15 nautical mile wide well-defined eye. However, the distribution of convection has become slightly asymmetric since the last advisory, with the greatest coverage to the north and east of the center."

Hurricane Seymour is beginning to move over colder water as it moves northward and start to weaken. Seymour is expected to become a depression over the open waters of the Eastern Pacific on Friday, Oct. 28.

Explore further: NASA sees Hurricane Seymour becoming a major hurricane

Related Stories

NASA animation shows Seymour becomes a hurricane

October 24, 2016

Tropical Depression 20 formed in the Eastern Pacific Ocean on Sunday and by Monday at 11 a.m. it exploded into a hurricane named Seymour. An animation of satellite imagery created by NASA shows the development of the new ...

NASA's GPM examines Category Four Hurricane Lester

August 31, 2016

NASA Peered into Category Four Hurricane Lester using instruments aboard the Global Precipitation Measurement mission or GPM core satellite as it continued tracking through the Eastern Pacific Ocean.

NASA spies major Hurricane Georgette

July 25, 2016

Hurricane Georgette is a major hurricane in the Eastern Pacific Ocean. NASA-NOAA's Suomi NPP satellite provided a visible image of the powerful storm that showed a clear eye.

NASA looks at Eastern Pacific's Category 3 Hurricane Lester

August 30, 2016

NASA satellites provided forecasters with infrared and visible imagery of Major Hurrricane Lester as it continued to move through the Eastern Pacific Ocean. After peaking as a Category 4 hurricane on Aug. 29, Lester weakened ...

Recommended for you

Coffee-based colloids for direct solar absorption

March 22, 2019

Solar energy is one of the most promising resources to help reduce fossil fuel consumption and mitigate greenhouse gas emissions to power a sustainable future. Devices presently in use to convert solar energy into thermal ...

Paleontologists report world's biggest Tyrannosaurus rex

March 22, 2019

University of Alberta paleontologists have just reported the world's biggest Tyrannosaurus rex and the largest dinosaur skeleton ever found in Canada. The 13-metre-long T. rex, nicknamed "Scotty," lived in prehistoric Saskatchewan ...

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.