Hurricane (Typhoon), Northern Marianas
- When
- August 3, 8:00 PM SST to August 4, 8:00 PM SST
- Where
- Northern Marianas forecast zone
- Property damage
- $50,000
- Reported by
- EMERGENCY MANAGER
Hurricane in Guam, August 3 to 4, 2001
5E. The circulation had formed on the monsoon trough.
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $50,000
- 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.
The circulation that would become Typhoon Man-Yi (12W) was fist seen on the 1st of the month 270 mile northwest of Pohnpei near 9.5N 155.5E. The circulation had formed on the monsoon trough. The system moved slowly northwest and gained strength. It became Tropical Depression 12W on the morning of the 2nd. The tropical cyclone continued to strengthen during the day and reached tropical storm intensity by evening of the 2nd. The storm passed 280 miles to the east of Guam on the morning of the third. Man-Yi became a typhoon on the evening of the 3rd when it was 140 mile northeast of Saipan. The typhoon continued to track northwest and eventually passed over the small northern Mariana island of Agrihan on the morning of the 4th. The island of Agrihan has a population of 25 (21 adults and 4 children).Damage on Agrihan from Man-Yi:Dispensary kitchen roof was blown off. Mr. Tobias Aldans' house was totally destroyedMany banana, tangerine and mango trees were damaged. String and buffalo beans and tapiocasprouts were destroyed.
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 3, 3:45 PM SST, 4 hours 15 minutes earlier.
Area forecast discussion, Aug 3, 3:45 PM SST, 4 hours 15 minutes before
AFDPQ AREA SYNOPTIC DISCUSSION NATIONAL WEATHER SERVICE TIYAN GU 1 PM GUAM LST SAT AUG 4 2001 WESTERN NORTH PACIFIC BETWEEN EQUATOR AND 25N FROM 130E TO 180. TYPHOON MAN-YI (12W) IS CENTERED NEAR 20.1N 144.9E..OR ABOUT 350 MILES NORTH OF SAIPAN AND ABOUT 100 MILES NORTHWEST OF AGRIHAN. TYPHOON MAN-YI HAS MAXIMUM SUSTAINED WINDS OF 110 MPH WITH GUSTS TO 130 MPH NEAR THE CENTER...AND IS MOVING TOWARDS THE NORTH-NORTHWEST AT 17 MPH. NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS ASSOCIATED WITH THE TYPHOON ARE LOCATED BETWEEN 18N AND 24N FROM 143E TO 149E. A RAIN BAND EXTENDS SOUTHWARD FROM THIS AREA..WITHIN 70 MILES OF A LINE FROM 18N147E TO 14N146E COVERING MUCH OF THE NORTHERN MARIANA ISLANDS. CONVERGENT LOW-LEVEL SOUTHWESTERLY FLOW IS PRODUCING SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS BETWEEN THE EQUATOR AND 4N FROM 130E TO 140E..WELL SOUTH OF YAP AND PALAU. AN AREA OF LOW-LEVEL WIND SPEED CONVERGENCE IS GENERATING SCATTERED SHOWERS AND THUNDERSTORMS NEAR CHUUK BETWEEN 2N AND 8N FROM 151E TO 153E. TRADE WIND CONVERGENCE BEHIND THE WIND SPEED CONVERGENCE NOTED ABOVE IS PRODUCING AN EXTENSIVE AREA OF SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ACROSS POHNPEI..KOSRAE..AND THE MARSHALL AND GILBERT ISLANDS. THIS AREA IS BETWEEN 2N AND 8N FROM 153E TO THE DATE LINE. FAVORABLE WIND FLOW AROUND AN UPPER LEVEL TROUGH SOUTH OF WAKE ISLAND IS GENERATING AN AREA OF SCATT|ERED SHOWERS BETWEEN 11N AND 13N FROM 162E TO 172E.
Event by event
1 hurricane (typhoon). Local standard time, as filed.
What these are
- Hurricane (Typhoon)
- A tropical cyclone with sustained winds of 64 knots (74 mph) or more, filed per forecast zone for its wind, and with separate events for its flooding, surge and tornadoes.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flood in Kentucky, August 3 to 4, 2001
- Heat in Texas, August 3, 2001
- Flash Flood in Kentucky, August 3 to 4, 2001
- Hail and Lightning Strikes in Massachusetts, August 3, 2001
- Flash Flooding and Damaging Wind in Iowa, August 3, 2001
- Lightning Strike in New Mexico, August 3, 2001
- Flash Flood and Damaging Winds in New York, August 3, 2001
- Flash Flood in New York, August 3, 2001
- Flash Flood in Colorado, August 3, 2001
- Damaging Wind in Massachusetts, August 3, 2001
- Dense Fog in Wisconsin, August 3, 2001
- Flash Flood in Kentucky, August 3, 2001
More
Every storm in Guam in 2001Every state in 2001This day in weather historyWarnings in Guam, August 2001The 2001 hurricane season
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: 5265902.