Lightning Strike in Guam, September 9 to 10, 2003

Name: Lightning Strike in Guam, September 9 to 10, 2003
Start: 2003-09-09T17:30
End: 2003-09-10T02:00
Location: Guam

September 9 to 10, 2003 · NWS GUA · 1 event in 1 county or zone

Several lightning strikes around the island of Guam disrupted power. A lightning strike around 2200 took power away from people in the Agana Heights and Sinajana areas.

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.

Several lightning strikes around the island of Guam disrupted power. A lightning strike around 2200 took power away from people in the Agana Heights and Sinajana areas. Thunderstorms were reported from the National Weather Service Office from 1735 to 1953

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 Sep 9, 3:36 PM SST, 1 hour 54 minutes earlier.

Area forecast discussion, Sep 9, 3:36 PM SST, 1 hour 54 minutes before

AREA SYNOPTIC DISCUSSION
NATIONAL WEATHER SERVICE TIYAN GU
1 PM GUAM LST WED SEP 10 2003

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

A MONSOON TROUGH EXTENDS FROM 24N130E SOUTHEAST THROUGH 12N140E TO A
WEAK CIRCULATION NEAR 8N147E...THEN NORTHEAST TO 13N158E. SCATTERED
SHOWERS AND THUNDERSTORMS ASSOCIATED WITH THESE FEATURES ARE FOUND
NORTH OF PALAU BETWEEN 7N AND 14N FROM 133E TO 136E AND SOUTH OF THE
MARIANAS IN THE AREA BOUNDED BY 13N142E TO 7N147E TO 4N147E TO
4N145E TO 8N141E AND BACK TO 13N142E...AND WEST OF POHNPEI WITHIN
100 MILES OF A LINE FROM 4N155E TO 8N157E.

LOW-LEVEL CONVERGENCE IS GENERATING SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS WITHIN 100 MILES OF A LINE FROM 3N164E TO 7N171E
OR ROUGHLY BETWEEN KOSRAE AND MAJURO.

AN UPPER-LEVEL LOW CENTERED NEAR 22N142E AND IS PRODUCING ISOLATED
THUNDERSTORMS WELL NORTH OF THE MARIANA ISLANDS...BETWEEN 23N AND
28N FROM 143E TO 151E.

ANOTHER UPPER LEVEL LOW NEAR 22N163E IS ENHANCING SHOWERS BETWEEN
18N AND 23N FROM 165E TO 169E.

Event by event

1 lightning. Local standard time, as filed.

Lightning, Guam

When: September 9, 5:30 PM SST to September 10, 2:00 AM SST
Where: Guam County, Countywide
Reported by: NEWSPAPER

What these are

Lightning: A lightning strike that killed, injured or caused damage.

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

The same day elsewhere

Every storm in Guam in 2003 Every state in 2003 This day in weather history Warnings in Guam, September 2003

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: 5338994.