Will New York City finally have a snow day? Maybe Sunday.

A major winter storm will undoubtedly drop snow in the Northeast Saturday through Sunday. But where and how much was still unclear on Wednesday morning.

Major cities like New York and Philadelphia have set records for the time without an inch of snow in a single day (almost two years for both locations). Both cities have a chance to end the streak on Sunday, but it all depends on how the storm progresses.

The storm already brought rain to the West Coast on Wednesday, but its exact path through the United States will not be known for a few days. Subtle differences in the precise path required will have huge implications for precipitation type, especially for the corridor from Washington, D.C., to New York City, according to a statement from forecasters with the weather forecast center.

Here’s what you need to know.

• The storm will bring widespread rainfall to the Southeast on Saturday and will most likely impact the Northeast Saturday through Sunday.

• Forecasters warn that there is at least some possibility that moderate to heavy amounts of snow will accumulate in major cities in the Northeast. Still, there’s a pretty good chance those cities will get little accumulation and more rain.

• For now, the heaviest snow is expected in parts of the Central Appalachians and the inland Mid-Atlantic.

Why the hesitation in the forecast, and when will meteorologists know more?

Computer weather models continue to show different possible outcomes in the storm’s track and intensity, causing forecasters to hesitate to predict the storm’s outcome.

The main supercomputer weather models are run four times a day, and each time forecasters compare them with the previous results and look for subtle differences or trends. They have noticed significant fluctuations in the center of the storm system, and this reduces their confidence in the forecast.

As of Wednesday morning, one of the models showed a slight trend toward a weaker storm. This is something forecasters will be paying close attention to as it could indicate less rainfall across the region.

As the storm system moves east of the Rocky Mountains Thursday through Friday, meteorologists hope to get a clearer picture of where exactly the storm will track southeast and eventually the coast this weekend.

Regardless of the exact track, the storm will most likely cause coastal flooding and bring strong, gusty winds.

This is only the first of two storms.

While this weekend’s storm will receive most of the attention in the coming days, an even stronger storm will most likely hit the East Coast next Tuesday. The prediction models were very consistent regarding the power and heat of the next system.

This means that any snow that falls on Sunday could be washed away by heavy rain on Wednesday, increasing the risk of flooding. The second storm is also expected to have even stronger and more widespread wind gusts than this weekend’s.