Nav: Home

NASA provides a 3-D look at Hurricane Seymour

October 26, 2016

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 hurricane wind scale. The pace of hurricane formation 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.

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 maximum sustained winds 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.

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.
-end-
For updated forecasts from NHC, visit: http://www.nhc.noaa.gov.

NASA/Goddard Space Flight Center

Related Hurricane Articles:

Hurricane resilience in the Bahamas
A new Stanford-led study provides information on how to invest in natural coastal ecosystems that the Bahamian government, community leaders and development banks are applying in post-disaster recovery and future storm preparation in the Bahamas.
NASA finds a weaker hurricane Juliette
Hurricane Juliette has been weakening and NASA-NOAA's Suomi NPP satellite provided a look at the strength of storms within.
NASA sees Dorian become a hurricane
NASA's Terra satellite passed over the northwestern Atlantic Ocean as Dorian reached hurricane status during the afternoon of August 28, 2019.
Landslides triggered by Hurricane Maria
Hurricane Maria hit the island of Puerto Rico on 20 September 2017 and triggered more than 40,000 landslides in at least three-fourths of Puerto Rico's 78 municipalities.
NASA sees Atlantic's Leslie become a hurricane
NASA's Aqua satellite captured an infrared image of Hurricane Leslie that revealed strong storms circled the center.
NASA sees Walaka becoming a powerful Hurricane
The Global Precipitation Measurement mission or GPM core satellite passed over the Central Pacific Hurricane Center and analyzed Walaka's rainfall and cloud structure as it was strengthening into a hurricane.
NASA finds a weaker Hurricane Olivia
Infrared data from NASA's Terra satellite revealed that the area of coldest cloud topped thunderstorms has dropped from the previous day, indicating weaker uplift and less-strong storms
NASA looks at heavy rainmaker in Hurricane Lane
Cloud top temperatures provide scientists with an understanding of the power of a tropical cyclone.
Hector weakens but remains Category 4 Hurricane
Hurricane Hector has weakened slightly but still remains a robust Category Four storm at present.
UA forecast: Below-average hurricane activity
The UA hurricane forecasting model, which has proved to be extremely accurate over the years, is calling for fewer hurricanes in the Atlantic this year on the heels of a devastating 2017.
More Hurricane News and Hurricane Current Events

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Rethinking Anger
Anger is universal and complex: it can be quiet, festering, justified, vengeful, and destructive. This hour, TED speakers explore the many sides of anger, why we need it, and who's allowed to feel it. Guests include psychologists Ryan Martin and Russell Kolts, writer Soraya Chemaly, former talk radio host Lisa Fritsch, and business professor Dan Moshavi.
Now Playing: Science for the People

#538 Nobels and Astrophysics
This week we start with this year's physics Nobel Prize awarded to Jim Peebles, Michel Mayor, and Didier Queloz and finish with a discussion of the Nobel Prizes as a way to award and highlight important science. Are they still relevant? When science breakthroughs are built on the backs of hundreds -- and sometimes thousands -- of people's hard work, how do you pick just three to highlight? Join host Rachelle Saunders and astrophysicist, author, and science communicator Ethan Siegel for their chat about astrophysics and Nobel Prizes.