From November 25 to 27, the system tracked westward at a steady pace and rate of intensification, first making minor impacts in Guam.

From November 29 to December 1, Kammuri was unable to strengthen to previous estimates due to its near stationary movement as a result of weak steering currents, upwelling itself consequently.

As the weak typhoon continued west, upwelling of itself due to its quasi-stationary movement combined with moderate wind shear hindered significant intensification of Kammuri over the next three days.

[2][3] Through midnight and early morning of December 3, Kammuri crossed the Bicol Region and weakened due to land interaction.

[14] On November 28, PAGASA stated in a press conference that appropriate measures and linkaging with the 2019 SEA Games organizers have been in place in preparation for the typhoon, such as storm chasers and mobile radars dispatched to competition venues in Metro Manila and Central Luzon.

[27] In the 12th severe weather bulletin issued by PAGASA on December 2, 2019, reported that prior to its first landfall, the southern eyewall of Typhoon Kammuri brought violent winds and intense rainfall over the neighboring province of Northern Samar.

[29] Photos and video footage from the towns of Mapanas and Gamay, both located on Northern Samar's Pacific side, show severe flooding and high winds from the typhoon.

[32] In Northern Samar, winds were reported to reach as up to 135 km/h (85 mph) with a total accumulated rainfall of 605.5 mm (23.84 in) within the course of 24 hours on December 2.

[37] On December 4, Northern Samar's Province Disaster Risk Reduction and Management Council (PDRRMC) recommended a state of calamity, and shortly after, it was raised in two towns: Catarman and Gamay.

[33][38] Massive destruction along with widespread flooding, damaged houses, landslides and even weak communication signal prompted their local government to issue the state of calamity in the two towns.

[38] 224,171 individuals were affected by Kammuri (Tisoy) in Northern Samar, and based on post-disaster assessment, about 28,577 houses were damages while an additional 3,774 were washed out by extreme flooding.

[33] Moreover, Kammuri's rain bands extended to as far north as Cagayan Valley, where, with the inclusion of the northeastern monsoon, saw one of the worst flooding in decades for the northern region.

[41] The 2019 Southeast Asian Games, held in the Philippines that year, had several matches and events either cancelled or rescheduled due to Kammuri.

[42] Ramon Agregado, the organizing committee's head of the Subic cluster of venues, stated, "The windsurfing has been cancelled until we have a more accurate picture of the weather.

[42] Occidental Mindoro also withdrew as hosts of the 2020 Palarong Pambansa, the national students sports competition of the Philippines, due to damage caused by Kammuri in the province.