October 23, 2022 - Tropical Storm Roslyn Strengthening off the Coast of
Mexico

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Late in the evening of October 19, 2022, the National Hurricane Center
(NHC) issued an advisory for formation of a depression offshore of
southwestern Mexico. Only twelve hours later, on the morning of October
20, the depression became Tropical Storm Roslyn. The storm travelled
west-northwestward, roughly paralleling the coast of Mexico as it
continued to strengthen, becoming a hurricane on the evening of October
21. Roslyn then rapidly intensified to become a major hurricane.
Hurricane Roslyn is expected to continue to batter the Mexican
coastline through the night of October 22 at Category 4 strength, then
make landfall north of Puerto Vallarta on October 23.

The Moderate Resolution Imaging Spectroradiometer (MODIS) on board
NASA’s Aqua satellite acquired a true-color image of newly-formed
Tropical Storm Roslyn on the morning of October 20. Near that time,
Roslyn carried maximum sustained winds of about 45 mph (72 km/h) and
was about 175 miles (280 km) south of Zihuantanejo, Mexico and about
305 miles (490 km) south-southeast of Manzanillo, Mexico. The center of
the storm was cloud-filled and becoming defined, with ragged and
asymmetric circulation that stretched both to the southwest and
northeast. Storm bands in the northeast quadrant were already bringing
rain to the city of Acapulco, which sits on the Pacific Coast.

At 11:00 p.m. EDT on October 22 (0300 UTC on October 23), the NHC
advised that Hurricane Roslyn’s maximum sustained winds were near 132
mph (212 km/h), which places it as a Category 4 storm on the
Saffir-Simpson Hurricane Wind Scale. Gusts were reaching 161 mph (259
km/h). The center of Hurricane Roslyn was located near latitude 20.0
north, longitude 106.6 west, which is southwest of Puerta Vallarta.
Hurricane warnings were in effect for Playa Perula to Escuinapa and Las
Islas Marias.

The NHC warned that Roslyn is expected to be at or near hurricane
strength when it makes landfall along the west-central coast of Mexico
by October 23. It will be accompanied by damaging wind and dangerous
storm surge. The Global Disaster Alert and Coordination System (GDACS)
states that Roslyn “can have a high humanitarian impact based on the
maximum sustained wind speed, exposed population, and vulnerability”.
They estimate that 350,000 people may be impacted by Category-1-force
winds or higher. Category 1 winds range from 75 to 95 mph (119 to 153
km/h).

Image Facts
Satellite: Aqua
Date Acquired: 10/20/2022
Resolutions: 1km (2.3 MB), 500m (6.4 MB), 250m (4.6 MB)
Bands Used: 1,4,3
Image Credit: MODIS Land Rapid Response Team, NASA GSFC



https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2022-10-23

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