TYPHOON WATCH  

Saipan, MP

Typhoon Watch issued April 11 at 1:03PM ChST by NWS Tiyan GU

TYPHOON WATCH REMAINS IN EFFECT

Areas Affected: Guam; Rota; Tinian; Saipan

Urgency: Future

Severity: Severe

Certainty: Possible

Alert Sent: Saturday 1:03pm ChST

Alert Effective: Saturday 1:03pm ChST

Alert Expires: Saturday 4:00pm ChST

Event Onset: Saturday 1:03pm ChST

Issued by: NWS Tiyan GU

...TYPHOON WATCH REMAINS IN EFFECT...

...TROPICAL STORM SINLAKU SLOWLY INTENSIFYING NEAR CHUUK BEFORE
HEADING TOWARD THE MARIANAS...

.NEW INFORMATION...
None.

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

.WATCHES/WARNINGS...
A Typhoon Watch remains in effect for Guam, Rota, Tinian, and
Saipan.

A Typhoon Watch means that Typhoon conditions, including winds of 74
mph or more, are possible within 48 hours.

A Flood Watch remains in effect for Guam and the Northern Marianas.
Please listen closely for any Flash Flood Warnings that might be in
effect once flood threats arrive.

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

.STORM INFORMATION...
At 10 AM ChST...the center of Tropical Storm Sinlaku (04W) was
located near latitude 8.5N...longitude 151.5E. This was about 570
miles southeast of Guam. The system has been nearly stationary. It is
expected to make a turn toward the north-northwest with an increase
in forward speed through Sunday as it treks toward the Marianas.

Maximum sustained winds remain at 70 mph. Sinlaku is forecast to
intensify through tonight, possibly becoming a typhoon as early as
late afternoon today.

.SITUATION OVERVIEW...
A Typhoon Watch has been issued. Tropical Storm Sinlaku (04W)
continues to meander in Chuuk State, bringing intense showers,
thunderstorms, and winds as it continues to consolidate and intensify
before beginning its journey toward the Marianas over the next
several days.

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, cover all windows and doors with
shutters or plywood. Move patio furniture and other loose objects
indoors. Brace all exterior doors, including garage doors. Do
this as early as possible. If you need to make a trip to the hardware
store, the grocery store, or the gas station, do so as early as
possible.

Stay calm and keep informed. Comply with any evacuation orders that
are issued for your area. If you live in a metal roof or container
home, or you live in a surge zone or any location prone to flooding,
evacuate to a designated shelter or ride out the storm in the sturdy
home of family or friends outside of evacuation zones.

ID: urn:oid:2.49.0.1.840.0.0880859cfc16858b50525c4a96ef44af8452b0a2.001.1
Codes: GUZ001, MPZ001, MPZ002, MPZ003
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.0880859cfc16858b50525c4a96ef44af8452b0a2.001.1

    HIGH SURF ADVISORY  

Saipan, MP

High Surf Advisory issued April 11 at 3:57AM ChST until April 16 at 6:00PM ChST by NWS Tiyan GU

HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 PM CHST THURSDAY... ...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH THURSDAY AFTERNOON

Areas Affected: Guam; Rota; Tinian; Saipan

Urgency: Expected

Severity: Minor

Certainty: Likely

Alert Sent: Saturday 3:57am ChST

Alert Effective: Saturday 3:57am ChST

Alert Expires: Saturday 6:00pm ChST (expect updated alert by this time)

Event Onset: Saturday 3:57am ChST

Event Ends: Thursday 6:00pm ChST

Issued by: NWS Tiyan GU

...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 PM CHST THURSDAY... ...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH THURSDAY AFTERNOON...

* WHAT...Large breaking waves of 8 to 12 feet and dangerous rip
currents.

* WHERE...North and east facing reefs of the Marianas.

* WHEN...For the High Surf Advisory, until 6 PM ChST Thursday.
For the High Rip Current Risk, through Thursday afternoon.

* IMPACTS...Dangerous swimming and surfing conditions and
localized beach erosion. Rip currents can sweep even the best
swimmers away from shore into deeper water.

* ADDITIONAL DETAILS...Strong to near-gale trade winds, enhanced by
TS Sinlaku, are producing an east swell near 10 feet. This will
produce hazardous surf of 8 to 10 feet along north facing reefs
and 10 to 12 feet along east facing reefs. Surf is expected to
continue to build through Sunday, with dangerous surf likely by
Sunday afternoon.

Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.
If caught in a rip current, relax and float. Don't swim against
the current. If able, swim in a direction following the
shoreline. If unable to escape, face the shore and call or wave
for help.

ID: urn:oid:2.49.0.1.840.0.0431c069a106a22307fec1d20e05a6e20268405d.001.1
Codes: GUZ001, MPZ001, MPZ002, MPZ003
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.0431c069a106a22307fec1d20e05a6e20268405d.001.1

    RIP CURRENT STATEMENT  

Saipan, MP

Rip Current Statement issued April 11 at 3:57AM ChST until April 16 at 6:00PM ChST by NWS Tiyan GU

HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 PM CHST THURSDAY... ...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH THURSDAY AFTERNOON

Areas Affected: Guam; Rota; Tinian; Saipan

Urgency: Expected

Severity: Moderate

Certainty: Likely

Alert Sent: Saturday 3:57am ChST

Alert Effective: Saturday 3:57am ChST

Alert Expires: Saturday 6:00pm ChST (expect updated alert by this time)

Event Onset: Saturday 3:57am ChST

Event Ends: Thursday 6:00pm ChST

Issued by: NWS Tiyan GU

...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 PM CHST THURSDAY... ...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH THURSDAY AFTERNOON...

* WHAT...Large breaking waves of 8 to 12 feet and dangerous rip
currents.

* WHERE...North and east facing reefs of the Marianas.

* WHEN...For the High Surf Advisory, until 6 PM ChST Thursday.
For the High Rip Current Risk, through Thursday afternoon.

* IMPACTS...Dangerous swimming and surfing conditions and
localized beach erosion. Rip currents can sweep even the best
swimmers away from shore into deeper water.

* ADDITIONAL DETAILS...Strong to near-gale trade winds, enhanced by
TS Sinlaku, are producing an east swell near 10 feet. This will
produce hazardous surf of 8 to 10 feet along north facing reefs
and 10 to 12 feet along east facing reefs. Surf is expected to
continue to build through Sunday, with dangerous surf likely by
Sunday afternoon.

Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.
If caught in a rip current, relax and float. Don't swim against
the current. If able, swim in a direction following the
shoreline. If unable to escape, face the shore and call or wave
for help.

ID: urn:oid:2.49.0.1.840.0.0431c069a106a22307fec1d20e05a6e20268405d.001.2
Codes: GUZ001, MPZ001, MPZ002, MPZ003
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.0431c069a106a22307fec1d20e05a6e20268405d.001.2

    FLOOD WATCH  

Saipan, MP

Flood Watch issued April 11 at 8:05AM ChST until April 15 at 10:00AM ChST by NWS Tiyan GU

FLOOD WATCH IN EFFECT FROM SUNDAY EVENING THROUGH WEDNESDAY MORNING

Areas Affected: Guam; Rota; Tinian; Saipan

Urgency: Future

Severity: Severe

Certainty: Possible

Alert Sent: Saturday 8:05am ChST

Alert Effective: Saturday 8:05am ChST

Alert Expires: Saturday 6:00pm ChST (expect updated alert by this time)

Event Onset: Sunday 6:00pm ChST

Event Ends: Wednesday 10:00am ChST

Issued by: NWS Tiyan GU

...FLOOD WATCH IN EFFECT FROM SUNDAY EVENING THROUGH WEDNESDAY MORNING...

* WHAT...Flash flooding caused by excessive rainfall is possible.

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

* WHEN...From Sunday evening through Wednesday morning.

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

* ADDITIONAL DETAILS...
- Tropical Storm Sinlaku is slowly approaching the Marianas and
is expected to strengthen, possibly crossing Guam as a
typhoon possibly as early as Monday morning.

This is expected to produce 15 to 20 inches of rainfall
between Sunday night and Wednesday for Guam and Rota, with 8
to 15 inches expected for Tinian and Saipan. Widespread
showers, torrential rain and scattered thunderstorms are
expected as Sinlaku moves through the Marianas Monday through
Wednesday morning.

As showers are likely to persist, consistent rainfall is
likely to
produce flash floods and saturate the soils enough to
increase the
chance for mudslides over central to southern Guam.
- http://www.weather.gov/safety/flood

Residents of the Marianas need to closely monitor this developing
situation as flash flood warnings will likely be issued later.

If living near streams and rivers, move items away from stream and
river banks. Make sure storm drains nearby are not clogged,
especially If living at low-lying areas.

ID: urn:oid:2.49.0.1.840.0.6c5c6c7685a2973cfd841c565f7b1cba8e9817e9.001.1
Codes: GUZ001, MPZ001, MPZ002, MPZ003
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6c5c6c7685a2973cfd841c565f7b1cba8e9817e9.001.1

    SPECIAL WEATHER STATEMENT  

Saipan, MP

Special Weather Statement issued April 10 at 7:10PM ChST by NWS Tiyan GU

Areas Affected: Guam; Rota; Tinian; Saipan

Urgency: Expected

Severity: Moderate

Certainty: Observed

Alert Sent: Friday 7:10pm ChST

Alert Effective: Friday 7:10pm ChST

Alert Expires: Saturday 8:15pm ChST

Event Onset: Friday 7:10pm ChST

Issued by: NWS Tiyan GU

Tropical Storm Sinlaku (04W) continues to organize north-northwest of
Chuuk. This system is currently moving very slowly in a west to
northwest direction, and this trend is expected to continue for
another roughly another 24 to 36 hours, before increasing slightly
in forward speed. TS Sinlaku is expected to strengthen as it
approaches the Marianas, possibly crossing Guam as a category 3
typhoon. Models continue to show a slight spread where TS Sinlaku's
track could shift slightly north or south, though these ranges are
narrowing and will continue to narrow over the next 12-24 hours.

A breezy, but relatively dry trade-wind pattern is in place over the
Marianas tonight, but as Tropical Storm Sinlaku closes in, winds are
expected to increase with conditions deteriorating sometime late
Sunday. The Marianas should make preparations for the potential for
Tropical Storm to Typhoon-Force winds, with the most likely time of
Tropical Storm-Force winds around Monday. For the far northern
Mariana Islands, breezy and choppy sea conditions are expected late
this weekend and into early next week, with potential for Tropical
Storm-Force winds around Tuesday.

This is expected to produce 15 to 20 inches of rainfall between
Sunday night and Wednesday for Guam and Rota, with 8 to 15 inches
expected for Tinian and Saipan. Widespread showers, torrential rain
and scattered thunderstorms are expected as Sinlaku moves through
the Marianas Tuesday through Tuesday night. As showers are likely to
persist, consistent rainfall is likely to produce flash floods and
saturate the soils enough to increase the chance for mudslides over
central to southern Guam.

ID: urn:oid:2.49.0.1.840.0.9b21cf6191a6bf267be7d1413bc00a7d7c2badf5.001.1
Codes: GUZ001, MPZ001, MPZ002, MPZ003
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9b21cf6191a6bf267be7d1413bc00a7d7c2badf5.001.1