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    Here are the best- and worst-case scenarios for the storm

    Fitchburg, MA: 3/7/2018: A motorist cleans snow off of their car in the parking lot of the Central Plaza near downtown Fitchburg as the storm intensifies. Another winter storm is predicted to hit the area this afternoon and tonight. (Jim Davis/Globe Staff)
    Jim Davis/Globe Staff

    There’s another nor’easter predicted to hit the Boston area on Tuesday, and this one is packing a snowy punch.

    The National Weather service has issued winter storm warnings for all of the Southern New England that take effect at 11 p.m. Monday lasting into Tuesday at 8 p.m. It’s expecting blizzard conditions at times.

    There’s no doubt about it: we’re about to see some snow. But how bad will it be? Here are the best and worst case scenarios for the Boston area, updated as of Tuesday morning.

    The expected amount

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    Forecasters at the National Weather Service say that between 12 and 18 inches of snow are likely to fall in the Boston area, while the South Shore and parts of the Cape could see between 18 to 24 inches when all is said and done.

    The best case scenario

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    Even the low-end forecast shows that Boston should see around 11 inches of snow. However, there is a nine in 10 chance that there will be an even higher snowfall, according to forecasters.

    The worst case scenario

    Hold on to your hat: Nearly 20 inches of snow is forecast for the Boston area under the worst-case scenario for this storm. Under this forecast, the South Shore would top out at about 22 inches.

    But don’t panic just yet. The chance of this forecast happening in Eastern Mass. is just one in ten.