Winter Storms risk in New York

How winter storms behave in New York

New York sits in a position that exposes it to several different kinds of winter weather, and the type a homeowner faces depends largely on where the house is. Lake-effect snow forms when cold, dry air crosses Lakes Erie and Ontario, picks up moisture and heat, and then releases it in narrow bands over the land downwind. Communities east and southeast of the lakes — including the Tug Hill Plateau, the Buffalo area and the Watertown region — are among the snowiest places in the eastern United States. Totals can vary enormously over just a few miles, with one town buried and the next nearly dry.

Nor'easters are the other major driver. These coastal storms move up the Atlantic seaboard and can bring heavy snow, sleet, rain, strong winds and coastal flooding to Long Island, New York City, the lower Hudson Valley and, in some cases, far inland. Wind-driven snow cuts visibility, topples trees and power lines, and combines with high tides to push water onto shorefront property.

Ice storms are common in the interior valleys — the mid-Hudson and Mohawk valleys, parts of western New York, and areas near the Adirondack and Catskill ranges. Even a modest accumulation of freezing rain can coat trees and power lines and cause outages lasting for days.

Elevation matters too. The Adirondacks, Catskills and Tug Hill hold a deep snowpack and stay colder longer than the surrounding lowlands. Across most of the state, winter storm season runs roughly from late October through April, with the highest frequency from December through March; lake-effect events often begin in November and can persist into early spring. A mild winter in New York City can be a brutal one in Lewis County.

How it affects homes

Winter storm damage to New York homes usually falls into a handful of categories:

• Roof and attic damage. Accumulated snow is heavy, and repeated storms add up. Ice dams — created when attic heat melts snow that refreezes at the roof edge — trap water that backs up under shingles and stains ceilings and walls.
• Frozen and burst pipes. Pipes in exterior walls, crawlspaces, garages and unheated basements are most vulnerable, and a burst pipe can release hundreds of gallons before it is discovered.
• Falling trees and limbs. Ice-coated or saturated trees drop onto roofs, siding and vehicles, and bring down utility lines.
• Power outages and snowmelt. When heat and sump pumps stop, basements can flood as snow melts; outages also spoil food and can force families out of the home.
• Coastal flooding and erosion. Nor'easters can push water into shorefront homes and undermine beaches and bluffs along Long Island and the lower Hudson.

On insurance, most standard homeowners policies in New York cover wind damage and damage caused by the weight of ice and snow, including fallen trees, subject to your deductible. Many also cover sudden damage from a burst pipe, but generally expect the home to be heated and maintained — check your policy's language on freezing. Flood damage, including coastal storm surge and snowmelt flooding, is not covered by a standard homeowners policy; that requires a separate flood policy, such as one through FEMA's National Flood Insurance Program. Coastal New York policies may also carry separate windstorm or named-storm deductibles. Document damage with photos before cleanup, keep receipts for emergency repairs and hotel stays, and file claims promptly.

How to prepare your home

1. Protect your pipes. Insulate pipes in unheated spaces, seal drafts near plumbing, keep indoor temperatures at 55°F or above even when away, and let faucets drip during severe cold. Know where your main water shutoff is.
2. Fight ice dams before they form. Add attic insulation and ventilation, seal air leaks that let warm air into the attic, clean gutters in the fall, and use a roof rake from the ground to clear the first few feet of snow. Never climb onto a snow-covered roof.
3. Manage snow load. Hire a professional if snow gets deep, and watch for warning signs such as a sagging roofline, cracked ceilings or doors that suddenly stick.
4. Trim trees and check the roof. Remove dead limbs overhanging the house and repair loose shingles or flashing before winter.
5. Prepare for outages. Keep flashlights, batteries, a NOAA weather radio, blankets and at least a 72-hour supply of food and water, as recommended by Ready.gov. Run generators outdoors only — never in a garage, basement or near windows — and install battery-powered carbon monoxide alarms.
6. Winterize the exterior. Caulk and weatherstrip, drain and cover outdoor faucets, service the heating system and chimney, and keep furnace, dryer and generator vents clear of snow.
7. Keep paths safe. Stock sand or ice melt and clear steps and walkways to help prevent falls.
8. Check on neighbors, especially older adults and anyone living alone.

Frequently asked questions

When is winter storm season in New York?

Winter storms are possible from late October through April, but the peak period across most of New York is December through March. Lake-effect snow can begin in November and continue into early spring, and nor'easters have struck the coast in both early and late winter.

Where does lake-effect snow hit New York hardest?

The heaviest lake-effect snow falls in bands downwind of Lakes Erie and Ontario — the Tug Hill Plateau east of Lake Ontario, the Buffalo area and the Watertown region — though any community near the lakes can be affected depending on wind direction. The National Weather Service publishes forecasts and safety guidance for these events.

Does homeowners insurance cover winter storm damage in New York?

Policies typically cover wind damage and damage from the weight of ice and snow, including fallen trees, minus your deductible, and often burst-pipe damage if the home was reasonably heated. Flooding from storm surge or snowmelt is excluded and requires separate flood insurance. Review your policy or ask your agent before winter begins.

Official resources

• New York State Division of Homeland Security and Emergency Services — state preparedness guidance, alerts and winter storm information.
• National Weather Service — Winter Weather Safety — forecasts, warnings and cold-weather safety tips.
• Ready.gov — Winter Weather — how to prepare your home, kit and family before a storm.
• CDC — Winter Weather — health and safety guidance for cold, snow and ice.