TYPHOON WARNING  

Tinian, MP

Typhoon Warning issued April 13 at 3:24PM ChST by NWS Tiyan GU

TYPHOON WARNING REMAINS IN EFFECT

Areas Affected: Rota; Tinian; Saipan

Urgency: Immediate

Severity: Extreme

Certainty: Likely

Alert Sent: Monday 3:24pm ChST

Alert Effective: Monday 3:24pm ChST

Alert Expires: Monday 11:30pm ChST

Event Onset: Monday 3:24pm ChST

Issued by: NWS Tiyan GU

...TYPHOON WARNING REMAINS IN EFFECT...

...SUPER TYPHOON SINLAKU MOVING NORTHWEST TOWARD THE MARIANAS...

.NEW INFORMATION...
A Tropical Storm Warning has been issued for Pagan and Alamagan.
A Tropical Storm Watch has been issued for Agrihan.
The Tropical Storm Warning and Typhoon Watch for Ulul in Chuuk
State have been cancelled.

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

.WATCHES/WARNINGS...
A Tropical Storm Warning is now in effect for Pagan and Alamagan.

A Tropical Storm Watch has been issued for Agrihan.

The Tropical Storm Warning and Typhoon Watch for Ulul in Chuuk
State have been cancelled.

A Typhoon Warning remains in effect for Rota, Tinian, and Saipan.

A Tropical Storm Warning and Typhoon Watch remain in effect for
Guam.

A Flood Watch is in effect for all of Guam and the Northern
Marianas. Please listen closely for any Flood Warnings that might
be in effect for your area.

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

.STORM INFORMATION...
At 2 PM ChST, the center of Super Typhoon Sinlaku (04W) was
located by PGUA radar near latitude 12.6N, longitude 148.2E. This
was about 230 miles east-southeast of Guam. Storm motion was
west-northwest, 300 degrees, at 8 mph. Storm intensity was 180
mph.

.SITUATION OVERVIEW...
Super Typhoon Sinlaku (04W) continues to move west-northwest
toward the Marianas with a slight northwest turn expected. The
outer rain bands of Sinlaku are beginning to rotate in over the
islands, and continue to bring periods of heavy showers,
thunderstorms, and strong winds for the far outer islands of
northwest Chuuk. However, tropical storm winds of 39 mph or
greater have moved away from Ulul. The most recent storm track
produced by the Joint Typhoon Warning Center (JTWC) has shown a
slight northward shift in the storm path during its passage toward
the Marianas, still maintaining a track north of Rota and near or
over Tinian and Saipan. Sinlaku is expected to gradually weaken
the next few days, but still expected to cross the Marianas as a
category 4 or 5 typhoon.

The window of time to complete preparations for the protection of
life and property is very soon to close. If evacuating to a
public shelter, leave as soon as possible. Guard against being
stuck out on roadways when dangerous winds and heavy rains arrive.
Again, do not stay in a metal roof or container home. Items to
bring to a shelter include a first aid kit, medicines and
prescriptions, baby food and diapers, games and books, toiletries,
a battery powered radio, a cell phone, flashlights with extra
batteries, a blanket or sleeping bag for each person, personal
identification, copies of key papers such as insurance policies,
available cash and credit cards. Remember, pets are not allowed in
most public shelters, so check ahead with your intended shelter.

Regarding your home or business, finish covering all windows and
doors with shutters or plywood. Move patio furniture and other loose
objects indoors. Brace all exterior doors.

If staying in a home, turn the refrigerator to maximum cold and keep
it closed. Turn off propane tanks and unplug small appliances. Fill
the bathtub with water in case the tap water becomes unavailable
after the storm. This is for cleaning and flushing purposes. Do not
drink it.

Stay indoors during heavy rain and windy conditions associated with
Super Typhoon Sinlaku (04W). 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. Remain in a
sturdy shelter until the all clear is given.

.WIND INFORMATION...
Fresh to strong northeasterlies are expected to begin increasing
tonight, with tropical storm force winds expected late morning or
early afternoon on Tuesday, maintaining these conditions for
several days after if Sinlaku continues on its accelerated
northward trek after exiting the Marianas in the second half of
the week.

.COASTAL INUNDATION AND SURF INFORMATION...
Seas of 20 to 30 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 for much of the
week, bringing rainfall amounts of 10 to 13 inches by Friday, with
rainfall amounts upwards of 15 to 25 inches near the center, as
the system crosses the Marianas. The exact track of Sinlaku will
determine where the heaviest rainfall will set up across the
islands.

Stay indoors during heavy rain and windy conditions associated with
Super Typhoon Sinlaku (04W). 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. Remain in a
sturdy shelter until the all clear is given.

.WIND INFORMATION...
Fresh to strong northeasterlies are expected to begin increasing
tonight, with tropical storm force winds expected late morning or
early afternoon on Tuesday, maintaining these conditions for
several days after if Sinlaku continues on its accelerated
northward trek after exiting the Marianas in the second half of
the week.

.COASTAL INUNDATION AND SURF INFORMATION...
Seas of 20 to 30 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 for much of the
week, bringing rainfall amounts of 10 to 13 inches by Friday, with
rainfall amounts upwards of 15 to 25 inches near the center, as
the system crosses the Marianas. The exact track of Sinlaku will
determine where the heaviest rainfall will set up across the
islands.

Stay indoors during heavy rain and windy conditions associated with
Super Typhoon Sinlaku (04W). 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. Remain in a
sturdy shelter until the all clear is given.

.WIND INFORMATION...
Fresh northeasterlies are expected to begin increasing through
Tuesday, with tropical storm force winds possible Wednesday
morning, maintaining these conditions for several days after if
Sinlaku continues on its accelerated northward trek after exiting
the Marianas in the second half of the week.

.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 for much of the
week, with rainfall amounts upwards of 15 to 25 inches near the
center, as the system crosses the Marianas. The exact track of
Sinlaku will determine where the heaviest rainfall will set up
across the islands.

...ULUL...

...TYPHOON WATCH IS CANCELLED FOR ULUL IN CHUUK STATE...
...TROPICAL STORM WARNING IS CANCELLED FOR ULUL IN CHUUK STATE...

The Tropical Storm Warning and Typhoon Watch have been cancelled
for Ulul in Chuuk State. Do not leave shelter or attempt any
inter-island travel until winds and seas subside. Listen to
instructions and updates from your local leaders.

.WIND INFORMATION...
The highest winds associated with Super Typhoon Sinlaku (04W) passed
to the north-northwest of Ulul. South to southwest winds of 25 to 35
mph with occasional gusts to 45 mph will steadily subside over the
next couple of days and shift to the southeast as Sinlaku continues
to move away.

.COASTAL INUNDATION AND SURF INFORMATION...
Seas of 12 to 15 feet are decreasing to 9 to 12 feet tonight, holding
steady over the next few days as distant swells generated by Super
Typhoon Sinlaku continue to influence the region. Dangerous surf of
12 to 16 feet along north and west facing reefs, with up to 2 feet
of inundation remain likely. Elsewhere, hazardous surf of 7 to 10
feet are expected.

.OTHER STORM EFFECTS...
Satellite microwave estimates and model guidance continue to suggest
the potential for heavy rain to continue decreasing as Sinlaku moves
away. Additional rainfall of 1 to 3 inches is possible tonight.

ID: urn:oid:2.49.0.1.840.0.5ddf73847936c0e51298e9b56b024d1b2234f605.002.1
Codes: MPZ001, MPZ002, MPZ003
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5ddf73847936c0e51298e9b56b024d1b2234f605.002.1

    COASTAL FLOOD WARNING  

Tinian, MP

Coastal Flood Warning issued April 13 at 3:54PM ChST until April 16 at 5:00AM ChST by NWS Tiyan GU

COASTAL FLOOD WARNING IN EFFECT UNTIL 5 AM CHST THURSDAY... ...COASTAL FLOOD WATCH UPGRADED TO A WARNING... ...HIGH SURF WARNING IN IN EFFECT UNTIL 6 PM CHST THURSDAY

Areas Affected: Guam; Rota; Tinian; Saipan

Urgency: Expected

Severity: Severe

Certainty: Likely

Alert Sent: Monday 3:54pm ChST

Alert Effective: Monday 3:54pm ChST

Alert Expires: Tuesday 6:00am ChST (expect updated alert by this time)

Event Onset: Monday 3:54pm ChST

Event Ends: Thursday 5:00am ChST

Issued by: NWS Tiyan GU

...COASTAL FLOOD WARNING IN EFFECT UNTIL 5 AM CHST THURSDAY... ...COASTAL FLOOD WATCH UPGRADED TO A WARNING... ...HIGH SURF WARNING IN IN EFFECT UNTIL 6 PM CHST THURSDAY...

* WHAT...For the High Surf Warning, dangerously large breaking waves
of 12 to 16 feet for Guam and 15 to 25 ft for Rota, Tinian and
Saipan. For the Coastal Flood Watch, significant coastal flooding 1
to 3 ft for Guam, and 4 to 8 ft for Rota, Tinian, and Saipan.

* WHERE...North, east and south facing reefs of the Marianas. For the
Coastal Flood Watch, north, east, and south facing shorelines.

* WHEN...For the High Surf Warning, until 6 PM ChST Thursday. For
the Coastal Flood Watch, through Wednesday afternoon.

* IMPACTS...Numerous roads may be closed. Low lying property
including homes, businesses, and some critical infrastructure may
be inundated. Some shoreline erosion may occur. Breaking waves can
sweep people off jetties and docks, and into dangerous seas. Life-
threatening swimming conditions and significant beach erosion can
be expected.

* ADDITIONAL DETAILS...As STY Sinlaku moves towards the Marianas
swell and surf will continue to build. This will maintain dangerous
surf and coastal inundation, especially as STY Sinlaku begins to
move through the Marianas on Tuesday. Inundation has already been
reported at Inarajan Pools.

Everyone should remain out of the water due to life-threatening
surf conditions. Stay off of jetties, piers, and other waterside
infrastructure.

ID: urn:oid:2.49.0.1.840.0.af5b7ab49cfb41770c35506f39ae654d2a341059.001.2
Codes: GUZ001, MPZ001, MPZ002, MPZ003
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.af5b7ab49cfb41770c35506f39ae654d2a341059.001.2

    HIGH SURF WARNING  

Tinian, MP

High Surf Warning issued April 13 at 3:54PM ChST until April 16 at 6:00PM ChST by NWS Tiyan GU

COASTAL FLOOD WARNING IN EFFECT UNTIL 5 AM CHST THURSDAY... ...COASTAL FLOOD WATCH UPGRADED TO A WARNING... ...HIGH SURF WARNING IN IN EFFECT UNTIL 6 PM CHST THURSDAY

Areas Affected: Guam; Rota; Tinian; Saipan

Urgency: Expected

Severity: Moderate

Certainty: Likely

Alert Sent: Monday 3:54pm ChST

Alert Effective: Monday 3:54pm ChST

Alert Expires: Tuesday 6:00am ChST (expect updated alert by this time)

Event Onset: Monday 3:54pm ChST

Event Ends: Thursday 6:00pm ChST

Issued by: NWS Tiyan GU

...COASTAL FLOOD WARNING IN EFFECT UNTIL 5 AM CHST THURSDAY... ...COASTAL FLOOD WATCH UPGRADED TO A WARNING... ...HIGH SURF WARNING IN IN EFFECT UNTIL 6 PM CHST THURSDAY...

* WHAT...For the High Surf Warning, dangerously large breaking waves
of 12 to 16 feet for Guam and 15 to 25 ft for Rota, Tinian and
Saipan. For the Coastal Flood Watch, significant coastal flooding 1
to 3 ft for Guam, and 4 to 8 ft for Rota, Tinian, and Saipan.

* WHERE...North, east and south facing reefs of the Marianas. For the
Coastal Flood Watch, north, east, and south facing shorelines.

* WHEN...For the High Surf Warning, until 6 PM ChST Thursday. For
the Coastal Flood Watch, through Wednesday afternoon.

* IMPACTS...Numerous roads may be closed. Low lying property
including homes, businesses, and some critical infrastructure may
be inundated. Some shoreline erosion may occur. Breaking waves can
sweep people off jetties and docks, and into dangerous seas. Life-
threatening swimming conditions and significant beach erosion can
be expected.

* ADDITIONAL DETAILS...As STY Sinlaku moves towards the Marianas
swell and surf will continue to build. This will maintain dangerous
surf and coastal inundation, especially as STY Sinlaku begins to
move through the Marianas on Tuesday. Inundation has already been
reported at Inarajan Pools.

Everyone should remain out of the water due to life-threatening
surf conditions. Stay off of jetties, piers, and other waterside
infrastructure.

ID: urn:oid:2.49.0.1.840.0.af5b7ab49cfb41770c35506f39ae654d2a341059.001.3
Codes: GUZ001, MPZ001, MPZ002, MPZ003
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.af5b7ab49cfb41770c35506f39ae654d2a341059.001.3

    FLOOD WATCH  

Tinian, MP

Flood Watch issued April 13 at 4:53AM ChST until April 15 at 10:00AM ChST by NWS Tiyan GU

FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY MORNING

Areas Affected: Guam; Rota; Tinian; Saipan

Urgency: Future

Severity: Severe

Certainty: Possible

Alert Sent: Monday 4:53am ChST

Alert Effective: Monday 4:53am ChST

Alert Expires: Tuesday 5:00am ChST (expect updated alert by this time)

Event Onset: Monday 4:53am ChST

Event Ends: Wednesday 10:00am ChST

Issued by: NWS Tiyan GU

...FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY MORNING...

* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.

* WHERE...Guam, Rota, Saipan and Tinian.

* WHEN...Through Wednesday morning.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.

* ADDITIONAL DETAILS...
- - Super Typhoon Sinlaku is expected to approach the Marianas
over the next 12 to 36 hours, crossing near or over Tinian
and Saipan Tuesday night. Rainfall amounts upwards of 15 to
25 inches are possible near the center.

- With the recent northward shifts in the track, rainfall
totals of 6 to 12 inches, with locally higher amounts, are
more likely for Guam.

- Http://www.weather.gov/safety/flood
- http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

ID: urn:oid:2.49.0.1.840.0.f99cfb1594da942785bc6ea4a016c74efad44fc5.001.1
Codes: GUZ001, MPZ001, MPZ002, MPZ003
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f99cfb1594da942785bc6ea4a016c74efad44fc5.001.1