Funnel Cloud, Guam
- When
- September 18, 11:20 AM SST to 11:40 AM SST
- Where
- Guam County, Andersen Afb
- Reported by
- OTHER FEDERAL AGENCY
Funnel Cloud in Guam, September 18, 2002
On the 18th a Funnel cloud was observed north of the Andersen Air Force Base around 1120
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.
On the 18th a Funnel cloud was observed north of the Andersen Air Force Base around 1120
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 18, 3:44 AM SST, 7 hours 36 minutes earlier.
Area forecast discussion, Sep 18, 3:44 AM SST, 7 hours 36 minutes before
AREA SYNOPTIC DISCUSSION NATIONAL WEATHER SERVICE TIYAN GU 1 AM GUAM LST THU SEP 19 2002 WESTERN NORTH PACIFIC BETWEEN EQUATOR AND 25N FROM 130E TO 180. A MONSOON TROUGH EXTENDS EASTWARD ACROSS THE REGION FROM 14N130E TO A CIRCULATION IN THE NORTHERN MARIANAS NEAR 19N145E...CURRENTLY THE SUBJECT OF A TROPICAL CYCLONE FORMATION ALERT...AND SOUTHEASTWARD TO A WEAK CIRCULATION NEAR 13N165E. MONSOON WINDS SOUTH OF THE TROUGH AXIS ARE GENERATING SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS FROM PALAU AND YAP EASTWARD TO THE MARIANA ISLANDS BETWEEN 7N AND 15N FROM 130E TO 147E. CONVERGENT FLOW NORTH OF THE CIRCULATION IN THE NORTHERN MARIANAS IS PRODUCING NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS BETWEEN 19N AND 25N FROM 143E TO 149E. FURTHER EAST...CONVERGENT MONSOONAL FLOW SOUTH OF THE MONSOON TROUGH IS GENERATING SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS NEAR ENEWETAK ATOLL WITHIN 180 MILES OF 12N161E. THE COMBINATION OF A LOW-LEVEL TROUGH AND FAVORABLE UPPER-LEVEL WINDS IS PRODUCING SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS NORTH OF THE MARSHALL ISLANDS AND OVER WAKE ISLAND...OR BETWEEN 12N AND 23N FROM 168E TO 173E.
Event by event
1 funnel cloud. Local standard time, as filed.
What these are
- Funnel Cloud
- A rotating column of cloud extending from a thunderstorm that did not reach the ground.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flood and Hail in Iowa, September 18, 2002
- Hail and Damaging Winds in Iowa, September 18, 2002
- Tornadoes and Flash Flood in Oklahoma, September 18, 2002
- Hail and Damaging Winds in Texas, September 18, 2002
- Hail and Damaging Winds in Kansas, September 18, 2002
- Tornado and Flash Flood in Minnesota, September 18, 2002
- Hail and Damaging Winds in Ohio, September 18, 2002
- Flash Flood and Hail in North Dakota, September 18, 2002
- Hail and Damaging Winds in Texas, September 18, 2002
- Flash Flooding in North Carolina, September 18, 2002
- Hail and Damaging Wind in Indiana, September 18, 2002
- Hail and Damaging Wind in Kansas, September 18, 2002
More
Every storm in Guam in 2002Every state in 2002This day in weather historyWarnings in Guam, September 2002
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: 5325265.