September 12, 2021 - Tropical Storm Conson and Typhoon Chanthu

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Twin storms flanked the northern Philippines on September 9, 2021, each
threatening the islands with strong winds, torrential rains, and
dangerous storm surge. The Moderate Resolution Imaging
Spectroradiometer (MODIS) on board NASA’s Aqua satellite acquired this
true-color image of the green islands caught between Tropical Storm
Conson (west) and Typhoon Chanthu (east).

Tropical Storm Conson, also known as Jolina, first spun up as a
tropical depression well east of the Philippines on September 5. Late
on September 6, the Philippine Atmospheric, Geophysical, and
Astronomical Services Administration (PAGASA) reported that the storm
had rapidly intensified to a typhoon and make landfall in Eastern
Samar, Philippines. Maximum sustained winds were close to 75 mph (120
km/h) at that time. As the storm moved westward, it made additional
landfalls in Daram, Samar; Santo Nino, Samar; Almagro, Samar;
Dimasalang, Masbate; Torrijos, Marinduque; Lobo, Batanges; San Juan,
Batanges; and Mariveles, Bataan before leaving the islands and entering
the West Philippine Sea on September 9. At that time, Tropical Storm
Conson was carrying maximum sustained winds of about 59 mph (95 km/h).
Media reports after the passage of the storm reported power outages on
the islands but minimal damage.

Typhoon Chanthu, also called Kiko in the Philippines, first became a
tropical depression in the early afternoon on September 6, 2021. Within
48 hours, it had increased to super typhoon strength. Wind speeds
accelerated from 50 kilometers (30 miles) per hour to 260 kilometers
(160 miles) per hour. NASA’s Earth Observatory states that, according
to NOAA scientist Sam Lillo, only five storms on record have
intensified at such a rate.

By 11 p.m. Philippine Standard Time (1500 Universal Time) on September
9, the typhoon was about 550 kilometers (300 nautical miles)
east-northeast of Manila, with sustained winds of 220 kilometers (140
miles) per hour. Significant wave heights in the open ocean were
approaching 14 meters (45 feet). Although Chanthu was a compact system
as it passed the Philippines, wind gusts of up to 155 mph (250 km/h)
were reported over the islands.

Late on September 11, the Joint Typhoon Warning Center advised that
Typhoon Chanthu was located about 391 miles (629 km) west-southwest of
Kadena Air Base and was tracking north-northeastward. The storm is
approaching Taiwan, with the center likely remaining just off the
eastern coast on September 12 as it makes its way to a landfall on
mainland China.

On September 11, Tropical Storm Conson had weakened to a tropical
depression as it tracked northwestward in the South China Sea close to
the coast of central Vietnam. It is expected to make landfall over
northern Quang Nam Province, Vietnam, early on September 13.

Image Facts
Satellite: Aqua
Date Acquired: 9/9/2021
Resolutions: 1km (2 MB), 500m (1.6 MB), 250m ( B)
Bands Used: 1,4,3
Image Credit: MODIS Land Rapid Response Team, NASA GSFC



https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2021-09-12

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