Satellite finds a 'hook' of heavy rainfall in Hurricane Juliette

September 05, 2019

From its vantage point in orbit around the Earth, when the Global Precipitation Measurement mission or GPM core satellite passed over the Eastern Pacific Ocean, it gathered data on rainfall rates occurring in Hurricane Juliette. The areas of strongest rainfall resembled a hook.

The GPM satellite passed over Juliette on Sept. 5 at 8:46 a.m. EDT (1246 UTC). GPM found the heaviest rainfall in the northwest of thunderstorms circling the center where it was falling at a rate of over 36 mm (about 1.4 inch) per hour. Heavy rainfall of about 25 mm (1 inch per hour) stretched east and south in that same thunderstorm band circling the eye of the storm, giving the appearance of a hook around the storm's eye. GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency, JAXA.

At 5 a.m. EDT (2 a.m. PDT) on Sept. 5, the National Hurricane Center (NHC) noted, "Juliette's cloud pattern has changed little during the past several hours.  If anything, the spiral bands appear to have improved a bit in the western portion of the cyclone." At that time, the center of Hurricane Juliette was located near latitude 20.2 degrees north and longitude 119.1 degrees west. That's about 620 miles (995 km) west-southwest of the southern tip of Baja California, Mexico.

Juliette is moving toward the northwest near 9 mph (15 kph). The hurricane is expected to move to the west-northwest at a slightly faster forward speed on Friday and should continue this motion through Saturday. Maximum sustained winds remain near 90 mph (150 kph) with higher gusts. The estimated minimum central pressure is 976 millibars.

Gradual weakening is forecast to resume today [Sept. 5] as the storm is expected to move over cooler sea surface temperature and encounter dry air and outside winds (vertical wind shear). Further weakening is expected during the next several days.  Juliette should weaken to a tropical storm on Friday.

For updated forecasts, visit:

NASA/Goddard Space Flight Center

Related Hurricane Articles from Brightsurf:

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.

Read More: Hurricane News and Hurricane Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to