Lightning Strike in Guam, August 4, 2005

Name: Lightning Strike in Guam, August 4, 2005
Start: 2005-08-04T20:00
End: 2005-08-04T20:00
Location: Guam

August 4, 2005 · NWS GUA · 1 event in 1 county or zone

Lightning struck a water booster pump station, causing a water outage in the Mount Santa Rosa area of Yigo in northern Guam. Water service was restored the afternoon of the 5th.

The toll

Deaths: 0
Injuries: 0
Property damage: $5,000
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.

Lightning struck a water booster pump station, causing a water outage in the Mount Santa Rosa area of Yigo in northern Guam. Water service was restored the afternoon of the 5th.

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 Aug 4, 4:51 PM SST, 3 hours 9 minutes earlier.

Area forecast discussion, Aug 4, 4:51 PM SST, 3 hours 9 minutes before

AREA SYNOPTIC DISCUSSION
NATIONAL WEATHER SERVICE TIYAN GU
150 PM GUAM LST FRI AUG 5 2005

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

THE MONSOON TROUGH ENTERS THE AREA AT 23N130E AND EXTENDS EASTWARD
THROUGH A LOW PRESSURE AREA CENTERED NEAR 25N140E...THEN SOUTHWARD
THROUGH ANOTHER LOW PRESSURE AREA CENTERED NEAR 7N147E AND ENDS AT
4N155E. CONVERGING LOW-LEVEL WINDS INTO THE TROUGH AND CIRCULATION
CENTERS ARE PRODUCING SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS
IN SEVERAL AREAS. THE FIRST AREA IS BOUNDED BY A LINE FROM 23N131E
TO 23N134E TO 13N137E TO 13N132E BACK TO 23N131E. THE SECOND AREA IS
BOUNDED BY A LINE FROM 25N150E TO 20N151E TO 12N148E TO 12N1443 TO
21N145E BACK TO 25N150E. THIS INCLUDES ALL THE MARIANA ISLANDS.
A THIRD AREA IS OCCURRING PRIMARILY SOUTH OF THE TROUGH BOUNDED BY A
LINE FROM 8N144E TO EQ158E TO EQ150E TO 5N143E BACK TO 8N144E.

CONVERGING LOW-LEVEL WINDS ARE GENERATING SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS BETWEEN 4N AND 11N FROM 130E TO 142E. THIS
AREA INCLUDES MOST OF THE REPUBLIC OF PALAU AND THE WESTERN HALF OF
YAP STATE.

AN UPPER-LEVEL TROUGH EXTENDS FROM NEAR 18N167E TO 24173E. A SMALL
AREA OF SCATTERED SHOWERS AND A FEW THUNDERSTORMS IS OCCURRING NEAR
WAKE ISLAND BETWEEN 19N AND 22N FROM 166E TO 170E.

TRADE-WIND CONVERGENCE IS PRODUCING SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS BETWEEN 4N AND 10N FROM 167E TO EAST OF 180.

Event by event

1 lightning. Local standard time, as filed.

Lightning, Guam

When: August 4, 8:00 PM SST
Where: Guam County, Yigo
Property damage: $5,000
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 2005 Every state in 2005 This day in weather history Warnings in Guam, August 2005

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: 5474197.