Typhoon Koinu, traveling westward from the Pacific, was strengthening as it moved toward Taiwan, meteorologists on the island said Monday.

The storm was expanding in size and was expected to make landfall by Thursday morning, they said.

Koinu was moving northwest with sustained winds of 89 mph and gusts of up to 112 mph, according to Taiwan’s Central Weather Bureau. Forecasters predict the center of the storm will hit the island's southern cities, while bringing heavy rains to the east coast including the city of Taitung.

FIRE RAZES PORT CLYDE, MAINE WATERFRONT, DESTROYS MULTIPLE WYETH PAINTINGS

In the Philippines, which will avoid the typhoon's direct hit, the weather bureau issued storm warnings in at least six northern provinces and warned of possible flooding and landslides especially in mountainous regions. The typhoon will enhance seasonal monsoon rains elsewhere in the country in the next three days, forecasters said.

On Monday, Koinu was blowing 300 miles east of Basco town in the northernmost Philippine province of Batanes, in the Luzon Strait that separates the Philippines and Taiwan, according to Manila’s weather bureau.

Typhoon Haikui hit Taiwan in early September, the first typhoon to make landfall in years. It uprooted trees and damaged cars, and injured dozens, but did not cause any catastrophic damage.