[5] Alice began to slow down near Guam,[7] strengthening to 75 kn (85 mph; 140 km/h) at 00:00 UTC one day later,[5] equivalent to a Category 1 typhoon on the Saffir–Simpson scale.

[6] The highest maximum sustained winds, 100 kn (115 mph; 185 km/h), equivalent to a Category 3 typhoon on the Saffir–Simpson scale, were recorded at 18:00 UTC on October 19 near Iwo Jima by the 56th Weather Reconnaissance Squadron.

[6] According to an analysis of the historic western north Pacific tropical cyclone record in the Monthly Weather Review, it was likely that stronger winds existed near the eye, but were not observed.

[5] At 18:00 UTC, the system had weakened below typhoon strength to a tropical storm with sustained winds of 60 kn (70 mph; 110 km/h), as it turned east and accelerated away from Japan.

The 24-hour rainfall total at Andersen Air Base, 18.33 in (466 mm), was the record high in Guam until Typhoon Pamela of 1976 struck the island.

[7] The resulting floods washed away four bridges across the island, cutting off access to the villages of Talofofo, Inarajan, Merizo, and Umatac.

[10] Multiple roads, including Highways 4 and 8, were rendered impassable, and Marine Drive had debris floating and stalled cars alongside it.

Water leaked into the Guam Memorial Hospital, prompting doctors and nurses to move patients and supplies to dryer areas.

[10] Much of Andersen Air Force Base was flooded,[11] and two airmen were electrocuted when they were leaning against a metal doorknob at The Airman's Club.

[7] Ford Quint Elvidge, the Governor of Guam, toured the island and inspected the damage, praising the government agencies for their efforts.

[11] As Alice passed 100 mi (160 km) east of Iwo Jima on October 19, light rainfall of 1.5 in (38 mm) and winds of 70 mph (110 km/h) were reported on the island.