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WTPQ81 PGUM 161703
HLSPQ1

URGENT - IMMEDIATE BROADCAST REQUESTED
Typhoon Sinlaku (04W) Local Statement
National Weather Service Tiyan GU
303 AM ChST Fri Apr 17 2026

...TYPHOON SINLAKU MOVING NORTH-NORTHEAST THROUGH THE NORTHERN
CNMI TO THE WEST OF AGRIHAN...

.NEW INFORMATION...
The Typhoon Warning has been cancelled for the island of Rota
and adjacent coastal waters.

.AREAS AFFECTED...
This local statement provides important information and
recommended actions for people in the Northern Marianas.

.WATCHES/WARNINGS...
A Typhoon Warning continues for Tinian and Saipan and their adjacent
coastal waters, Alamagan, Pagan, and Agrihan.

Although tropical cyclone watches or warnings are not in effect
for Rota...possible impacts from related hazards are still a
concern.

Please check the latest public and marine forecasts for detailed
information about additional hazards.

.STORM INFORMATION...
At 2 AM ChST...the center of Typhoon Sinlaku (04W) was located
near latitude 18.7N...longitude 144.9E. This was about 360 miles
north of Guam. Storm motion was north-northeast, 20 degrees, at
9 mph. Storm intensity was 105 mph.

.SITUATION OVERVIEW...
The eye of Typhoon Sinlaku (04W) is moving north-northeast and has
picked up forward speed since last night, moving at 9 mph. The eye is
currently west of Agrihan, well north-northwest of Tinian and
Saipan. With Sinlaku continuing to push northward, the wind field has
moved north of Rota. As Sinlaku moves through the northern CNMI this
morning, it is forecast to curve further to the northeast, passing
west, then north of Agrihan through this afternoon.

.PRECAUTIONARY/PREPAREDNESS ACTIONS...

For those under a warning in Tinian, Saipan, Alamagan, Pagan, and
Agrihan remain in a designated shelter or in a sturdy, fully
reinforced concrete building to ride out the storm until winds have
subsided and the "all clear" is given.

Stay inside and away from windows. Do not venture outside when
high winds are occurring as flying debris can easily cause serious
injury.

For those under a warning in the far northern Mariana Islands of
Alamagan, Pagan, and Agrihan, preparations for the protection of life
and property should have already been completed. People should be in
a designated hardened shelter. Remain in shelter until the "all
clear" is given.

Closely monitor NOAA weather radio or other local news outlets for
official storm information. Listen for possible changes to the
forecast.

&&

.NEXT UPDATE...
The next local statement will be issued by the National Weather
Service in Tiyan around 9 AM ChST this morning or sooner if
conditions warrant.

MPZ002-003-170115-
/O.CON.PGUM.TY.W.4004.000000T0000Z-000000T0000Z/
Tinian-Saipan-
303 AM ChST Fri Apr 17 2026

...Typhoon Warning remains in effect...

...PRECAUTIONARY/PREPAREDNESS ACTIONS...
People should remain in a designated shelter or in a sturdy and
reinforced concrete building to ride out the storm as tropical storm
force winds are occurring at Tinian, and Saipan. Due to the size of
the storm, the latest forecast has tropical storm force winds
continuing over northern Tinian waters over the next few hours this
morning, and through the morning hours today for Saipan. Even when
winds start to decrease, remain indoors until the "all clear" is
given. Strong to tropical storm force gusts remain a possibility for
the next day or two, especially with any passing shower.

Damage to remaining metal roof homes remains possible.
Electricity and water will remain unavailable for days and perhaps
weeks after the storm passes. Most trees will be snapped or
uprooted. Fallen trees may cut off residential areas for days to
weeks.

&&

...WIND INFORMATION...
Southwest tropical storm force winds of around 35 to 45 mph with
gusts to 55 mph are possible early this morning as the eye continues
to move slowly north, away from the islands, decreasing to 25 to 35
mph later this morning.

...COASTAL INUNDATION AND SURF INFORMATION...
Dangerous surf at Tinian and Saipan, 12 to 18 feet is possible along
north, south and west facing reefs as winds have shifted southwest,
limiting surf along east facing reefs at this time. Sinlaku is
producing a fully developed northwest to north swell as well. For
Tinian and Saipan, inundation of 3 to 5 feet is expected. A Coastal
Flood Warning remains in effect for Tinian and Saipan. Surf will be
slow to decrease after Sinlaku`s exit to the northwest for the
remainder of the week, as swells will continue to pummel western
Marianas shores.

...OTHER STORM EFFECTS...
A few brief showers may continue this morning as the outer bands of
Typhoon Sinlaku continue to lift northward. Additional rainfall will
generally remain below a half inch through today.

&&

...ALAMAGAN...

...A TYPHOON WARNING REMAINS EFFECT FOR ALAMAGAN...

...PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay indoors during heavy rain and windy conditions associated with
Typhoon Sinlaku (04W). The window of time to complete preparations
for the protection of life and property has closed. Find shelter to
ride out the storm. Remain in a sturdy shelter until the "all clear"
is given. Heed the advice of your local emergency managers and
officials, and continue to monitor forecasts by your local National
Weather Service office in Tiyan, Guam.

.WIND INFORMATION...
southwesterly tropical storm force winds around 65 mph are expected
this morning with typhoon winds around 75 mph possible as Sinlaku
passes to the northwest. The size of the storm and overall storm
motion will maintain southwest tropical storm winds through this
afternoon as Sinlaku continues on its accelerated northward trek
after exiting the Marianas later in the week.

.COASTAL INUNDATION AND SURF INFORMATION...
Seas of 20 to 25 feet remain possible, with dangerous surf and
significant coastal inundation and beach erosion possible.

.OTHER STORM EFFECTS...
Heavy, intense rainfall with TY Sinlaku is likely today, bringing
additional rainfall amounts of 3 to 5 inches by the weekend, with
rainfall amounts upwards of 10 to 15 inches near the center, as the
system moves across the northern CNMI. The exact track of Sinlaku
will determine where the heaviest rainfall will set up across the
islands.

...PAGAN...

...A TYPHOON WARNING REMAINS IN EFFECT FOR PAGAN...

...PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay indoors during heavy rain and windy conditions associated with
Typhoon Sinlaku (04W). The window of time to complete preparations
for the protection of life and property has closed. Find shelter to
ride out the storm. Remain in a sturdy shelter until the "all clear"
is given. Heed the advice of your local emergency managers and
officials, and continue to monitor forecasts by your local National
Weather Service office in Tiyan, Guam.

.WIND INFORMATION...
Southerly typhoon force winds around 75 mph as Sinlaku passes to the
northwest, and winds shift toward the southwest to . The size of the
storm and overall storm motion will maintain southwest tropical
storm winds through this evening as Sinlaku continues on its
accelerated northward trek after exiting the Marianas later in the
week.

.COASTAL INUNDATION AND SURF INFORMATION...
Seas of 20 to 25 feet remain possible, with dangerous surf and
significant coastal inundation and beach erosion possible.

.OTHER STORM EFFECTS...
Heavy, intense rainfall with TY Sinlaku is likely today, bringing
additional rainfall amounts of 4 to 6 inches by the weekend, with
rainfall amounts upwards of 10 to 15 inches near the center, as the
system moves across the northern CNMI. The exact track of Sinlaku
will determine where the heaviest rainfall will set up across the
islands.

&&

...AGRIHAN...

...A TYPHOON WARNING REMAINS IN EFFECT FOR AGRIHAN...

..PRECAUTIONARY/PREPAREDNESS ACTIONS...
Stay indoors during heavy rain and windy conditions associated with
Typhoon Sinlaku (04W). The window of time to complete preparations
for the protection of life and property has closed. Find shelter to
ride out the storm. Remain in a sturdy shelter until the "all clear"
is given. Heed the advice of your local emergency managers and
officials, and continue to monitor forecasts by your local National
Weather Service office in Tiyan, Guam.

.WIND INFORMATION...
Southeasterly typhoon winds around 95 mph possible this morning as
Sinlaku passes nearby to the west, and winds shift toward the south.
The size of the storm and overall storm motion will maintain south to
southwest tropical storm winds into tonight as Sinlaku continues on
its accelerated northward trek after exiting the Marianas.

.COASTAL INUNDATION AND SURF INFORMATION...
Seas of 20 to 30 feet will be possible, with dangerous surf and
significant coastal inundation and beach erosion possible.

.OTHER STORM EFFECTS...
Heavy, intense rainfall with TY Sinlaku is likely today bringing
additional rainfall amounts of 5 to 8 inches by the weekend, with
rainfall amounts upwards of 10 to 15 inches near the center, as the
system moves across the northern CNMI. The exact track of Sinlaku
will determine where the heaviest rainfall will set up across the
islands.

$$

MPZ001-170000-
/O.CAN.PGUM.TY.W.4004.000000T0000Z-000000T0000Z/
/O.NEW.PGUM.HU.S.4004.260416T1703Z-260417T0000Z/
Rota-
303 AM ChST Fri Apr 17 2026

...TYPHOON WARNING HAS BEEN CANCELLED...

...PRECAUTIONARY/PREPAREDNESS ACTIONS...

Typhoon Sinlaku is now centered 315 miles north of Rota and
continues to pull away to the north. Rota and the adjacent
coastal waters are now fully outside of the tropical storm force
wind field, but tropical storm force gusts to around 40 mph look
to continue early this morning, with even higher gusts possible
near any passing shower. Dangerous surf of 12 to 16 feet are
still occurring across south, west, and north facing reefs of
Rota, driven by the southwesterly winds. The threat of coastal
inundation is starting to diminish this afternoon, but minor
coastal flooding of up to 2 feet will remain possible into the
weekend along south, west, and north facing reefs of Rota, mainly
along west facing shores and beaches due to the wind driven waves.
Surf will be slow to decrease over the next few days as swell
from Sinlaku continues to pummel northern and western Marianas
shores.


$$