Name: Tropical Storm in Guam, July 3 to 5, 2014
Start: 2014-07-03T00:00
End: 2014-07-05T00:00
Location: Guam

The toll

Deaths: 0
Injuries: 0
Property damage: $1.5 million
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 GUM wrote it up.

Tropical Storm Neoguri brought winds and high surf to the Mariana Islands.

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 Jul 2, 7:40 AM UTC, 6 hours 20 minutes earlier.

Area forecast discussion, Jul 2, 7:40 AM UTC, 6 hours 20 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE TIYAN GU
540 PM CHST WED JUL 2 2014

.MARIANAS SYNOPSIS...
RADAR SHOWS ISOLATED SHOWERS ACROSS THE COVERAGE AREA. A FEW HEAVIER
SHOWERS WERE OVER SOUTHERN GUAM AND NEAR SAIPAN EARLIER TODAY.
SATELLITE SHOWS SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS
CURRENTLY JUST EAST OF SAIPAN WHILE PATCHES OF ISOLATED TO WIDELY
SCATTERED SHOWERS WERE EAST AND SOUTHEAST OF GUAM. ASCAT ANALYSIS
INDICATES A POSSIBLE CIRCULATION NEAR 8.5N148E THAT IS ASSOCIATED
WITH INVEST AREA 90W.

&&

.DISCUSSION...
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ARE STILL EXPECTED
BY LATE TONIGHT AND THURSDAY...AND HAVE BEEN INTRODUCED FOR THE
FRIDAY NIGHT AND SATURDAY TIME FRAME. WINDS WERE ADJUSTED UPWARD
USING ECMWF MODEL WINDS...AND MORE CHANGES WILL LIKELY BE NEEDED
IN LATER FORECASTS. THE MONSOON TROUGH REMAINS SOUTH OF GUAM WHILE
THE DISTURBANCE CENTERED NEAR 8.5E148E CONTINUES TO SLOWLY DEVELOP
AND MOVE WEST-NORTHWEST. MODEL SOLUTIONS DIFFER SIGNIFICANTLY IN
REGARDS TO RAINFALL AND WIND PATTERNS...BUT ALL BASICALLY INDICATE
THE DISTURBANCE WILL MOVE ROUGHLY TOWARD THE NORTHWEST AND BECOME
BETTER ORGANIZED DURING THE NEXT FEW DAYS. RELATIVELY DRIER TRADE
WINDS ARE EXPECTED TO RETURN BY SUNDAY OR MONDAY.

&&

.MARINE...
WINDS AND WAVE GRIDS WERE ADJUSTED SIGNIFICANTLY. WIND GRIDS WERE
REFRESHED WITH ECMWF WINDS...WHICH SEEMED THE MOST REASONABLE MODEL.
WAVE GRIDS WERE ADJUSTED CONSERVATIVELY BASED ON A VERY GENERAL
INTERPRETATION OF WW3 MODEL VALUES...SINCE THOSE WAVE HEIGHT VALUES
SEEMED EXTREME FOR CURRENT SITUATION. IMPORTANT CAVEAT...IF THOSE
HIGHER VALUES PROVE ACCURATE...THEN HIGH SURF AND SMALL CRAFT
ADVISORIES MAY BE NEEDED BY WEEKEND.

&&

.EASTERN MICRONESIA...
WITH THE MONSOON TROUGH POSITIONED WEST OF THE REGION...MAINLY QUIET
TRADE-WIND WEATHER IS EXPECTED FOR THE NEXT FEW DAYS WITH NOTHING
MORE SIGNIFICANT THAN ISOLATED SHOWERS AND THUNDERSTORMS. THE
TRADE-WIND DISTURBANCE SOUTH OF MAJURO SHOULD WEAKEN OVERNIGHT AND
STAY SOUTH OF BOTH MAJURO AND KOSRAE. NO OTHER MAJOR WEATHER SYSTEMS
ARE FORESEEN THROUGH MONDAY.

&&

.WESTERN MICRONESIA...
THE BROAD MONSOON CIRCULATION CENTERED NORTHWEST OF CHUUK NEAR
8N148E IS FORECAST BY THE MODELS TO MOVE WEST-NORTHWEST BETWEEN GUAM
AND YAP THE NEXT FEW DAYS AS IT SLOWLY DEVELOPS. THE GFS IS MORE
AGGRESSIVE WITH SPINNING UP THE WINDS THAN THE ECMWF...BUT THE GFS
LOOKS TOO FAST WITH DEVELOPMENT. EVEN SO...KOROR SHOULD SEE 20 KT
WITH GUSTS TO 30 KT THROUGH THURSDAY NIGHT...AND YAP WILL LIKELY SEE
20-25 KT WITH GUSTS TO 35 KT THURSDAY NIGHT THROUGH FRIDAY NIGHT.
MODELS HAVE DIMINISHED THE RAIN POTENTIAL FOR KOROR...BUT YAP SHOULD
STILL SEE SEVERAL INCHES THURSDAY NIGHT THROUGH FRIDAY NIGHT. OUT
ON THE EASTERN EDGE OF THE CIRCULATION...CHUUK SHOULD GET SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS THROUGH THURSDAY NIGHT...BUT
WINDS ONLY UP TO 15 KT.

HAVE ISSUED A HIGH SURF ADVISORY FOR KOROR...WHERE 7-9 FT SURF LOOKS
LIKELY ALONG WEST AND SOUTHWEST FACING REEFS. FOR YAP...HIGH SURF
SHOULD BEGIN BY LATE THURSDAY AFTERNOON...SO ADVISORY WILL BE ISSUED
ON THE NEXT FORECAST PACKAGE AT 5 AM GUAM TIME.

&&

.GUM WATCHES/WARNINGS/ADVISORIES...
GU...NONE.
MARIANAS WATERS...NONE.
&&

SIMPSON/MIDDLEBROOKE

Event by event

1 tropical storm. Local standard time, as filed.

Tropical Storm, Guam

When: July 3, 12:00 AM GST to July 5, 12:00 AM GST
Where: Guam forecast zone
Property damage: $1.5 million
Reported by: Newspaper

On the 1st of July scatterometer data showed a circulation near Chuuk. This circulation increased in intensity as it moved west and eventually became Tropical Depression 08W on 3 July.

On the 4th of July, further intensification caused the depression to become Tropical Storm Neoguri when it was southwest of Guam.

Despite being 170 miles away winds north of the storm caused minor tree damage across Guam. The winds also helped produced isolated power outages across the island. Observations across Guam showed that on the 4th of July winds gusted to between 62 mph and 67 mph.

On the morning of 5 July Neoguri became a typhoon. At this time the system was west of Guam.

Neoguri was associated with a surge in the monsoon. The surge produced a large area of higher winds across the Western Pacific. These winds generated ocean swells that moved towards the Marianas. These swells from the surge and from Neoguri caused damage to two docks at the Agat Marina. Agat Mariana Docks B and C where |damaged with an estimated repair price of $1.5 million dollars.

Observations from the Ritidian buoy (NW of Guam) and the Tanapag buoy (WNW of Saipan) showed 16 to 17 foot seas. This produced an estimated surf of 18 to 20 feet surf across the shore lines of the Marianas. This produced up to 5 feet of inundation in some areas.

The surf was reported to have been large enough to cause some waves to ride up the 100-foot high cliffs of Orote Point and crash over several houses on the Navy Base in Guam.

What these are

Tropical Storm: A tropical cyclone with sustained winds of 34 to 63 knots (39 to 73 mph).

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

The same day elsewhere

More

Every storm in Guam in 2014 Every state in 2014 This day in weather history Warnings in Guam, July 2014 The 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: 538419.