Predictions for a massive winter storm in the Northeast have prompted banks in the region to close branches and delay earnings calls.

The National Weather Service on Monday issued a blizzard warning for the area, describing "crippling and potentially historic" conditions, including more than two feet of snow and wind gusts of up to 70 miles an hour.

"This will likely be one of the largest blizzards in the history of New York City," Mayor Bill de Blasio said in a press conference Monday afternoon.  "I'm asking everyone to understand that, and to prepare the accordingly. This is not going to be like other snowstorms."

JPMorgan Chase closed all of its retail branches in New York, New Jersey and Connecticut at 3:00 p.m., a company spokeswoman said. The branches be closed Tuesday, with the exception of about 50 branches in Syracuse, Rochester and Duchess County.

Citigroup also closed its Tri-state and Boston branches at 3:00 p.m. The branches will also be closed Tuesday, and the company has also increased staff at its call centers to handle added volume.

"We are closely and continuously monitoring conditions and will adjust operations accordingly," a company spokesman wrote in an email.

Smaller regional banks are also taking precautions ahead of the storm. Popular Community Bank said in a press release that it closed its New York and New Jersey branches at 2:00 p.m. Monday. Branches are set to stay closed Tuesday.

Some banks, including New York Community Bancorp in Westbury and Washington Trust Bancorp in Westerly, R.I., postponed the release of fourth-quarter financial results. Washington Trust will reports its quarterly numbers Wednesday afternoon, while New York Community will release its results on Thursday morning.

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