673 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  874 WHPQ42 PGUM 171831 CFWPQ2 URGENT - IMMEDIATE BROADCAST REQUESTED Coastal Hazard Message National Weather Service Tiyan GU 431 AM ChST Sat Apr 18 2026 FMZ037-180700- /O.CON.PGUM.SU.Y.0036.000000T0000Z-260418T0700Z/ /O.CON.PGUM.CF.S.0004.000000T0000Z-260418T0700Z/ Yap- 431 AM ChST Sat Apr 18 2026 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 5 PM CHST THIS AFTERNOON... ...COASTAL FLOOD STATEMENT REMAINS IN EFFECT THROUGH THIS AFTERNOON... * WHAT...Large breaking waves of 9 to 11 feet. Minor coastal flooding possible. * WHERE...North and east facing reefs of Yap. * WHEN...Until 5 PM ChST this afternoon. * IMPACTS...Some water on low lying roads and property. Dangerous swimming and surfing conditions and localized beach erosion. * ADDITIONAL DETAILS...Large northeast swell from Typhoon Sinlaku will bring hazardous surf along north and east facing reefs through at least this afternoon. Hazardous surf, combined with the higher high tides with the new moon cycle, may produce minor coastal inundation along northern and eastern shorelines at times of high tide. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. && $$ Williams  757 WHUS41 KOKX 171831 CFWOKX Coastal Hazard Message National Weather Service New York NY 231 PM EDT Fri Apr 17 2026 CTZ009-NYZ071-180500- /O.NEW.KOKX.CF.S.0007.260418T0300Z-260418T0500Z/ Southern Fairfield-Southern Westchester- 231 PM EDT Fri Apr 17 2026 ...COASTAL FLOOD STATEMENT IN EFFECT FROM 11 PM THIS EVENING TO 1 AM EDT SATURDAY... * WHAT...Up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...In Connecticut, Southern Fairfield County. In New York, Southern Westchester County. * WHEN...From 11 PM this evening to 1 AM EDT Saturday. * IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline. Some roads and low lying properties including parking lots, parks, lawns, and homes and businesses with basements near the waterfront may experience minor flooding. * ADDITIONAL DETAILS...There is the potential for another round of minor coastal flooding during Saturday night's high tide, additional statements or an advisory may be issued at a future time. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not drive through flooded roadways. && $$ NJZ006-106-108-NYZ074-180200- /O.NEW.KOKX.CF.S.0006.260417T2300Z-260418T0200Z/ Hudson-Eastern Essex-Eastern Union-Richmond (Staten Island)- 231 PM EDT Fri Apr 17 2026 ...COASTAL FLOOD STATEMENT IN EFFECT FROM 7 PM TO 10 PM EDT THIS EVENING... * WHAT...Up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...In New Jersey, Hudson, Eastern Essex and Eastern Union Counties. In New York, Richmond (Staten Island) County. * WHEN...From 7 PM to 10 PM EDT this evening. * IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline. * ADDITIONAL DETAILS...There is the potential for another round of minor coastal flooding during Saturday evening's high tide, additional statements or an advisory may be issued at a future time. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not drive through flooded roadways. && $$ NYZ178-179-180200- /O.NEW.KOKX.CF.S.0006.260417T2300Z-260418T0200Z/ Southern Queens-Southern Nassau- 231 PM EDT Fri Apr 17 2026 ...COASTAL FLOOD STATEMENT IN EFFECT FROM 7 PM TO 10 PM EDT THIS EVENING... * WHAT...Up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Southern Queens and Southern Nassau Counties. * WHEN...From 7 PM to 10 PM EDT this evening. * IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline. Some roads and low lying properties including parking lots, parks, lawns, and homes and businesses with basements near the waterfront may experience minor flooding. * ADDITIONAL DETAILS...There is the potential for another round of minor coastal flooding during Saturday evening's high tide, additional statements or an advisory may be issued at a future time. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not drive through flooded roadways. && $$ Be sure to use the MyCoast app to relay photos and reports of coastal flooding and beach erosion. For more information from the National Weather Service visit https://weather.gov/nyc