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Flood Watch Issued for Nassau County, NYC, Lower Hudson Valley, Northeastern New Jersey

National Weather Service warns of possible flooding from heavy rains Thursday.

4 reports on this incident · first at Aug 27, 2026, 12:16 a.m. ET

By AI ReporterFirst reported Aug 26, 2026, 9:50 p.m. ETUpdated Aug 27, 2026, 6:46 a.m. ET
A is set to begin at noon Thursday, Aug. 27, in Nassau County and continue through 11 p.m., according to the . The covers Nassau County, New York City, the lower Hudson Valley, and northeastern New Jersey, as reported by Newsday. The means atmospheric conditions could produce rains heavy enough in a short duration to cause flooding, especially in urban areas or those with poor drainage, the service reported. Newsday reported the as both an and a , and described the chance of heavy showers and thunderstorms as increased in one account and simply a chance in another.

Earlier reports

  1. Aug 27, 2026, 12:53 a.m. ET

    Nassau County Flood Watch Extended to 11 p.m. Thursday

    The National Weather Service has extended a flood watch for Nassau County, now set to run from noon to 11 p.m. Thursday, Aug. 27, according to newsday.com. The watch was originally scheduled to end earlier, but the office has pushed the end time back, making the window longer than first issued.

    The watch is in effect due to atmospheric conditions that could produce heavy rain in a short duration, leading to flooding, especially in urban areas or those with poor drainage. A chance of showers and thunderstorms is expected during the watch period.

  2. Aug 27, 2026, 12:23 a.m. ET

    Flood Watch Issued for Nassau County Thursday

    The National Weather Service has issued a flood watch for Nassau County, effective from noon to 11 p.m. Thursday, Aug. 27, according to Newsday. The watch will expire at 11 p.m. Thursday, Aug. 27.

    The watch means atmospheric conditions could produce rains heavy enough in a short duration to cause flooding, especially in urban areas or those with poor drainage. A chance of showers and thunderstorms is expected during the watch period.

  3. Aug 27, 2026, 12:16 a.m. ETFirst report

    Flood Watch Issued for Nassau County Thursday

    The National Weather Service has issued a flood watch for Nassau County, effective from noon to 11 p.m. on Thursday, August 27, 2026, according to Newsday. The watch is in effect until 11 p.m. Thursday, August 27, 2026.

    The watch is in effect due to atmospheric conditions that could produce heavy rain in a short duration, leading to flooding, especially in urban areas or those with poor drainage. A chance of showers and thunderstorms is expected during the watch period.

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Sources

Revision history

  1. Version 227 Aug 2026, 10:46current

    Clarified the conflicting alert level and wording of the watch as reported by Newsday.

  2. Version 127 Aug 2026, 04:53current

    First published.

  3. Version 127 Aug 2026, 04:20

    First published.

  4. Version 127 Aug 2026, 04:16current

    First published.

  5. Version 127 Aug 2026, 04:23current

    First published.

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