An advisory by the Joint Typhoon Warning Center (JTWC) assessed the system as having a "poor" chance to develop due to strong wind shear in the region.

[5] The JMA upgraded it to a tropical storm on October 9; both agencies recognized it as a typhoon the next day after an eye became visible and outflow improved in the northwestern quadrant.

[2][3] Dan made landfall on the southeastern coast of Luzon in the Philippines, and its center tracked just south of Ninoy Aquino International Airport.

[2] Dan crossed over the island and emerged into the South China Sea, having lost its eye feature and weakened back into a tropical storm.

The JTWC reports that Dan reattained typhoon status at 0000 UTC on October 12,[2] although according to the JMA it did so 24 hours earlier.

[3] The typhoon continued to intensify, and the JTWC estimates that it reached its peak intensity at 0600 UTC, with 1-minute maximum sustained winds of 130 km/h (80 mph).

[2] The JMA indicates that Dan peaked slightly afterward, with 10-minute sustained winds of 140 km/h (85 mph) and a minimum barometric pressure reading of 960 millibars.

[6] The storm triggered flooding and landslides, while high winds, estimated up to 160 km/h (99 mph) brought down trees and powerlines.

[6] The Department of Social Welfare and Development also provided $371,000 worth of emergency relief assistance to 2,700 families displaced by the storm.

[11] Despite the scale of damage from Dan and other typhoons in the region, no request for international assistance was made by the Philippine Government.

[6] As the storm progressed westward, it buffeted Hainan Island with gale-force winds and exacerbated damage caused by Typhoons Angela and Brian.