July 16, 2022 - Tropical Storm Darby Approaches Hawaii

Hurricane Darby
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Once a fierce Category 4 hurricane carrying winds of 140 mph (225
km/h), Darby had weakened to tropical storm status as it approached the
Big Island of Hawaii in mid-July 2022. The Moderate Resolution Imaging
Spectroradiometer (MODIS) on board NASA’s Terra satellite acquired a
true-color image of Tropical Storm Darby on the morning of July 15.

At 11:00 a.m. EDT (1500 UTC) July 15, the National Hurricane Center
(NHC) advised that Darby had just transitioned from a hurricane to a
tropical storm, with maximum sustained winds of 70 mph (110 km/h). It
was located over the Pacific Ocean about 610 mi (980 km) east southeast
of Hilo, Hawaii and about 810 miles (1,305 km) east southeast of
Honolulu, Hawaii. Darby was moving westward at 16 mph (26 km/h).

Twelve hours later, at 11:00 p.m. EDT July 15 (0300 UTC July 16),
Tropical Storm Darby’s maximum sustained winds had dropped to 45 mph
(75 km/h) as it sped westward at 20 mph (31 km/h). The storm was
located about 400 mi (640 km) east southeast of Hilo and 605 miles (975
km) east southeast of Honolulu, Hawaii.

Although landfall is not expected, large swells generated by Darby are
expected to affect portions of the Hawaiian Islands over the weekend.
The NHC advises that the swells are likely to produce hazardous surf
and dangerous rip current conditions. It is also likely that the parts
of Hawaii may see 2-4 inches (5-10 cm) of rain, especially along the
windward area of the Big Island and windward sections of Maui. Some
flooding may occur in low-lying sections of these areas.

Darby formed over the Pacific Ocean off the coast of Central America on
July 9. As it moved northwestward, it began to intensify. On July 10,
Darby became a Category 1 hurricane then underwent rapid
intensification. By 5:00 p.m. EDT (2100 UTC) on July 11, the National
Hurricane Center declared that Darby was “still small but now a mighty
Category 4 hurricane”. At that time, Hurricane Darby reached peak
strength, carrying maximum sustained winds of 140 mph 9220 km/h). It
was located about 1,135 miles (1,830 km) west southwest of the southern
tip of Baja California, Mexico and was moving westward at 15 mph (24
km/h). By July 12, Hurricane Darby had begun the weakening trend that
still continues.

Image Facts
Satellite: Aqua
Date Acquired: 7/14/2022
Resolutions: 1km (7.9 MB), 500m (7.9 MB), 250m (5.9 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=2022-07-16

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