Typhoon Holly (1984)

Typhoon Holly (Isang)

Typhoon Holly on August 20
Meteorological history
Formed	August 15, 1984 (1984-08-15)
Extratropical	August 22, 1984 (1984-08-22)
Dissipated	August 24, 1984 (1984-08-24)
Typhoon
10-minute sustained (JMA)
Highest winds	140 km/h (85 mph)
Lowest pressure	960 hPa (mbar); 28.35 inHg
Category 1-equivalent typhoon
1-minute sustained (SSHWS/JTWC)
Highest winds	130 km/h (80 mph)
Overall effects
Fatalities	19
Damage	$1 million (1984 USD)
Areas affected	South Korea Japan Soviet Union
IBTrACS
Part of the 1984 Pacific typhoon season

Typhoon Holly, known in the Philippines as Typhoon Isang,^[1] affected South Korea, Japan, and the Soviet Union during August 1984. Holly originated from the monsoon trough that extended eastward from its original position in mid-August 1984. Over a period of several days, the system slowly became better organized as it tracked westward, although the system did not initially develop a well-defined center. On August 15, a tropical depression was declared, and on the next day, the depression was upgraded into Tropical Storm Holly. Holly slowly gained strength, becoming a typhoon on August 17 as it passed near Okinawa. The typhoon turned northwest and then north as it rounded a subtropical ridge. At noon on August 19, Holly attained its peak intensity of 130 km/h (80 mph). Shortly after its peak, Holly accelerated northeast due to the westerlies in the general direction of the Korean Peninsula. Land interaction with South Korea triggered a weakening trend, and after entering the Sea of Japan, Holly began to transition into an extratropical cyclone. Thunderstorm activity quickly decreased near the center, and by August 21, Holly had completed its extratropical transition.

In advance of the typhoon, ferry service between Jeju and mainland South Korea was called off, prompting 800 fishing boats to seek shelter. Throughout South Korea, nine people were killed or missing and hundreds lost their homes. At least 10 fishing boats were destroyed and hundreds of hectares of farmland were inundated. Across the Ryukyu Islands, 15,000 air travelers were stranded, including 14,000 from Okinawa when 23 flights were canceled. Between the Ryukyu Islands and the rest of Japan, ferry service was discontinued for two days, which resulted in 21,000 stranded passengers. Overall, one person was killed due to high waves in Nagasaki Prefecture, nine were listed as missing, and eleven were wounded. In all, damage was estimated at US$1 million. The extratropical remnants caused significant flooding in the Russian Far East. Water levels around Khabarovsk rose 10 m (33 ft) along the Amur River, resulting in the evacuation of 64 families, although 2,000 cows and pigs remain stranded. Elsewhere, in Arkhara, a dam along the Amur River burst, which caused the worst flooding in the region since 1928 and resulted in the evacuation of many isolated children by helicopter.