Rain for I-95 cities, wet snow for the mountains, high-tide flooding on the coast, and a first freeze in the Deep South as the storm trends faster and drier

Winter's first real push into the eastern United States arrives this week. Low pressure organizing over the Ohio Valley is forecast to move toward the Mid-Atlantic coast Thursday and strengthen into a nor'easter Friday, and the cold air pouring in behind it will give nearly 200 million people east of the Mississippi their coldest temperatures since spring, CNN meteorologists reported.

For most households along the Interstate 95 corridor from Philadelphia to Boston, the storm means a cold, windy rain rather than snow — an inconvenience for commuters, not a snow emergency. The first accumulating snow is expected on higher ground, from the Appalachians to upstate New York and northern New England, while lake-effect snow returns to the upper Great Lakes, including Michigan's Upper Peninsula, for the first time since spring.

The forecast has also shifted in a direction many commuters will welcome. The Weather Prediction Center now favors a slightly faster storm with less precipitation, which lowers the odds of snow at low elevations, according to a Wednesday forecast summary. Mountain snow remains a concern. Forecast details below reflect National Weather Service products issued Tuesday evening and Wednesday morning, Nov. 11, Eastern Time.

Mountain Snow, Valley Rain and a Faster Storm Track

Forecasters expect the low to take shape over the Ohio Valley on Wednesday, slide off the Mid-Atlantic coast and deepen on Friday, Nov. 13, then move northeast toward Atlantic Canada. Rain should spread across the Northeast on Thursday, become widespread Thursday evening and taper off by Saturday morning in New York City. Conditions should improve across most of the region by Sunday.

The Weather Prediction Center described "drastically colder air" surging into the eastern half of the country, with snow showers across the Great Lakes and a cold rain with potential inland snow in the central Appalachians of Pennsylvania, Maryland and West Virginia.

Farther north, the National Weather Service office in Albany, New York, gives the southern Adirondacks and southern Green Mountains a 60 to 70 percent chance of at least 2 inches of snow, mostly above 1,500 feet. "An early season accumulation of snow is likely across northern and high terrain areas," the office said, as reported by NTD. Valleys may see rain mixing with wet snow by Friday night, but the office said uncertainty remains large.

The faster track matters. The Weather Channel said the storm is now expected to pull away a little sooner than the earlier forecast, trimming rain and snow totals, and that overnight lows along the I-95 corridor should stay above freezing. That means no snow is expected in Philadelphia, New York City, or Boston. Models still disagree on one scenario: if a second low forms farther offshore, coastal gusts could strengthen briefly, while a track farther out to sea would mean less rain and wind overall.

Coastal High Tides on Long Island and Connecticut

Along the coast, the bigger hazard is water. In its Tuesday 7:05 p.m. EST forecast discussion, the National Weather Service in New York said minor coastal flooding is possible during daytime high tides on Thursday and Friday. The south shore back bays of western Long Island and the southwestern Connecticut shoreline sit closest to minor flood thresholds, and one model suggests moderate flooding is possible at Freeport.

No coastal flood advisories were in effect when that discussion was issued. Land gusts are forecast at 20 to 25 knots, or roughly 23 to 29 miles per hour, below advisory levels, while gale-force gusts are possible over ocean waters Friday into Saturday. The office said rain-driven flash flooding does not appear likely.

Residents of low-lying back-bay neighborhoods, drivers who use shoreline roads at high tide and boat owners face the most practical risk.

First Freeze Risk Stretches From Atlanta to Central Florida

The cold is the most certain part of the forecast — and the part that reaches the most people. Temperatures are expected to run 5 to 15 degrees below historical averages behind the storm, with frost potential reaching into the South, according to a Daily Voice summary of NWS forecasts. Northeast highs may hold in the 30s and 40s this weekend, with lows in the 20s.

Parts of the Deep South could drop below freezing Friday and Saturday nights. For Atlanta and Birmingham, Alabama, that is roughly on schedule, since a first freeze typically arrives in the first half of November. Orlando could dip into the 40s for the first time since March. The chill is short-lived, and much of the country is expected to return to above-average temperatures next week.

Preparing Homes, Pipes and Commutes Before Friday

Most households need only modest steps. Check your local NWS forecast and sign up for county alerts, since coastal flood advisories and freeze warnings can be added on short notice. Drivers heading into the Poconos, Catskills, Berkshires, Adirondacks or Green Mountains on Thursday night or Friday should plan for wet snow on elevated roads, even if valley towns see only rain.

In the South, Friday and Saturday nights are the time to bring in potted plants, cover tender landscaping, give outdoor pets shelter and protect exposed outdoor pipes. Test heating systems now rather than during the first cold night. Coastal residents should move vehicles from flood-prone lots before Thursday's and Friday's daytime high tides and never drive through water covering a road.

Stocking up for a major snowstorm in Philadelphia, New York, or Boston is not warranted based on current forecasts. Watch instead for wet snow on higher roads and water rising over shoreline streets at high tide. Follow instructions from local emergency officials if conditions change.

The Weather Prediction Center and local NWS offices will update forecasts several times daily through Saturday, and any coastal flood or freeze products will appear on county alert pages first. The bottom line: the cold is certain, coastal flooding should stay minor, and snow is now largely a mountain story.

What Readers Want to Know

When will the nor'easter arrive? Rain spreads across the Northeast on Thursday, Nov. 12, the storm strengthens offshore Friday, Nov. 13, and most precipitation ends by Saturday morning, Eastern Time.

Will New York City, Philadelphia, or Boston get snow? Current forecasts say no. Overnight lows along the I-95 corridor are expected to stay above freezing, so major cities should see rain.

Where is snow most likely? Higher elevations of the central Appalachians, upstate New York and northern New England, with the best odds above about 1,500 feet. Lake-effect snow is also expected in the upper Great Lakes.

Which coastal areas could flood? The NWS in New York flagged the south shore back bays of western Long Island and southwestern Connecticut for possible minor flooding during daytime high tides Thursday and Friday.

How cold will it get in the South? Parts of the Deep South, including the Atlanta and Birmingham areas, could fall below freezing Friday and Saturday nights, and Orlando could reach the 40s.

How long will the cold last? Only a few days. Above-average temperatures should return to much of the country next week.