Rip Current Statement 11, NWS Guam

315 
WHMY40 PGUM 160550
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
350 PM ChST Thu Apr 16 2026

GUZ001-MPZ001-162000-
/O.CON.PGUM.CF.W.0001.000000T0000Z-260416T0700Z/
/O.CON.PGUM.SU.W.0005.000000T0000Z-260417T0700Z/
/O.CON.PGUM.CF.Y.0002.260416T0700Z-260418T0700Z/
/O.CON.PGUM.SU.Y.0038.260417T0700Z-260418T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260418T0700Z/
Guam-Rota-
350 PM ChST Thu Apr 16 2026

...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM CHST THIS
AFTERNOON...
...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 5 PM CHST FRIDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SATURDAY
AFTERNOON...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 5 PM CHST
SATURDAY...
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 PM FRIDAY TO 5 PM
CHST SATURDAY...

* WHAT...For the Coastal Flood Warning, significant coastal flooding
  of 2 to 3 feet. For the High Surf Warning, dangerously large
  breaking waves of 12 to 19 feet. For the Coastal Flood Advisory,
  minor coastal flooding of 1 to 2 feet expected. For the High Surf 
  Advisory, large breaking waves of 10 to 14 feet expected. For the 
  High Rip Current Risk, dangerous rip currents.

* WHERE...South, west and north facing reefs and shorelines of
  Guam and Rota.

* WHEN...For the Coastal Flood Warning, until 5 PM ChST this 
  afternoon. For the High Surf Warning, until 5 PM ChST Friday. For 
  the Coastal Flood Advisory, from 5 PM this afternoon to 5 PM ChST 
  Saturday. For the High Surf Advisory, from 5 PM Friday to 5 PM ChST
  Saturday. For the High Rip Current Risk, through Saturday 
  afternoon.

* IMPACTS...Some roads may be closed. Low lying property including 
  homes, businesses, and some critical infrastructure will be 
  inundated. Some shoreline erosion will 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. Rip currents can sweep even the best swimmers away 
  from shore into deeper water.

* ADDITIONAL DETAILS...As TY Sinlaku continues to move away and wind
  driven waves decrease, the primary swell and highest surf will be
  southwest. Seas will be slow to subside over the next couple of
  days. Surf heights of 12 to 17 feet are expected for Guam and 13 
  to 19 feet for Rota.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

MPZ002-003-162000-
/O.CON.PGUM.CF.W.0001.000000T0000Z-260417T0200Z/
/O.CON.PGUM.SU.W.0005.000000T0000Z-260417T0700Z/
/O.CON.PGUM.CF.Y.0002.260417T0200Z-260418T0700Z/
/O.CON.PGUM.SU.Y.0038.260417T0700Z-260418T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260418T0700Z/
Tinian-Saipan-
350 PM ChST Thu Apr 16 2026

...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CHST FRIDAY...
...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 5 PM CHST FRIDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SATURDAY
AFTERNOON...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM NOON FRIDAY TO
5 PM CHST SATURDAY...
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 PM FRIDAY TO 5 PM
CHST SATURDAY...

* WHAT...For the Coastal Flood Warning, significant coastal flooding
  of 5 to 8 feet. For the High Surf Warning, dangerously large
  breaking waves of 16 to 20 feet. For the Coastal Flood Advisory,
  minor coastal flooding of 1 to 2 feet expected. For the High Surf 
  Advisory, large breaking waves of 10 to 14 feet expected. For the 
  High Rip Current Risk, dangerous rip currents.

* WHERE...South, west and north facing reefs and shorelines of
  Tinian and Saipan.

* WHEN...For the Coastal Flood Warning, until noon ChST Friday. For 
  the High Surf Warning, until 5 PM ChST Friday. For the Coastal 
  Flood Advisory, from noon Friday to 5 PM ChST Saturday. For the 
  High Surf Advisory, from 5 PM Friday to 5 PM ChST Saturday. For the
  High Rip Current Risk, through Saturday afternoon.

* IMPACTS...Numerous roads may be closed. Low lying property 
  including homes, businesses, and some critical infrastructure will 
  be inundated. Some shoreline erosion will 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. Rip currents can sweep even the best swimmers away 
  from shore into deeper water.

* ADDITIONAL DETAILS...As TY Sinlaku continues to move away and wind
  driven waves decrease, the primary swell and highest surf will 
  become southwest. Seas will be slow to subside over the next couple
  of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

Kleeschulte

026 
WHMY40 PGUM 161156
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
956 PM ChST Thu Apr 16 2026

MPZ002-003-170200-
/O.CON.PGUM.CF.W.0001.000000T0000Z-260417T0200Z/
/O.CON.PGUM.SU.W.0005.000000T0000Z-260417T0700Z/
/O.CON.PGUM.CF.Y.0002.260417T0200Z-260418T0700Z/
/O.CON.PGUM.SU.Y.0038.260417T0700Z-260418T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260418T0700Z/
Tinian-Saipan-
956 PM ChST Thu Apr 16 2026

...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CHST
FRIDAY...
...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 5 PM CHST FRIDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SATURDAY
AFTERNOON...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM NOON FRIDAY TO
5 PM CHST SATURDAY...
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 PM FRIDAY TO 5 PM
CHST SATURDAY...

* WHAT...For the Coastal Flood Warning, significant coastal flooding
  of 5 to 8 feet. For the High Surf Warning, dangerously large
  breaking waves of 16 to 20 feet. For the Coastal Flood Advisory,
  minor coastal flooding of 1 to 2 feet expected. For the High Surf 
  Advisory, large breaking waves of 10 to 14 feet expected. For the 
  High Rip Current Risk, dangerous rip currents.

* WHERE...South, west and north facing reefs and shorelines of
  Tinian and Saipan.

* WHEN...For the Coastal Flood Warning, until noon ChST Friday.
  For the High Surf Warning, until 5 PM ChST Friday. For the
  Coastal Flood Advisory, from noon Friday to 5 PM ChST Saturday.
  For the High Surf Advisory, from 5 PM Friday to 5 PM ChST
  Saturday. For the High Rip Current Risk, through Saturday
   afternoon.

* IMPACTS...Numerous roads may be closed. Low lying property
  including homes, businesses, and some critical infrastructure
  will be inundated. Some shoreline erosion will 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. Rip currents can sweep even the best
  swimmers away from shore into deeper water.

* ADDITIONAL DETAILS...As TY Sinlaku continues to move away and
  wind driven waves decrease, the primary swell and highest surf
  will become southwest. Seas will be slow to subside over the next
  couple of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

GUZ001-MPZ001-170200-
/O.CON.PGUM.SU.W.0005.000000T0000Z-260417T0700Z/
/O.CON.PGUM.CF.Y.0002.000000T0000Z-260418T0700Z/
/O.CON.PGUM.SU.Y.0038.260417T0700Z-260418T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260418T0700Z/
Guam-Rota-
956 PM ChST Thu Apr 16 2026

...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 5 PM CHST FRIDAY...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 5 PM CHST
SATURDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SATURDAY
AFTERNOON...
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 PM FRIDAY TO 5 PM
CHST SATURDAY...

* WHAT...For the High Surf Warning, dangerously large breaking waves
  of 12 to 19 feet in the surf zone. For the Coastal Flood Advisory,
  minor coastal flooding of 1 to 2 feet. For the High Surf 
  Advisory, large breaking waves of 10 to 14 feet expected in the 
  surf zone. For the High Rip Current Risk, dangerous rip currents.

* WHERE...South, west and north facing reefs and shorelines of
  Guam and Rota.

* WHEN... For the High Surf Warning, until 5 PM ChST Friday. For the
  Coastal Flood Advisory, until 5 PM ChST Saturday. For the High 
  Surf Advisory, from 5 PM Friday to 5 PM ChST Saturday. For the High
  Rip Current Risk, through Saturday afternoon.

* IMPACTS...Flooding of lots, parks, and roads with only isolated
  road closures expected. Breaking waves can sweep people off 
  jetties and docks, and into dangerous seas. Life-threatening 
  swimming conditions and significant beach erosion can be expected. 
  Rip currents can sweep even the best swimmers away from shore into 
  deeper water.

* ADDITIONAL DETAILS...As TY Sinlaku continues to move away and wind
  driven waves decrease, the primary swell and highest surf will be 
  southwest. Seas will be slow to subside over the next couple of 
  days. Surf heights of 12 to 17 feet are expected for Guam and 13 to
  19 feet for Rota.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

Williams

656 
WHMY40 PGUM 161826
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
426 AM ChST Fri Apr 17 2026

MPZ002-003-170830-
/O.CON.PGUM.CF.W.0001.000000T0000Z-260417T0200Z/
/O.CON.PGUM.SU.W.0005.000000T0000Z-260417T0700Z/
/O.CON.PGUM.CF.Y.0002.260417T0200Z-260418T0700Z/
/O.CON.PGUM.SU.Y.0038.260417T0700Z-260418T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260418T0700Z/
Tinian-Saipan-
426 AM ChST Fri Apr 17 2026

...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CHST
TODAY...
...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 5 PM CHST THIS
AFTERNOON...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SATURDAY
AFTERNOON...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO
5 PM CHST SATURDAY...
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 5 PM CHST SATURDAY...

* WHAT...For the Coastal Flood Warning, significant coastal
  flooding of 4 to 6 feet. For the High Surf Warning, dangerously
  large breaking waves of 12 to 18 feet. For the Coastal Flood
  Advisory, minor coastal flooding of 1 to 2 feet expected. For the
  High Surf Advisory, large breaking waves of 10 to 14 feet
  expected. For the High Rip Current Risk, dangerous rip currents.

* WHERE...South, west and north facing reefs and shorelines of
  Tinian and Saipan.

* WHEN...For the Coastal Flood Warning, until noon ChST today.
  For the High Surf Warning, until 5 PM ChST today. For the
  Coastal Flood Advisory, from noon today to 5 PM ChST Saturday.
  For the High Surf Advisory, from 5 PM today to 5 PM ChST
  Saturday. For the High Rip Current Risk, through Saturday
  afternoon.

* IMPACTS...Numerous roads may be closed. Low lying property
  including homes, businesses, and some critical infrastructure
  will be inundated. Some shoreline erosion will 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. Rip currents can sweep even the best
  swimmers away from shore into deeper water.

* ADDITIONAL DETAILS...As TY Sinlaku continues to move away and
  wind driven waves decrease, the primary swell and highest surf
  will become southwest. Seas will be slow to subside over the next
  couple of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

GUZ001-MPZ001-170830-
/O.CON.PGUM.SU.W.0005.000000T0000Z-260417T0700Z/
/O.CON.PGUM.CF.Y.0002.000000T0000Z-260418T0700Z/
/O.CON.PGUM.SU.Y.0038.260417T0700Z-260418T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260418T0700Z/
Guam-Rota-
426 AM ChST Fri Apr 17 2026

...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 5 PM CHST THIS
AFTERNOON...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 5 PM CHST
SATURDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SATURDAY
AFTERNOON...
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 5 PM CHST SATURDAY...

* WHAT...For the High Surf Warning, dangerously large breaking
  waves of 12 to 18 feet in the surf zone. For the Coastal Flood
  Advisory, minor coastal flooding of 1 to 2 feet. For the High
  Surf Advisory, large breaking waves of 10 to 14 feet expected in
  the surf zone. For the High Rip Current Risk, dangerous rip
  currents.

* WHERE...South, west and north facing reefs and shorelines of
  Guam and Rota.

* WHEN... For the High Surf Warning, until 5 PM ChST today. For
  the Coastal Flood Advisory, until 5 PM ChST Saturday. For the
  High Surf Advisory, from 5 PM today to 5 PM ChST Saturday. For
  the High Rip Current Risk, through Saturday afternoon.

* IMPACTS...Flooding of lots, parks, and roads with only isolated
  road closures expected. Breaking waves can sweep people off
  jetties and docks, and into dangerous seas. Life-threatening
  swimming conditions and significant beach erosion can be
  expected. Rip currents can sweep even the best swimmers away from
  shore into deeper water.

* ADDITIONAL DETAILS...As TY Sinlaku continues to move away and
  wind driven waves decrease, the primary swell and highest surf
  will be southwest. Seas will be slow to subside over the next
  couple of days. Surf heights of 12 to 18 feet are expected for
  Guam and Rota.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

Williams

477 
WHMY40 PGUM 162334
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
934 AM ChST Fri Apr 17 2026

MPZ002-003-170800-
/O.EXT.PGUM.CF.W.0001.000000T0000Z-260417T1900Z/
/O.EXT.PGUM.SU.W.0005.000000T0000Z-260418T0000Z/
/O.EXT.PGUM.CF.Y.0002.260417T1900Z-260419T0100Z/
/O.EXT.PGUM.SU.Y.0038.260418T0000Z-260419T0700Z/
/O.EXT.PGUM.RP.S.0011.000000T0000Z-260419T0700Z/
Tinian-Saipan-
934 AM ChST Fri Apr 17 2026

...COASTAL FLOOD WARNING NOW IN EFFECT UNTIL 5 AM CHST SATURDAY...
...HIGH SURF WARNING NOW IN EFFECT UNTIL 10 AM CHST SATURDAY...
...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH SUNDAY AFTERNOON...
...COASTAL FLOOD ADVISORY NOW IN EFFECT FROM 5 AM SATURDAY TO
11 AM CHST SUNDAY...
...HIGH SURF ADVISORY NOW IN EFFECT FROM 10 AM SATURDAY TO 5 PM
CHST SUNDAY...

* WHAT...For the Coastal Flood Warning, significant coastal
  flooding of 4 to 6 feet. For the High Surf Warning, dangerously
  large breaking waves of 13 to 19 feet. For the Coastal Flood
  Advisory, minor coastal flooding of 1 to 2 feet expected. For
  the High Surf Advisory, large breaking waves of 10 to 14 feet
  expected. For the High Rip Current Risk, dangerous rip currents.

* WHERE...South, west and north facing reefs and shorelines of Tinian
  and Saipan.

* WHEN...For the Coastal Flood Warning, until 5 AM ChST Saturday.
  For the High Surf Warning, until 10 AM ChST Saturday. For the
  Coastal Flood Advisory, from 5 AM Saturday to 11 AM ChST Sunday.
  For the High Surf Advisory, from 10 AM Saturday to 5 PM ChST
  Sunday. For the High Rip Current Risk, through Sunday afternoon.

* IMPACTS...Numerous roads may be closed. Low lying property 
  including homes, businesses, and some critical infrastructure 
  will be inundated. Some shoreline erosion will 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. Rip currents can sweep even the 
  best swimmers away from shore into deeper water.

* ADDITIONAL DETAILS...As Typhoon Sinlaku continues to move away 
  and wind driven waves decrease, the primary swell and highest 
  surf will become southwest. Seas will be slow to subside over 
  the next couple of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

GUZ001-MPZ001-170800-
/O.EXT.PGUM.SU.W.0005.000000T0000Z-260418T0000Z/
/O.EXT.PGUM.SU.Y.0038.260418T0000Z-260419T0700Z/
/O.EXT.PGUM.RP.S.0011.000000T0000Z-260419T0700Z/
/O.CON.PGUM.CF.Y.0002.000000T0000Z-260418T0700Z/
Guam-Rota-
934 AM ChST Fri Apr 17 2026

...HIGH SURF WARNING NOW IN EFFECT UNTIL 10 AM CHST SATURDAY...
...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH SUNDAY AFTERNOON...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 5 PM CHST
SATURDAY...
...HIGH SURF ADVISORY NOW IN EFFECT FROM 10 AM SATURDAY TO 5 PM
CHST SUNDAY...

* WHAT...For the High Surf Warning, dangerously large breaking
  waves of 12 to 18 feet in the surf zone. For the Coastal Flood
  Advisory, minor coastal flooding of 1 to 2 feet. For the High
  Surf Advisory, large breaking waves of 10 to 14 feet expected in
  the surf zone. For the High Rip Current Risk, dangerous rip
  currents.

* WHERE...South, west and north facing reefs and shorelines of Guam 
  and Rota.

* WHEN...For the High Surf Warning, until 10 AM ChST Saturday.
  For the Coastal Flood Advisory, until 5 PM ChST Saturday. For the
  High Surf Advisory, from 10 AM Saturday to 5 PM ChST Sunday. For
  the High Rip Current Risk, through Sunday afternoon.

* IMPACTS...Flooding of lots, parks, and roads with only isolated
  road closures expected. Breaking waves can sweep people off 
  jetties and docks, and into dangerous seas. Life-threatening 
  swimming conditions and significant beach erosion can be 
  expected. Rip currents can sweep even the best swimmers away 
  from shore into deeper water.

* ADDITIONAL DETAILS...As TY Sinlaku continues to move away and
  wind driven waves decrease, the primary swell and highest surf
  will be southwest. Seas will be slow to subside over the next
  couple of days. Surf heights of 12 to 18 feet are expected for
  Guam and Rota.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

IC

627 
WHMY40 PGUM 170600
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
400 PM ChST Fri Apr 17 2026

MPZ002-003-172000-
/O.CON.PGUM.CF.W.0001.000000T0000Z-260417T1900Z/
/O.CON.PGUM.SU.W.0005.000000T0000Z-260418T0000Z/
/O.CON.PGUM.CF.Y.0002.260417T1900Z-260419T0100Z/
/O.CON.PGUM.SU.Y.0038.260418T0000Z-260419T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260419T0700Z/
Tinian-Saipan-
400 PM ChST Fri Apr 17 2026

...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 5 AM CHST 
SATURDAY...
...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 10 AM CHST SATURDAY... 
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY 
AFTERNOON... 
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 5 AM SATURDAY TO 11
AM CHST SUNDAY... 
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 5 PM 
CHST SUNDAY...

* WHAT...For the Coastal Flood Warning, significant coastal flooding
  of 3 to 5 feet. For the High Surf Warning, dangerously large
  breaking waves of 17 to 23 feet. For the Coastal Flood Advisory, 
  minor coastal flooding of 1 to 2 feet expected. For the High Surf 
  Advisory, large breaking waves of 10 to 14 feet expected. For the 
  High Rip Current Risk, dangerous rip currents.

* WHERE...South, west and north facing reefs and shorelines of
  Tinian and Saipan.

* WHEN...For the Coastal Flood Warning, until 5 AM ChST Saturday.
  For the High Surf Warning, until 10 AM ChST Saturday. For the
  Coastal Flood Advisory, from 5 AM Saturday to 11 AM ChST Sunday.
  For the High Surf Advisory, from 10 AM Saturday to 5 PM ChST
  Sunday. For   the High Rip Current Risk, through Sunday afternoon.

* IMPACTS...Numerous roads may be closed. Low lying property 
  including homes, businesses, and some critical infrastructure will 
  be inundated. Some shoreline erosion will 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. Rip currents can sweep even the best swimmers away 
  from shore into deeper water.

* ADDITIONAL DETAILS...As Typhoon Sinlaku continues to move away, the
  primary swell and highest surf will be northwest. Seas will be 
  slow to subside over the next couple of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

GUZ001-MPZ001-172000-
/O.CON.PGUM.SU.W.0005.000000T0000Z-260418T0000Z/
/O.CON.PGUM.CF.Y.0002.000000T0000Z-260418T0700Z/
/O.CON.PGUM.SU.Y.0038.260418T0000Z-260419T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260419T0700Z/
Guam-Rota-
400 PM ChST Fri Apr 17 2026

...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 10 AM CHST SATURDAY... 
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 5 PM CHST 
SATURDAY... 
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY 
AFTERNOON... 
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 5 PM 
CHST SUNDAY...

* WHAT...For the High Surf Warning, dangerously large breaking waves
  of 16 to 20 feet. For the Coastal Flood Advisory, minor coastal 
  flooding of 1 to 2 feet. For the High Surf Advisory, large breaking
  waves of 10 to 14 feet expected. For the High Rip Current Risk, 
  dangerous rip currents.

* WHERE...South, west and north facing reefs and shorelines of
    Guam and Rota.

* WHEN...For the High Surf Warning, until 10 AM ChST Saturday.
  For the Coastal Flood Advisory, until 5 PM ChST Saturday. For the
  High Surf Advisory, from 10 AM Saturday to 5 PM ChST Sunday. For
  the High Rip Current Risk, through Sunday afternoon.

* IMPACTS...Flooding of lots, parks, and roads with only isolated 
  road closures expected. Breaking waves can sweep people off jetties
  and docks, and into dangerous seas. Life-threatening swimming 
  conditions and significant beach erosion can be expected. Rip 
  currents can sweep even the best swimmers away from shore into 
  deeper water.

* ADDITIONAL DETAILS...As TY Sinlaku continues to move away, the
  primary swell and highest surf will be northwest. Seas will be
  slow to subside over the next couple of days. Surf heights of 12 
  to 18 feet are expected for Guam and Rota.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

Kleeschulte

384 
WHMY40 PGUM 171803
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
403 AM ChST Sat Apr 18 2026

MPZ002-003-180815-
/O.CAN.PGUM.CF.W.0001.000000T0000Z-260417T1900Z/
/O.CON.PGUM.SU.W.0005.000000T0000Z-260418T0000Z/
/O.CON.PGUM.CF.Y.0002.260417T1900Z-260419T0100Z/
/O.CON.PGUM.SU.Y.0038.260418T0000Z-260419T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260419T0700Z/
Tinian-Saipan-
403 AM ChST Sat Apr 18 2026

...COASTAL FLOOD WARNING IS CANCELLED...
...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 10 AM CHST THIS
MORNING...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY
AFTERNOON...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 AM CHST
SUNDAY...
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING
TO 5 PM CHST SUNDAY...

* WHAT...For the High Surf Warning, dangerously
  large breaking waves of 12 to 17 feet. For the Coastal Flood
  Advisory, minor coastal flooding of 1 to 2 feet expected. For the
  High Surf Advisory, large breaking waves of 10 to 14 feet
  expected. For the High Rip Current Risk, dangerous rip currents.

* WHERE...South, west, and north facing reefs of Tinian and Saipan.

* WHEN...For the High Surf Warning, until 10 AM ChST this
  morning. For the Coastal Flood Advisory, until 11 AM ChST Sunday.
  For the High Surf Advisory, from 10 AM this morning to 5 PM ChST
  Sunday. For the High Rip Current Risk, through Sunday afternoon.

* IMPACTS...Flooding of lots, parks, and roads with only isolated
  road closures expected. Breaking waves can sweep people off
  jetties and docks, and into dangerous seas. Life-threatening
  swimming conditions and significant beach erosion can be
  expected. Rip currents can sweep even the best swimmers away from
  shore into deeper water.

* ADDITIONAL DETAILS...As Typhoon Sinlaku continues to move away,
  the primary swell and highest surf will be northwest. Seas will
  be slow to subside over the next couple of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

GUZ001-MPZ001-180815-
/O.CON.PGUM.SU.W.0005.000000T0000Z-260418T0000Z/
/O.CON.PGUM.CF.Y.0002.000000T0000Z-260418T0700Z/
/O.CON.PGUM.SU.Y.0038.260418T0000Z-260419T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260419T0700Z/
Guam-Rota-
403 AM ChST Sat Apr 18 2026

...HIGH SURF WARNING REMAINS IN EFFECT UNTIL 10 AM CHST THIS
MORNING...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 5 PM CHST THIS
AFTERNOON...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY
AFTERNOON...
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING
TO 5 PM CHST SUNDAY...

* WHAT...For the High Surf Warning, dangerously large breaking
  waves of 11 to 15 feet. For the Coastal Flood Advisory, minor
  coastal flooding of 1 to 2 feet. For the High Surf Advisory,
  large breaking waves of 10 to 14 feet expected. For the High Rip
  Current Risk, dangerous rip currents.

* WHERE...South, west and north facing reefs and shorelines of
  Guam and Rota.

* WHEN...For the High Surf Warning, until 10 AM ChST this morning. 
  For the Coastal Flood Advisory, until 5 PM ChST today. For the 
  High Surf Advisory, from 10 AM this morning to 5 PM ChST Sunday. 
  For the High Rip Current Risk, through Sunday afternoon.

* IMPACTS...Flooding of lots, parks, and roads with only isolated
  road closures expected. Breaking waves can sweep people off
  jetties and docks, and into dangerous seas. Life-threatening
  swimming conditions and significant beach erosion can be
  expected. Rip currents can sweep even the best swimmers away from
  shore into deeper water.

* ADDITIONAL DETAILS...As TY Sinlaku continues to move away, the
  primary swell and highest surf will be northwest. Seas will be
  slow to subside over the next couple of days. Surf heights of
  12 to 16 feet are expected for Guam and Rota.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

Williams

522 
WHMY40 PGUM 180645
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
445 PM ChST Sat Apr 18 2026

GUZ001-MPZ001-182200-
/O.EXP.PGUM.CF.Y.0002.000000T0000Z-260418T0700Z/
/O.CON.PGUM.SU.Y.0038.000000T0000Z-260419T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260419T0700Z/
Guam-Rota-
445 PM ChST Sat Apr 18 2026

...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 PM CHST SUNDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY
AFTERNOON...
...COASTAL FLOOD ADVISORY WILL EXPIRE AT 5 PM CHST THIS
AFTERNOON...

* WHAT...Large breaking waves of 9 to 14 feet and dangerous rip 
  currents.

* WHERE...South, west and north facing reefs of Guam and Rota.

* WHEN...Until 5 PM ChST Sunday.

* 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...As Typhoon Sinlaku continues to move away,
  the primary swell and highest surf will be northwest. Seas and
  surf will be slow to subside over the next couple of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.

Rip currents will be life threatening. 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.

&&

$$

MPZ002-003-182200-
/O.CON.PGUM.CF.Y.0002.000000T0000Z-260419T0100Z/
/O.CON.PGUM.SU.Y.0038.000000T0000Z-260419T0700Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260419T0700Z/
Tinian-Saipan-
445 PM ChST Sat Apr 18 2026

...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 AM CHST
SUNDAY...
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 PM CHST SUNDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH SUNDAY
AFTERNOON...

* WHAT...Large breaking waves of 10 to 14 feet and dangerous rip 
  currents. Minor coastal flooding of 1 to 2 feet expected.

* WHERE...South, west, and north facing reefs and shorelines of 
  Tinian and Saipan.

* WHEN...For the Coastal Flood Advisory, until 11 AM ChST Sunday.
  For the High Surf Advisory and High Rip Current Risk, until 5 PM
  ChST Sunday.

* IMPACTS...Flooding of lots, parks, and roads with only isolated
  road closures expected. Breaking waves can sweep people off
  jetties and docks, and into dangerous seas. Life-threatening
  swimming conditions and significant beach erosion can be
  expected. Rip currents can sweep even the best swimmers away
  from shore into deeper water.

* ADDITIONAL DETAILS...As Typhoon Sinlaku continues to move away,
  the primary swell and highest surf will be northwest. Seas and
  surf will be slow to subside over the next couple of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Rip currents will be life threatening. 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.

&&

$$

DeCou

052 
WHMY40 PGUM 180728 AAA
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message...UPDATED
National Weather Service Tiyan GU
528 PM ChST Sat Apr 18 2026

MPZ002-003-182100-
/O.EXT.PGUM.SU.Y.0038.000000T0000Z-260419T1900Z/
/O.EXT.PGUM.RP.S.0011.000000T0000Z-260419T1900Z/
/O.CON.PGUM.CF.Y.0002.000000T0000Z-260419T0100Z/
Tinian-Saipan-
528 PM ChST Sat Apr 18 2026

Updated expiration times.

...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 5 AM CHST MONDAY...
...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH LATE SUNDAY
NIGHT...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 AM CHST
SUNDAY...

* WHAT...Large breaking waves of 10 to 14 feet and dangerous rip
  currents. Minor coastal flooding of 1 to 2 feet expected.

* WHERE...South, west, and north facing reefs and shorelines of 
  Tinian and Saipan.

* WHEN...For the Coastal Flood Advisory, until 11 AM ChST Sunday.
  For the High Surf Advisory and High Rip Current Risk, until 5 AM
  ChST Monday.

* IMPACTS...Flooding of lots, parks, and roads with only isolated
  road closures expected. 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...As Typhoon Sinlaku continues to move away,
  the primary swell and highest surf will be northwest. Seas and
  surf will be slow to subside over the next couple of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.

Rip currents will be life threatening. 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.

&&

$$

GUZ001-MPZ001-182100-
/O.EXT.PGUM.SU.Y.0038.000000T0000Z-260419T1900Z/
/O.EXT.PGUM.RP.S.0011.000000T0000Z-260419T1900Z/
Guam-Rota-
528 PM ChST Sat Apr 18 2026

Updated expiration times.

...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 5 AM CHST MONDAY...
...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH LATE SUNDAY
NIGHT...

* WHAT...Large breaking waves of 9 to 14 feet and dangerous rip
  currents.

* WHERE...South, west and north facing reefs of Guam and Rota.

* WHEN...Until 5 AM ChST Monday.

* 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...As Typhoon Sinlaku continues to move away,
  the primary swell and highest surf will be northwest. Seas and
  surf will be slow to subside over the next couple of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.

Rip currents will be life threatening. 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.

&&

$$

IC

005 
WHMY40 PGUM 181758
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
358 AM ChST Sun Apr 19 2026

MPZ002-003-190800-
/O.CON.PGUM.CF.Y.0002.000000T0000Z-260419T0100Z/
/O.CON.PGUM.SU.Y.0038.000000T0000Z-260419T1900Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260419T1900Z/
Tinian-Saipan-
358 AM ChST Sun Apr 19 2026

...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 AM CHST THIS
MORNING...
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 AM CHST MONDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE TONIGHT...

* WHAT...Large breaking waves of 10 to 14 feet and dangerous rip
    currents. Minor coastal flooding of 1 to 2 feet expected.

* WHERE...South, west, and north facing reefs and shorelines of
  Tinian and Saipan.

* WHEN...For the Coastal Flood Advisory, until 11 AM ChST today.
  For the High Surf Advisory and High Rip Current Risk, until 5 AM
  ChST Monday.

* IMPACTS...Flooding of lots, parks, and roads with only isolated
  road closures expected. 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...As Tropical Storm Sinlaku continues to move
  away, the primary swell and highest surf will be northwest. Seas 
  and surf will be slow to subside over the next couple of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.

Rip currents will be life threatening. 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.

&&

$$

GUZ001-MPZ001-190800-
/O.CON.PGUM.SU.Y.0038.000000T0000Z-260419T1900Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260419T1900Z/
Guam-Rota-
358 AM ChST Sun Apr 19 2026

...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 AM CHST MONDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE TONIGHT...

* WHAT...Large breaking waves of 9 to 14 feet and dangerous rip
  currents.

* WHERE...South, west and north facing reefs of Guam and Rota.

* WHEN...Until 5 AM   ChST Monday.

* 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...As Tropical Storm Sinlaku continues to move
  away, the primary swell and highest surf will be northwest. Seas 
  and surf will be slow to subside over the next couple of days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.

Rip currents will be life threatening. 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.

&&

$$

Williams

279 
WHMY40 PGUM 190128
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
1128 AM ChST Sun Apr 19 2026

MPZ002-003-191530-
/O.EXP.PGUM.CF.Y.0002.000000T0000Z-260419T0100Z/
/O.CON.PGUM.SU.Y.0038.000000T0000Z-260419T1900Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260419T1900Z/
Tinian-Saipan-
1128 AM ChST Sun Apr 19 2026

...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 AM CHST MONDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE TONIGHT...
...COASTAL FLOOD ADVISORY HAS EXPIRED...

* WHAT...For the High Surf Advisory, large breaking waves of 10 to
  14 feet and dangerous rip currents.

* WHERE...South, west, and north facing reefs and shorelines of
  Tinian and Saipan.

* WHEN...For the High Surf Advisory and High Rip Current Risk,
  until 5 AM ChST Monday.

* 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...As Tropical Storm Sinlaku continues to move 
  away, the primary swell and highest surf will be northwest. Seas
  and surf will be slow to subside over the next couple of days. 
  The coastal flood threat has fallen below moderate levels, though 
  nuisance inundation will still be possible through the rest of 
  today.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.

Rip currents will be life threatening. 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.

&&

$$

GUZ001-MPZ001-191530-
/O.CON.PGUM.SU.Y.0038.000000T0000Z-260419T1900Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260419T1900Z/
Guam-Rota-
1128 AM ChST Sun Apr 19 2026

...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 AM CHST MONDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE TONIGHT...

* WHAT...Large breaking waves of 9 to 14 feet and dangerous rip
  currents.

* WHERE...South, west, and north facing reefs of Guam and Rota.

* WHEN...Until 5 AM ChST Monday.

* 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...As Tropical Storm Sinlaku continues to
  move away, the primary swell and highest surf will be northwest.
  Seas and surf will be slow to subside over the next couple of
  days.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.

Rip currents will be life threatening. 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.

&&

$$

806 
WHMY40 PGUM 190609
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
409 PM ChST Sun Apr 19 2026

GUZ001-MPZ001>003-191900-
/O.CON.PGUM.SU.Y.0038.000000T0000Z-260419T1900Z/
/O.CON.PGUM.RP.S.0011.000000T0000Z-260419T1900Z/
Guam-Rota-Tinian-Saipan-
409 PM ChST Sun Apr 19 2026

...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 AM CHST MONDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE TONIGHT...

* WHAT...For the High Surf Advisory, large breaking waves of 7 to 10
  feet in the surf zone. For the High Rip Current Risk, dangerous 
  rip currents.

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

* WHEN...For the High Surf Advisory and High Rip Current Risk, until
  5 AM ChST Monday.

* 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...As Sinlaku continues to move away to the
  north-northeast, the primary swell has shifted to the north and
  decreased, allowing surf to fall below hazardous levels along west
  and south facing reefs while remaining hazardous along north 
  facing reefs overnight. Surf is likely to further decrease along 
  all reefs the next several days, allowing the rip current risk to 
  drop as well.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

Montvila

790 
WHMY40 PGUM 191839
CFWGUM

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Tiyan GU
439 AM ChST Mon Apr 20 2026

GUZ001-MPZ001>003-191945-
/O.EXP.PGUM.SU.Y.0038.000000T0000Z-260419T1900Z/
/O.EXP.PGUM.RP.S.0011.000000T0000Z-260419T1900Z/
Guam-Rota-Tinian-Saipan-
439 AM ChST Mon Apr 20 2026

...HIGH SURF ADVISORY WILL EXPIRE AT 5 AM CHST EARLY THIS MORNING...
...HIGH RIP CURRENT RISK WILL END EARLY THIS MORNING...

Buoy and satellite altimetry data have shown a slow but steady 
decrease in the primary northerly swell overnight. This supports 
surf along north facing reefs to dropping below the 9 foot threshold 
for hazardous surf and a high risk of rip currents this morning. 
Model guidance shows surf potentially dropping additonal foot or two 
over the next few days. 

$$

Schank