Guam, 2001

Flood in Guam, October 14, 2001

October 14, 2001 · NWS GUA · 1 event in 1 county or zone

An Inverted Trough and an upper level low was also moved across the region. The upper level low enhanced precipitation across Guam resulting in heavy showers during the day.

The toll

Deaths
0
Injuries
0
Property damage
$400,000
Crop damage
None recorded
Events
1

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.

An Inverted Trough and an upper level low was also moved across the region. The upper level low enhanced precipitation across Guam resulting in heavy showers during the day. At the National Weather Service Office in Tiyan the rain started at 1013 and ended by 2336. Between 1000 and 1600 4.81 inches of rain fell at the NWSFO with an additional 0.56 inches falling from 1600 to midnight. The heavy rain caused flooding in parts of the island. In Tumon cars had to drive through nearly a foot of water at the intersection of Pale San Vitores Road near the Hilton Guam Resort. In the area of West Brook, Ungkulu, Lizama and San Antonio streets in Barrigada poor drainage in one area resulted in flood waters reaching to 6 foot depths. 59 people from twelve Barrigada families were evacuated and taken to the mayor's office. Guam Fire Department rescue units had to use personal watercraft to rescue the Pelonio family from the flood waters. Another 49 people were affected by the flooding but were not seeking government assistance. The Government of Guam declared a state of emergency and made $250,000 available to the flood affected area. This money will be used for temporary housing for the victims, repair of storm drains and from clean up of the flooded area. After a thorough assessment it is believed that the total damage coast will be near $420,796.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS GUA wrote its last area forecast discussion before the first event at Oct 14, 3:45 AM SST, 6 hours 15 minutes earlier.

Area forecast discussion, Oct 14, 3:45 AM SST, 6 hours 15 minutes before
AREA SYNOPTIC DISCUSSION
NATIONAL WEATHER SERVICE TIYAN GU
1 AM GUAM LST MON OCT 15 2001

WESTERN NORTH PACIFIC BETWEEN EQUATOR AND 25N FROM 130E TO 180.

TYPHOON HAIYAN (25W) IS CENTERED NEAR 21N130E. MAXIMUM SUSTAINED
WINDS ARE 75 MPH WITH GUSTS TO 90 MPH. THE STORM IS MOVING NORTH AT
8 MPH. SHOWERS AND ISOLATED THUNDERSTORMS ASSOCIATED WITH THE
TYPHOON ARE LOCATED BETWEEN 18N AND 24N AND FROM 126E TO 133E.

AN UPPER-LEVEL TROUGH WEST OF THE MARIANAS EXTENDS ALONG 139E FROM
25N TO 11N. FAVORABLE UPPER-LEVEL WINDS EAST OF THE TROUGH ARE
HELPING TO PRODUCE SHOWERS AND A FEW THUNDERSTORMS BETWEEN 11N AND
20N FROM 141E TO 148E...INCLUDING THE MARIANA ISLANDS.

THE MONSOON TROUGH EXTENDS FROM TYPHOON HAIYAN SOUTHEAST TO A WEAK
CIRCULATION NEAR 9N145E...THEN EAST TO ANOTHER WEAK CIRCULATION NEAR
5N165E. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS NEAR AND SOUTH
OF THE TROUGH ARE LOCATED BETWEEN THE EQUATOR AND 8N FROM 147E TO
165E...INCLUDING CHUUK...POHNPEI AND KOSRAE.

SURFACE WIND FLOW CONVERGENCE IS PRODUCING SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS BETWEEN 2N AND 10N FROM 167E TO 180...
INCLUDING KWAJALEIN AND MAJURO.

Event by event

1 flood. Local standard time, as filed.

Flood, Guam

When
October 14, 10:00 AM SST to 11:40 PM SST
Where
Guam forecast zone
Property damage
$400,000
Reported by
NEWSPAPER

What these are

Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

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

The same day elsewhere

More

Every storm in Guam in 2001Every state in 2001This day in weather historyWarnings in Guam, October 2001

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: 5271234.