Supermarket operator Great Atlantic & Pacific Tea Co. revealed that more than 4,600 workers at 45 Long Island supermarkets are at risk of being laid off by Thanksgiving as part of its Chapter 11 bankruptcy proceeding.

About 13,000 employees at Long Island, New York City and Hudson Valley stores could be affected by the potential layoffs, according to a state filing posted Monday. The layoffs are scheduled to take place between Nov. 12 and Nov. 26.

The Long Island locations with the biggest number of potential affected employees are all Waldbaum's stores, including 227 employees at 1960 Deer Park Ave. in Deer Park, 210 workers on 211 Middle Country Rd. in Selden, and 172 on 777 Pulaski Rd. in Greenlawn.

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On top of the scheduled November layoffs, A&P announced separately last month that 472 workers could lose their jobs between Oct. 19 and Nov. 1 when it closes five supermarkets on Long Island: Pathmark stores in Baldwin and Centereach, and Waldbaum's in Carle Place, Oceanside and Riverhead.

Under the state Worker Adjustment and Retraining Notification Act, companies with at least 50 full-time employees must file a 90-day notice of a planned closing or mass layoff.

A representative for the company declined to comment. Officials of the United Food and Commercial Workers International Union did not comment about the potential layoffs.

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It's uncertain how many workers will lose their jobs. Stores that are bought may rehire workers now employed by A&P.

Much will hinge on whether A&P can sell 153 stores, including 35 on Long Island, as well as get court approval to sell 18 stores for about $600 million to Acme Markets Inc., Stop & Shop Supermarket Co. and Key Food Stores Co-operative Inc., all of which have already submitted separate bids for stores. Each bid remains subject to higher offers.

Stop & Shop said it agreed to acquire 25 A&P stores in New York and New Jersey for $146 million. The Long Island stores on the list include Waldbaum's locations in East Hampton, Southampton, Baldwin, Massapequa, Long Beach and Huntington, and Pathmarks in Greenvale, Seaford and Franklin Square.

Key Food initially agreed to take over 19 stores but reduced its offers to 17 stores. Key Food plans to take over two Waldbaum's locations on Long Island, in Albertson and Glen Head.

Acme Markets agreed to purchase 76 stores in New York -- none on Long Island -- New Jersey, Connecticut, Pennsylvania and Delaware.

The filing by A&P listed 4,732 potential layoffs on Long Island, but the detailed accounting by store added up to 4,632. A&P said it couldn't explain the discrepancy by deadline.

Montvale, New Jersey-based A&P, founded in 1859, filed for Chapter 11 bankruptcy last month. The filing allows the company to continue operating while being protected from creditors. A&P previously filed for bankruptcy in 2010.