At a Glance

Toby could break snowstorm records for this late in the season in parts of the Northeast Megalopolis.It could be a top-five heaviest spring snowstorm in New York City.Toby could also bethe heaviest and tied for the latest March snowstorm in Philadelphia.

Winter Storm Toby will become the to impact the East Coast and has the potential to beone of the heaviest snowstorms this late in the season along parts of the Interstate 95 corridor, including in New York City and Philadelphia.

(MORE:)

The calendar turned to spring with the vernal equinox , but Mother Nature is not ready to let go of winter's fury just yet. Snowstorms canhappen in late March and early- to mid-April in the Northeast Megalopolis.

In fact, in New York City, there have been 15snow events of 6inches or more on and after March 16, seven of which were in April.

The last time thathappened was March 19,1992, when 6.2 inches of snow piled up in Central Park. The most recent 6-inch-plussnow event in April occurred on April 6, 1982, when a 9.6-inch snowfall was measured.

The biggest spring snowstormoccurring after the equinoxin the Big Apple was 11.8 inches March 20-21,1958, according to records dating to 1869.

Biggest spring snowstorms in New York City since 1869.

(The Weather Channel TV Network)

Winter Storm Toby has a chance to enter the list of New York City's top-five heaviest spring snowstorms.

(FORECAST: )

It would not be the latest snowstorm, however. Atwo-day snowfall eventApril 13-14, 1875,dumped10 inches in Central Park. The majority of the snow, 8.7 inches, fell April 13.

(MORE:)

Farther south along Interstate 95, Toby could bethe heaviest and latest March snowstorm in Philadelphia, where snow records date to 1885.

The dumped a foot of snow in the City of Brotherly Love, making it the heaviest March snowstorm on record there.

Biggest March snowstorms in Philadelphia since 1885.

(The Weather Channel TV Network)

If Philly picks up more than a foot of snow from Winter Storm Toby, it would earn the top spot in the city's biggest March snowstorms and would also occurjust as late in the month as the 11.4-inch snowfall March 19-21, 1958.

(FORECAST: )

However, an even heavier snowstorm happened later in the season when 19 inches fell on April 3, 1915, followed by another 0.4 inches the next day. That holds the record for the latest-in-season snowstorm of at least 6 inchesin Philadelphia.

Brian Donegan is a meteorologist at weather.com. Follow him on,and .