Guam, 2014

Hurricane in Guam, December 1 to 3, 2014

December 1 to 3, 2014 · NWS GUM · 1 event in 1 county or zone

Typhoon Hagupit moves across Yap state during the first week of December 2014.

The toll

Deaths
0
Injuries
0
Property damage
$100,000
Crop damage
$100,000
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 GUM wrote it up.

Typhoon Hagupit moves across Yap state during the first week of December 2014.

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 Guam wrote its last area forecast discussion before the first event at Nov 30, 9:17 AM UTC, 4 hours 43 minutes earlier.

Area forecast discussion, Nov 30, 9:17 AM UTC, 4 hours 43 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TIYAN GU
717 PM CHST SUN NOV 30 2014

.MARIANAS SYNOPSIS...
RADAR SHOWS ONLY ISOLATED LIGHT SHOWERS. SATELLITE SHOWS CLOUDS
ASSOCIATED WITH A WEAK SHEAR LINE REMAIN JUST NORTH OF SAIPAN
COASTAL WATERS...OTHERWISE SKIES ARE FAIR ACROSS THE LOCAL REGION.
THE DISTURBANCE SSW OF POHNPEI CENTERED NEAR 2N157E HAS BECOME
SLIGHTLY BETTER ORGANIZED TODAY. BUOYS INDICATE COMBINED SEAS OF 6
TO 8 FEET ALONG WITH A LONG-PERIOD NORTH COMPONENT.

&&

.DISCUSSION...
THE BROAD CIRCULATION/DISTURBANCE CENTERED NEAR 2N157E WILL NEED TO
BE WATCHED CLOSELY IN THE COMING DAYS. MODELS STILL DIFFER QUITE A
BIT. GFS IS MOST AGGRESSIVE IN DEVELOPING THE DISTURBANCE AND MOVING
IT IN A NORTHWESTERLY DIRECTION. OTHER MODELS SEEM MORE REALISTIC BY
DEVELOPING IT MORE GRADUALLY TOWARD WEST-NORTHWEST...AND SO ECMWF IS
THE MODEL OF CHOICE AT THIS TIME.

&&

.MARINE...
THE RITIDIAN BUOY REPORT OF LONG-PERIOD NORTH SWELL REQUIRES A SURF
ADVISORY TO BE ISSUED FOR THE NEXT DAY OR TWO. THE DISTURBANCE NEAR
2N157E...CENTERED SSW OF POHNPEI...NEEDS TO BE MONITORED AS AS IT
WILL LIKELY DRIFT TOWARD WEST-NORTHWEST IN THE COMING DAYS...AND
HAZARDOUS SEA CONDITIONS COULD DEVELOP ACROSS THE MARIANAS BY
WEDNESDAY OR THURSDAY. ADJUSTMENTS WERE MADE TO INITIAL CONDITIONS
FOR THE WAVE GRIDS...BUT WW3 WAVE MODEL IS EXTREME AND BASED ON A
VERY AGGRESSIVE GFS WIND AND WAVE SOLUTION THAT IS NOT REASONABLE
TO PUT IN THE FORECAST AT THIS TIME. ECMWF MODEL WINDS REMAIN IN THE
WIND GRIDS.

&&

.EASTERN MICRONESIA...
LATEST ASCAT STREAMLINE ANALYSIS REVEALS TWO TROPICAL
DISTURBANCES...ONE SOUTH OF CHUUK LAGOON AT 4N151E AND ANOTHER ONE
SOUTH OF POHNPEI NEAR 2N157E. BASED ON VISIBLE SATELLITE LOOP...THE
SECOND DISTURBANCE IS MUCH BETTER ORGANIZED WITH A MID-LEVEL
VORTICITY FIELD IN ITS VICINITY. AS LONG AS THE SUB-TROPICAL RIDGE
REMAINS STRONG NEAR 25N...NOT MUCH MOVEMENT IS EXPECTED FOR THESE
DISTURBANCES. THEREFORE CONVERGING MODERATE TO FRESH TRADE WINDS
NORTH OF THESE DISTURBANCES WILL CONTINUE TO TRIGGER SHOWERY WEATHER
FOR CHUUK LAGOON AND POHNPEI THRU MONDAY EVENING. BEING SOUTH OF THE
CONVERGENCE ZONE...CONDITIONS NEAR KOSRAE WILL BE DRIER THRU MONDAY
AFTERNOON. FARTHER EAST...AN EVEN MORE ROBUST TRADE CONVERGENCE ZONE
IS SEEN BETWEEN 3N AND 8N. IT IS STRETCHING EASTWARD FROM NEAR THE
MARSHALL ISLANDS ACROSS THE DATE LINE TO BEYOND 160W. THIS FEATURE
IS GOING TO MAINTAIN INCLEMENT WEATHER NEAR MAJURO FOR THE NEXT FEW
DAYS...AND SPREAD TO KOSRAE BY LATE MONDAY NIGHT.

A SERIES OF FRONTAL SYSTEMS NEAR KOREA AND OVER CHINA WILL SLIDE
EASTWARD THRU MONDAY NIGHT AND WEAKEN THE SUB-TROPICAL RIDGE NEAR
25N. THIS SHOULD ALLOW THE TROPICAL DISTURBANCES TO START TRACKING
WEST-NORTHWESTWARD ON TUESDAY. IN RESPONSE...IT WILL DRAG THE TRADE
CONVERGENCE ZONE NORTH OF CHUUK LAGOON AND POHNPEI WHICH WILL
DECREASE SHOWER COVERAGE. HOWEVER IF THE DISTURBANCES DEVELOP
FURTHER BETWEEN MONDAY AND TUESDAY...SHOWERS AND GUSTY WINDS COULD
LAST LONGER. AROUND MIDWEEK...THE LEADING ELEMENT OF THE SECOND
TRADE CONVERGENCE ZONE CURRENTLY OVER THE MARSHALLS WILL ARRIVE AND
BRING MORE UNSETTLED WEATHER FOR BOTH LOCALES.

LONG-PERIOD NORTH SWELLS GENERATED BY NEAR GALE WINDS ASSOCIATED
WITH A PRONOUNCED LOW PRESSURE SYSTEM SOUTH OF THE ALEUTIANS WILL
ARRIVE AT MICRONESIA FROM CHUUK STATE EASTWARD TO THE MARSHALL
ISLANDS ON MONDAY. THIS WILL LIKELY CAUSE HAZARDOUS SURF FROM CHUUK
STATE EASTWARD TO KOSRAE BY MONDAY AFTERNOON. SURF ACROSS THE
MARSHALLS WILL STAY BELOW HAZARDOUS LEVELS BUT HIGHER RIP CURRENT
RISKS ARE ANTICIPATED. IN CONJUNCTION WITH THE LOW SPRING TIDE
CYCLE...COASTAL INUNDATION WILL NOT BE A CONCERN FOR MAJURO AND
NEARBY ATOLLS.

&&

.WESTERN MICRONESIA...
THE NEAR-EQUATORIAL TROUGH IS GOING TO STAY SOUTH OF KOROR AND YAP
FOR THE NEXT FEW DAYS. MUCH DRIER TRADES TO THE NORTH WILL MINIMIZE
THE CHANCE OF SHOWERS NEAR YAP THRU MONDAY NIGHT. FOR KOROR...TWO
WEAK IMPULSES EMBEDDED WITHIN THE TRADES COULD SPARK OFF A FEW
SHOWERS UNTIL MONDAY AFTERNOON. WEATHER FOR BOTH LOCATIONS AFTERWARD
WILL DEPEND GREATLY ON THE FUTURE PATH AND STATUS OF TWO TROPICAL
DISTURBANCES CURRENTLY SOUTH OF CHUUK LAGOON AND POHNPEI. IF THE
BETTER ORGANIZED DISTURBANCE SOUTH OF POHNPEI BEGINS TO DEVELOP...IT
COULD MERGE WITH THE ONE SOUTH OF CHUUK LAGOON. THIS COMBINED SYSTEM
MIGHT DEVELOP FURTHER AS IT PASSES NEAR KOROR AND YAP NEAR MIDWEEK.
FOR NOW...HAVE INTRODUCED THUNDERSTORMS AND HIGHER SEAS INTO THE
LONGER TERM FORECAST.

A COLD FRONT COMING OFF THE EAST CHINA COAST IS EXPECTED TO PASS
SOUTH OF JAPAN OVER THE NEXT FEW DAYS. FRESH TO STRONG WINDS NORTH
OF THIS FRONT WILL PRODUCE LONG-PERIOD NORTH-NORTHEAST SWELLS TOWARD
THE REPUBLIC OF PALAU AND YAP STATE. THESE SWELLS MIGHT GENERATE A
BORDERLINE HIGH SURF ADVISORY BY TUESDAY.

&&

.GUM WATCHES/WARNINGS/ADVISORIES...
GU...HIGH SURF ADVISORY UNTIL 6 PM CHST TUESDAY FOR GUZ001>004.

MARIANAS WATERS...NONE.
&&

SIMPSON/CHAN

Event by event

1 hurricane (typhoon). Local standard time, as filed.

Hurricane (Typhoon), Micronesia

When
December 1, 12:00 AM GST to December 3, 12:00 AM GST
Where
Micronesia forecast zone
Category
1
Property damage
$100,000
Crop damage
$100,000
Reported by
Official NWS Observations

On the morning of the 30th of November a tropical disturbance was located southwest of Kosrae near 1N161E. By the 1st of December it had moved west and was located around 400 miles southeast of Chuuk.

By the afternoon of the 1st the circulation became Tropical Depresison 22W. By the night of the same day the depression strengthened to Tropical Storm Hagupit when it was located 160 miles south-southwest of Weno Chuuk. On the morning of the 2nd, Hagupit passed 75 miles south of Puluwat. No reports were received from Puluwat, but ASCAT data showed winds between 30 to 35 mph should have been felt at that|location.

ASCAT data showed that Satawal was the first to experience Storm Force winds |followed by Faraulep then Woleai, then Fais and finally Ulithi, Yap and Ngulu. |At 11 a.m. Tuesday, December 2, 2014, Tropical Storm Hagupit passed 105 miles |South of Satawal moving toward Faraulep and Woleai with maximum sustained winds|of 65 miles mph.

It is not certain of the extent of damage that Satawal sustained, but it should |have been minimal considering the size of the island and how far from the island |that the storm passed.

By approximately 10 pm on Tuesday, December 2nd, 2014, Hagupit was estimated to |have passed less than 90 miles South of Woleai. The observer on Woleai reported|that as Tropical Storm passed them that he estimated that the winds gusted to as high as 23 mph.

On the morning of the 3rd, Hagupit continued to intensify and became a typhoon. |That night the typhoon passed about 30 miles to the northeast of the small atoll of Ngulu in Yap State. There were no injuries or casualties on Ngulu according chief Mario Mangar of Ngulu.

Northern clockwise through the Southern shore of the main island of Yap was heavily affected mainly due to thunderous storm surge pounding that shoreline. Private dwellings along the shore were washed away and even some concrete buildings close the shores suffered damage because of the heavy storm surge. In some areas the strong storm surge found its way inland as far as 200 yards. Most of the roads and |causeways in town were under 2 to 4 feet of salt water. There were reports from the southern part of the island of Yap that indicated that sea water moved the farthest inland reaching areas that has not been reached by sea water for many years, not even during the devastating Typhoon Sudal in 2003.

Fortunately, no injuries or casualties were reported. Government facilities including the hospital, dispensaries, schools and community centers were opened to the public to use as typhoon shelters. There was no damage to Weather Service Office and to other government facilities.

There were some fallen trees, but mostly old trees, trees in poor soil conditions, |and those by the shore that the water assisted in uprooting. Many power lines were damaged by fallen trees and this resulted in power outages for some places. Several days after the typhoon had long passed, repairs were completed and power restored.

Damage to property away from the shoreline were limited to poorly constructed houses or from falling trees. The only building that was known to have collapsed was one that was termite infested. The termite infestation was probably the biggest contributor since other buildings nearby did not undergo the same problem.

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

More

Every storm in Guam in 2014Every state in 2014This day in weather historyWarnings in Guam, December 2014The 2014 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: 560233.