Active Weather Alerts
Coastal Flood Advisory
Issued: 8:36 PM May. 21, 2025 – National Weather Service
...COASTAL FLOOD ADVISORY IN EFFECT FROM 2 PM TO 11 PM EDT THURSDAY... * WHAT...Up to 1 1/2 half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. Up to 1/2 ft of inundation above ground level possible for vulnerable areas near the waterfront and shoreline of southern Nassau with the early Thursday morning high tide. * WHERE...Northeast Suffolk, Southwest Suffolk, Southeast Suffolk and Southern Nassau Counties. * WHEN...From 2 PM to 11 PM EDT Thursday. * COASTAL FLOOD IMPACTS...Minor flooding in the most vulnerable locations near the waterfront and shoreline. Expect up to 1 1/2 feet of inundation above ground level in low lying, vulnerable areas. Some roads and low lying property including parking lots, parks, lawns and homes/businesses with basements near the waterfront will experience shallow flooding. * SHORELINE IMPACTS...Along the north shore of the south fork of Long Island, breaking waves of 1 to 3 ft may cause dune erosion and localized washovers, as well as enhance splashover and flooding onto shoreline roads and properties. Along the ocean front and Orient Point, breaking waves of 4 to 6 ft on an east to west sweep will result in beach erosion and beach flooding during the times of high tide. Localized dune erosion is possible. * ADDITIONAL DETAILS...Highest confidence in widespread minor coastal flooding is along the Great South bayfront of Nassau County, and along the north shore of the south fork of Long Island, Orient Point and tidally affected portions of the Peconic River. Coastal flooding is likely to be more isolated for the central and eastern Great South Bay, Moriches Bay and Shinnecock Bay communities, but tidal piling presents potential for more widespread minor coastal flooding. 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. && Time of high total tides are approximate to the nearest hour. PECONIC RIVER AT RIVERHEAD NY MLLW CATEGORIES - MINOR 5.7 FT, MODERATE 6.4 FT, MAJOR 7.2 FT MHHW CATEGORIES - MINOR 2.3 FT, MODERATE 3.0 FT, MAJOR 3.8 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/08 PM 4.2/ 4.7 0.8/ 1.3 1.0/ 1.5 0 NONE 22/09 AM 4.4/ 4.9 1.0/ 1.5 1.8/ 2.2 1-2 NONE 22/08 PM 5.7/ 6.2 2.3/ 2.8 2.5/ 3.0 1-2 MINOR 23/09 AM 3.0/ 3.5 -0.5/ 0.0 0.4/ 0.9 0-1 NONE 23/09 PM 4.0/ 4.5 0.7/ 1.1 0.6/ 1.1 1 NONE 24/10 AM 2.7/ 3.2 -0.7/-0.2 0.2/ 0.7 2 NONE ORIENT HARBOR AT ORIENT POINT NY MLLW CATEGORIES - MINOR 4.8 FT, MODERATE 5.8 FT, MAJOR 6.8 FT MHHW CATEGORIES - MINOR 1.8 FT, MODERATE 2.8 FT, MAJOR 3.8 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/06 PM 3.2/ 3.7 0.2/ 0.8 0.4/ 0.9 1-2 NONE 22/07 AM 3.4/ 3.9 0.4/ 0.9 0.9/ 1.4 2 NONE 22/07 PM 5.0/ 5.5 2.0/ 2.5 1.8/ 2.2 2-3 MINOR 23/07 AM 2.2/ 2.7 -0.8/-0.2 -0.2/ 0.2 1 NONE 23/08 PM 3.5/ 4.0 0.5/ 1.0 0.1/ 0.6 1 NONE 24/08 AM 2.2/ 2.7 -0.9/-0.4 -0.3/ 0.2 2 NONE FLAX POND AT OLD FIELD NY MLLW CATEGORIES - MINOR 9.2 FT, MODERATE 10.2 FT, MAJOR 12.2 FT MHHW CATEGORIES - MINOR 1.9 FT, MODERATE 2.9 FT, MAJOR 4.9 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/07 PM 8.0/ 8.5 0.7/ 1.1 0.9/ 1.4 1-2 NONE 22/07 AM 8.2/ 8.7 0.9/ 1.4 1.5/ 2.0 2 NONE 22/07 PM 9.5/10.0 2.2/ 2.7 2.3/ 2.8 2 MINOR 23/08 AM 6.8/ 7.3 -0.6/-0.1 0.0/ 0.5 1 NONE 23/09 PM 8.1/ 8.6 0.8/ 1.3 0.2/ 0.7 1 NONE 24/09 AM 7.0/ 7.5 -0.3/ 0.2 0.0/ 0.5 1-2 NONE GREAT SOUTH BAY AT LINDENHURST NY MLLW CATEGORIES - MINOR 3.1 FT, MODERATE 3.6 FT, MAJOR 4.1 FT MHHW CATEGORIES - MINOR 1.5 FT, MODERATE 2.0 FT, MAJOR 2.5 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/05 PM 2.3/ 2.8 0.8/ 1.3 1.2/ 1.7 0 NONE 22/06 AM 2.7/ 3.2 1.2/ 1.7 1.5/ 2.0 0 NONE 22/06 PM 2.8/ 3.4 1.3/ 1.8 1.6/ 2.0 0 MINOR 23/07 AM 2.2/ 2.7 0.7/ 1.1 1.0/ 1.5 0-1 NONE 23/08 PM 2.2/ 2.7 0.7/ 1.1 0.8/ 1.3 1 NONE 24/08 AM 1.8/ 2.2 0.2/ 0.7 0.5/ 1.0 1-2 NONE GREAT SOUTH BAY AT WEST SAYVILLE NY MLLW CATEGORIES - MINOR 3.1 FT, MODERATE 3.6 FT, MAJOR 4.1 FT MHHW CATEGORIES - MINOR 1.7 FT, MODERATE 2.2 FT, MAJOR 2.7 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/07 PM 1.9/ 2.3 0.5/ 1.0 0.9/ 1.4 1-2 NONE 22/07 AM 2.2/ 2.7 0.8/ 1.3 1.2/ 1.7 2 NONE 22/07 PM 2.7/ 3.2 1.3/ 1.8 1.7/ 2.2 2 NONE 23/07 AM 1.9/ 2.3 0.5/ 1.0 1.0/ 1.5 1 NONE 23/08 PM 1.9/ 2.3 0.5/ 1.0 0.8/ 1.3 1 NONE 24/09 AM 1.4/ 1.9 0.0/ 0.5 0.5/ 1.0 1-2 NONE GREAT SOUTH BAY AT WATCH HILL/FIRE ISLAND NY MLLW CATEGORIES - MINOR 3.2 FT, MODERATE 3.7 FT, MAJOR 4.2 FT MHHW CATEGORIES - MINOR 1.7 FT, MODERATE 2.2 FT, MAJOR 2.7 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/07 PM 1.9/ 2.3 0.4/ 0.9 0.7/ 1.1 1-2 NONE 22/07 AM 2.2/ 2.7 0.8/ 1.3 1.1/ 1.6 2 NONE 22/07 PM 2.8/ 3.4 1.4/ 1.9 1.6/ 2.0 2 NONE 23/08 AM 1.8/ 2.2 0.2/ 0.8 0.6/ 1.1 1 NONE 23/08 PM 1.9/ 2.3 0.4/ 0.9 0.5/ 1.0 1 NONE 24/08 AM 1.3/ 1.8 -0.2/ 0.2 0.2/ 0.7 1-2 NONE MORICHES BAY AT EAST MORICHES NY MLLW CATEGORIES - MINOR 4.3 FT, MODERATE 5.3 FT, MAJOR 6.3 FT MHHW CATEGORIES - MINOR 1.9 FT, MODERATE 2.9 FT, MAJOR 3.9 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/05 PM 2.7/ 3.2 0.4/ 0.9 0.8/ 1.3 0 NONE 22/05 AM 3.2/ 3.7 0.8/ 1.3 1.2/ 1.7 0 NONE 22/05 PM 3.7/ 4.2 1.4/ 1.9 1.7/ 2.2 0 NONE 23/05 AM 2.5/ 3.0 0.1/ 0.6 0.6/ 1.1 0 NONE 23/07 PM 2.7/ 3.2 0.2/ 0.8 0.2/ 0.8 1 NONE 24/07 AM 2.1/ 2.6 -0.3/ 0.2 0.1/ 0.6 1-2 NONE SHINNECOCK BAY AT PONQUOQUE NY MLLW CATEGORIES - MINOR 4.9 FT, MODERATE 5.9 FT, MAJOR 6.9 FT MHHW CATEGORIES - MINOR 1.7 FT, MODERATE 2.7 FT, MAJOR 3.7 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/03 PM 3.9/ 4.4 0.7/ 1.1 1.0/ 1.5 1 NONE 22/04 AM 4.0/ 4.5 0.9/ 1.4 1.2/ 1.7 2 NONE 22/04 PM 4.7/ 5.2 1.6/ 2.0 1.6/ 2.0 2 MINOR 23/04 AM 3.6/ 4.1 0.4/ 0.9 0.8/ 1.3 1 NONE 23/05 PM 3.9/ 4.4 0.7/ 1.1 0.4/ 0.9 1 NONE 24/06 AM 3.1/ 3.6 -0.2/ 0.3 0.2/ 0.7 2 NONE FORT POND BAY AT MONTAUK NY MLLW CATEGORIES - MINOR 4.1 FT, MODERATE 4.9 FT, MAJOR 6.6 FT MHHW CATEGORIES - MINOR 1.6 FT, MODERATE 2.4 FT, MAJOR 4.1 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/05 PM 3.0/ 3.5 0.5/ 1.0 0.7/ 1.1 2-3 NONE 22/05 AM 3.0/ 3.5 0.5/ 1.0 0.9/ 1.4 2-4 NONE 22/05 PM 4.6/ 5.1 2.1/ 2.6 2.0/ 2.5 3-5 MINOR 23/05 AM 2.2/ 2.7 -0.2/ 0.2 0.2/ 0.8 2-3 NONE 23/07 PM 3.2/ 3.7 0.8/ 1.3 0.2/ 0.8 1 NONE 24/07 AM 2.2/ 2.7 -0.2/ 0.2 0.1/ 0.6 2 NONE EAST ROCKAWAY INLET AT ATLANTIC BEACH NY MLLW CATEGORIES - MINOR 6.2 FT, MODERATE 7.2 FT, MAJOR 8.2 FT MHHW CATEGORIES - MINOR 1.3 FT, MODERATE 2.3 FT, MAJOR 3.3 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/03 PM 5.2/ 5.7 0.4/ 0.9 0.8/ 1.3 2-3 NONE 22/04 AM 5.7/ 6.2 0.9/ 1.4 1.4/ 1.9 3-4 MINOR 22/04 PM 6.2/ 6.8 1.4/ 1.9 1.4/ 1.9 3-4 MINOR 23/04 AM 5.0/ 5.5 0.1/ 0.6 0.7/ 1.1 2-3 NONE 23/05 PM 5.5/ 6.0 0.6/ 1.1 0.2/ 0.7 1 NONE 24/06 AM 4.6/ 5.1 -0.3/ 0.2 0.1/ 0.6 1 NONE REYNOLDS CHANNEL AT POINT LOOKOUT NY MLLW CATEGORIES - MINOR 6.0 FT, MODERATE 7.0 FT, MAJOR 8.0 FT MHHW CATEGORIES - MINOR 1.3 FT, MODERATE 2.3 FT, MAJOR 3.3 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/04 PM 5.2/ 5.7 0.6/ 1.1 1.0/ 1.5 2-3 NONE 22/04 AM 5.5/ 6.0 0.8/ 1.3 1.3/ 1.8 3-5 MINOR 22/04 PM 6.1/ 6.6 1.4/ 1.9 1.4/ 1.9 3-5 MINOR 23/05 AM 5.0/ 5.5 0.2/ 0.8 0.8/ 1.3 2-3 NONE 23/05 PM 5.4/ 5.9 0.7/ 1.1 0.4/ 0.9 1 NONE 24/06 AM 4.4/ 4.9 -0.3/ 0.2 0.2/ 0.7 2 NONE HUDSON BAY AT FREEPORT NY MLLW CATEGORIES - MINOR 6.0 FT, MODERATE 6.5 FT, MAJOR 7.2 FT MHHW CATEGORIES - MINOR 1.5 FT, MODERATE 2.0 FT, MAJOR 2.7 FT TOTAL TOTAL DEPARTURE DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD FT MLLW FT MHHW FT FT IMPACT -------- --------- --------- --------- ------- -------- 21/04 PM 5.2/ 5.7 0.7/ 1.1 2.2/ 2.7 0 NONE 22/04 AM 5.5/ 6.0 1.0/ 1.5 2.3/ 2.8 0 MINOR 22/05 PM 6.1/ 6.6 1.6/ 2.0 2.7/ 3.2 0 MINOR 23/05 AM 5.1/ 5.6 0.6/ 1.1 2.0/ 2.5 0 NONE 23/05 PM 5.2/ 5.7 0.8/ 1.3 1.9/ 2.3 1 NONE 24/06 AM 4.6/ 5.1 0.1/ 0.6 1.4/ 1.9 1-2 NONE &&
Small Craft Advisory
Issued: 7:35 PM May. 21, 2025 – National Weather Service
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM EDT THURSDAY... * WHAT...East winds 15 to 25 kt with gusts up to 30 kt. * WHERE...Long Island Sound west of Port Jefferson and New Haven, New York Harbor, and South Shore Bays from Jones Inlet through Shinnecock Bay. * WHEN...Until 6 PM EDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. &&
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