Coastal Flood Warning Issued for Southwest Suffolk and Southern Nassau Counties
This alert is no longer in effect.
NOAA issued it on April 6, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
A Coastal Flood Warning is in effect for parts of Long Island from Sunday night through early Monday, with up to 3 feet of inundation and significant shoreline impacts expected.
Read this weather record in 30 seconds
- Record type
- Coastal Flood Warning
- Affected area
- Southwest Suffolk and Southern Nassau, New York
- Issued
- April 6, 2026
- Issuing authority
- NWS Upton NY
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Southwest Suffolk and Southern Nassau, New York.
Alert Details
The National Weather Service in Upton, NY, has issued a Coastal Flood Warning for Southwest Suffolk and Southern Nassau Counties. This alert indicates a high likelihood of significant coastal flooding during the specified time window.
Affected Areas
The warning specifically covers Southwest Suffolk and Southern Nassau Counties in New York. Impacted areas include low-lying regions near the waterfront, shoreline, tidal rivers, and bays.
What You Should Do
Residents are advised to take immediate actions to protect flood-prone property. If travel is necessary, do not drive around barricades or attempt to drive through water of unknown depth. Vehicles should be moved from vulnerable areas near the waterfront to prevent damage.
Expected Conditions
- Inundation: 1 1/2 to 2 1/2 feet, with local amounts up to 3 feet, of water above ground level in vulnerable areas.
- Flooding Severity: Widespread moderate to localized major flooding is expected. This will likely result in numerous road closures and flooding of homes, businesses, parking lots, and parks.
- Shoreline Impacts: Breaking surf of 5 to 10 feet will cause widespread beach erosion and flooding. Dune erosion is likely, with potential washovers where dunes are compromised.
- Additional Hazards: Ice cover in bays and harbors may exacerbate flooding and cause damage to north to northeast facing shoreline structures.
Timeline
The Coastal Flood Warning is effective from 10:00 PM Sunday, February 22, until 4:00 AM EST Monday, February 23. Additional minor to moderate flooding may occur during the Monday afternoon high tide cycle.
Original source: NOAA Official Notice ↗
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