High Wind in Guam, October 20, 2004

Name: High Wind in Guam, October 20, 2004
Start: 2004-10-20T23:51
End: 2004-10-20T23:51
Location: Guam

October 20, 2004 · NWS GUA · 1 event in 1 county or zone

A wind gust of 51 kt (59 mph) was reported by the automated station at the University of Guam in Mangilao. The gust was associated with the passage of Typhoon Nock-Ten well southwest of the island.

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
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.

A wind gust of 51 kt (59 mph) was reported by the automated station at the University of Guam in Mangilao. The gust was associated with the passage of Typhoon Nock-Ten well southwest of the island.

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 20, 3:47 PM SST, 8 hours 4 minutes earlier.

Area forecast discussion, Oct 20, 3:47 PM SST, 8 hours 4 minutes before

AREA SYNOPTIC DISCUSSION
NATIONAL WEATHER SERVICE TIYAN GU
100 PM GUAM LST THU OCT 21 2004

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

TYPHOON NOCK-TEN IS CENTERED NEAR 14N140E...OR ABOUT 300 MILES
WEST OF GUAM...MOVING NORTHWEST AT 16 MPH WITH MAXIMUM SUSTAINED
WINDS OF 110 MPH. HEAVY RAIN AND SCATTERED THUNDERSTORMS EXTEND
OUTWARD UP TO 50 MILES FROM THE CENTER. SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS EXTEND FARTHER OUT BETWEEN 11N AND 14N
FROM 137E TO 141E. SEE JTWC BULLETIN WTPN32 PGTW FOR MORE DETAILS.

A MONSOON TROUGH EXTENDS FROM NEAR 10N130E NORTHEAST THROUGH TYPHOON
NOCK-TEN...THEN EASTWARD THROUGH A WEAK CIRCULATION NEAR 12N170E TO
12N AND THE DATELINE. LOW-LEVEL CONVERGENCE ALONG AND NORTH OF THE
TROUGH IS PRODUCING SCATTERED SHOWERS AND A FEW THUNDERSTORMS NORTH
OF POHNPEI AND KWAJALEIN BETWEEN 8N AND 14N FROM 157E TO 167E...AND
SOUTHEAST OF WAKE BETWEEN 14N AND 18N FROM 170E TO 180.

SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ARE OCCURRING ALONG
A SHEAR LINE NORTH OF WAKE...ABOUT 40 MILES EITHER SIDE OF A LINE
FROM 22N165 TO 23N174 TO 25N180.

Event by event

1 high wind. Local standard time, as filed.

High Wind, Guam

When: October 20, 11:51 PM SST
Where: Guam forecast zone
Measured: 51 kt (59 mph) measured gust
Reported by: AWOS,ASOS,MESONET,ETC

What these are

High Wind: Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.

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

The same day elsewhere

Every storm in Guam in 2004 Every state in 2004 This day in weather history Warnings in Guam, October 2004

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: 5432270.