693 WHHW40 PHFO 190126 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 326 PM HST Mon May 18 2026 ...MINOR COASTAL FLOODING ON ALL ISLANDS DURING HIGH TIDES TODAY... .Peak monthly high tides combined with water levels that will be running higher than predicted will lead to minor flooding along the shoreline and in low-lying coastal areas. Coastal flooding is possible around the daily peak tides, which will occur during the late afternoon hours. HIZ001-003-006-007-009-016>018-023-026-029>035-037>054-190600- /O.CON.PHFO.CF.S.0004.000000T0000Z-260519T0600Z/ Niihau-Kauai Southwest-Waianae Coast-Oahu North Shore-Olomana- Kahoolawe-Maui Windward West-Maui Leeward West-Kona-Kohala- Kauai North-Kauai East-Kauai South-East Honolulu-Honolulu Metro- Ewa Plain-Koolau Windward-Molokai Windward-Molokai Southeast- Molokai North-Molokai West-Molokai Leeward South-Lanai Windward- Lanai Leeward-Lanai South-Maui Central Valley North- Maui Central Valley South-Windward Haleakala-Kipahulu- South Maui/Upcountry-South Haleakala-Big Island South- Big Island Southeast-Big Island East-Big Island North- 326 PM HST Mon May 18 2026 ...COASTAL FLOOD STATEMENT REMAINS IN EFFECT UNTIL 8 PM HST THIS EVENING... * WHAT...Isolated minor coastal flooding expected. * WHERE...Vulnerable low-lying coastal roadways, docks, boat ramps and other coastal infrastructure of all Hawaiian Islands. * WHEN...During the afternoon hours today. * IMPACTS...Flooding of beaches that are normally dry, minor coastal erosion, and saltwater inundation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid driving through flooded roadways. If you are forced to drive through salt water, be sure to rinse your vehicle with fresh water. Move electronics, vehicles or other valuables to higher ground. Monitor vessels to ensure mooring lines don't get too tight and watch out for overwash around boat ramps. Secure canoes or other watercraft stowed on beaches. && Submit your coastal flooding photos to the University of Hawaii Sea Grant College Program's Hawaii and Pacific Islands King Tides Project at: PacificIslandsKingTides.org $$  227 WHUS42 KCHS 190141 CFWCHS Coastal Hazard Message National Weather Service Charleston SC 941 PM EDT Mon May 18 2026 SCZ149-150-190400- /O.CON.KCHS.CF.Y.0012.000000T0000Z-260519T0400Z/ Coastal Colleton-Charleston- 941 PM EDT Mon May 18 2026 ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... * WHAT...Up to one half foot of inundation above ground level along shorelines and tidal waterways (7.1 to 7.3 feet Mean Lower Low Water at Charleston). * WHERE...Coastal Colleton and Charleston Counties. * WHEN...Until midnight EDT tonight. * IMPACTS...This could result in some roads becoming impassable. * ADDITIONAL DETAILS...High tide will occur around 10:19 PM today at Charleston. Saltwater inundation will be possible 1 to 2 hours before and after high tide. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Visit water.weather.gov for additional water level and flood impact information. && Time of high total tides are approximate to the nearest hour. Charleston Harbor SC MLLW Categories - Minor 7.0 ft, Moderate 7.5 ft, Major 8.0 ft MHHW Categories - Minor 1.2 ft, Moderate 1.7 ft, Major 2.2 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/10 PM 7.2 1.4 0.6 N/A Minor 19/11 AM 5.3 -0.5 0.3 N/A None 19/11 PM 6.8 1.0 0.4 N/A None 20/12 PM 5.2 -0.6 0.3 N/A None 21/12 AM 6.5 0.7 0.4 N/A None 21/01 PM 5.3 -0.5 0.4 N/A None && $$