Guam, 1997

Hurricane and Heavy Rain in Guam, April 11 to 19, 1997

April 11 to 19, 1997 · NWS GUA · 3 events in 2 counties and zones

Typhoon Isa (02W) was within the Guam Area of Responsibility from the 9th until the 21st. It was first reported as a tropical disturbance on the 9th.

The toll

Deaths
19
Injuries
8
Property damage
$2.4 million
Crop damage
$600,000
Events
3

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS GUA wrote it up.

Typhoon Isa (02W) was within the Guam Area of Responsibility from the 9th until the 21st. It was first reported as a tropical disturbance on the 9th. It became a tropical storm on the 12th. On the 12th it was near Pohnpei. Peak wind gust observed across the island were 60 mph. There were no report of death or injury. A few buildings had damage to roofs. An estimated 15 percent of the crops were damaged. This included damage to banana and breadfruit trees. Fallen trees and large branches destroyed an estimated 40 percent of the power lines. Typhoon Isa passed about 160 miles south of Guam on the 17th. There were heavy rains across Guam on this day with 6.36 inches falling at the NWSO at Tiyan and 6.68 inches at Anderson Air Force Base. On the 17th the winds gusted to 45 mph at the Tiyan NWSO. This was not the strongest recorded, however. The next day a spiral band from the storm passed across Guam causing a gust to 53 mph at the NWSO. Sporadic power outages occurred across Guam. There were light damage to buildings, primarily over the southern sections of the island. Wind and salt damage to tomato, okra, cucumber and long bean crops were reported. This damage was estimated to be around $100,000. Rains were falling for a few days across Pohnpei. On the 20th very heavy rains fell. 10.53 inches were reported at the WSO on Pohnpei. As a result of the saturated ground 20 landslides occurred on this day. The Sokes municipality was were the landslides occurred. Effected were the communities of Oaumor, Iohl, and Aumoar. These landslides resulted in 8 injuries and 19 fatalities.Tropical Storm Jimmy (03W) moved through the Guam Area of Responsibility from the 18th to the 26th. It's path took it far away from any islands, and as a result no damage was reported.

Event by event

2 hurricane (typhoon), 1 heavy rain. Local standard time, as filed.

Hurricane (Typhoon), Micronesia

When
April 11, 8:00 AM PST to April 12, 4:35 PM PST
Where
Micronesia forecast zone
Property damage
$200,000
Crop damage
$500,000
Reported by
OFFICIAL NWS OBS.

15 percent of the islands crops were damage. This included banana and breadfruit trees.

Hurricane (Typhoon), Guam

When
April 16, 12:00 AM PST to 11:00 PM PST
Where
Guam forecast zone, Andersen Afb
Property damage
$200,000
Crop damage
$100,000
Reported by
OFFICIAL NWS OBS.

Wind and salt damage to tomato, okra, cucumber and long bean crops.

Heavy Rain, Micronesia

When
April 19, 12:00 AM PST to 11:00 PM PST
Where
Micronesia County, Pohnpei
Deaths
19 direct, 0 indirect
Injuries
8 direct, 0 indirect
Property damage
$2.0 million
Reported by
OFFICIAL NWS OBS.

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

EventDateAgeSexWhereKind
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect
Heavy Rain, Micronesia1997-04-19OtherDirect

What these are

Hurricane (Typhoon)
A tropical cyclone with sustained winds of 64 knots (74 mph) or more, filed per forecast zone for its wind, and with separate events for its flooding, surge and tornadoes.
Heavy Rain
Rainfall totals unusual for the place and season that did not produce a flood.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Guam in 1997Every state in 1997This day in weather historyWarnings in Guam, April 1997The 1997 hurricane season

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5624208, 5624209, 5624210.