Weather
Delaware Winter Weather 2026/27: 10 Snow Disaster Prep Steps
Wilmington, DE – A powerful December winter storm could leave Delaware residents facing snow covered roads, frozen plumbing, coastal flooding and prolonged power outages. With winter 2026/27 approachi
By Marcus Hale · 2026-11-15T17:23:00.967Z
Wilmington, DE – A powerful December winter storm could leave Delaware residents facing snow covered roads, frozen plumbing, coastal flooding and prolonged power outages. With winter 2026/27 approaching, homeowners across Wilmington, New Castle County, the greater Philadelphia metropolitan area and communities throughout Delaware should prepare before heavy snow, freezing rain and damaging winds create dangerous conditions.
According to the National Weather Service and Delaware Emergency Management Agency, winter storms can produce hazardous snowfall, ice accumulation, strong winds and dangerous travel conditions. Northern Delaware generally faces greater snow potential, while Kent and Sussex counties can experience a dangerous combination of snow, freezing rain, coastal flooding and powerful nor'easters.
Here are 10 critical steps Delaware residents should take before a December blizzard or major winter storm threatens their homes.
1. Inspect Your Roof Before Heavy Snow Causes Damage Delaware's winter storms can produce heavy, wet snow that places considerable weight on roofs, particularly when freezing rain follows accumulating snowfall.
Inspect shingles, flashing, gutters and attic spaces for damage.
Homeowners in Wilmington, Newark, Middletown and Dover should pay particular attention to aging roofs, flat roofed structures and drainage systems.
Check for loose shingles, water stains and areas where snow may accumulate unevenly.
Watch for sagging ceilings or unusual structural noises. Never climb onto an icy roof to remove snow.
2. Protect Water Pipes Before Freezing Temperatures Arrive Although Delaware winters are generally milder than those farther north, prolonged freezing temperatures can still cause pipes to burst.
Insulate exposed plumbing in basements, crawl spaces, garages and exterior walls.
Disconnect outdoor hoses, protect exterior faucets and locate the home's main water shutoff valve.
Residents with vacation properties along the Delaware beaches should maintain appropriate indoor temperatures even when homes are unoccupied.
Open cabinet doors beneath vulnerable sinks during extreme cold to improve warm air circulation.
3. Service Your Furnace, Boiler or Heat Pump Before December A heating failure during a major winter storm can quickly become a household emergency.
Schedule professional inspections of natural gas furnaces, propane systems, boilers and electric heat pumps.
Replace appropriate filters, check heating fuel supplies and verify that thermostats operate correctly.
Heat pumps are common in Delaware homes. Keep outdoor units clear of obstructing snow and ice while following manufacturer instructions.
Never use kitchen ovens or outdoor cooking equipment for indoor heating.
4. Prepare for Power Outages That Could Last Several Days Heavy, wet snow, freezing rain and strong coastal winds can bring down trees and electrical lines.
Wooded neighborhoods in New Castle County and rural communities across Kent and Sussex counties may experience extended outages after damaging storms.
Keep flashlights, batteries, charged power banks and emergency radios accessible.
Households relying on electrically powered medical equipment should establish backup arrangements.
Operate portable generators outdoors, at least 20 feet from windows, doors and vents, with exhaust directed away from buildings.
Never operate generators inside garages, even with doors open.
5. Build a Winter Storm Emergency Supply Kit Maintain at least three days of emergency supplies, with additional provisions for households that could become isolated.
Store one gallon of drinking water per person daily, nonperishable food, prescription medications, blankets, first aid equipment and pet supplies.
Residents in rural Sussex County should consider keeping additional supplies if fallen trees or icy roads restrict travel.
Homes relying on electrically powered private wells should store extra water.
Keep essential supplies in an easily accessible location.
6. Prevent Ice Dams and Expensive Water Damage Ice dams can develop when melting roof snow refreezes near colder roof edges, potentially forcing water beneath roofing materials.
Inspect attic insulation, seal accessible air leaks and maintain appropriate ventilation.
Replace damaged weatherstripping around doors and windows.
Clean gutters and check downspouts before freezing weather arrives.
Homes experiencing recurring ice dams should receive professional evaluations.
Avoid attempting roof repairs during icy conditions.
7. Protect Coastal Homes From Nor'easter Flooding Delaware's coastline creates winter hazards beyond snowfall.
Powerful nor'easters can produce coastal flooding, beach erosion, damaging waves and strong winds, particularly when elevated water levels coincide with high tide.
Residents in Lewes, Rehoboth Beach, Dewey Beach, Bethany Beach and Fenwick Island should review their property's flood exposure.
Communities along Delaware Bay, including Bowers Beach and Slaughter Beach, should also prepare for tidal flooding.
Secure outdoor furniture, inspect drainage systems and move valuables above known flood levels.
Review evacuation routes and follow local emergency management instructions.
8. Prepare Snow Removal Equipment and Emergency Access Even moderate snowfall can create significant travel disruptions in Delaware, particularly when temperatures fluctuate around freezing.
Inspect snowblowers, shovels and ice melting supplies before December.
Check equipment condition and store fuel safely.
Residents in Wilmington, Newark and Dover should review municipal snow emergency parking restrictions and sidewalk clearing requirements.
Keep driveways, exterior stairways, emergency exits and heating appliance vents accessible.
Avoid overexertion while shoveling, especially if you have cardiovascular risk factors.
9. Test Carbon Monoxide Detectors Before Using Backup Heat Carbon monoxide poisoning becomes a serious concern when heating systems malfunction or generators are used improperly.
Test smoke and carbon monoxide alarms and replace batteries or devices according to manufacturer instructions.
Keep generator exhaust away from buildings and ensure heating appliance vents remain unobstructed.
Never use charcoal grills, camping stoves, gasoline powered equipment or kitchen ovens to heat indoor spaces.
Anyone experiencing symptoms of possible carbon monoxide exposure should immediately move to fresh air and call 911.
10. Establish a Family Blizzard Emergency Plan Identify where household members can safely shelter if electricity or heating becomes unavailable.
Keep emergency contacts written down and identify nearby warming centers when local officials announce their availability.
Check on older neighbors, residents with disabilities and people living alone.
Monitor National Weather Service forecasts, Delaware Emergency Management Agency announcements and DelDOT travel updates.
Avoid unnecessary travel during winter storm warnings, particularly along Interstate 95, Interstate 495, Route 1 and U.S. Route 13.
Drivers should also monitor the Delaware Memorial Bridge and other exposed crossings, where strong winds and icy conditions can create additional hazards.
Why December Preparation Matters for Delaware Winter 2026/27 Winter weather risks vary considerably across Delaware.
Wilmington, Newark, Middletown and northern New Castle County can experience accumulating snow, freezing rain and widespread commuter disruptions.
Dover, Smyrna and central Delaware face hazardous road conditions when snow changes to sleet or freezing rain.
Sussex County communities, including Georgetown, Milford and Seaford, may experience a mixture of winter precipitation, while coastal areas face additional threats from nor'easters, high winds and tidal flooding.
Unlike states farther north, Delaware can experience rapid changes between rain, snow and ice during the same winter storm. These transitions can make road conditions especially unpredictable.
Although this preparedness guide does not predict a specific December blizzard, significant winter storms remain a recurring seasonal hazard.
Waiting until a winter storm warning is issued can leave households scrambling for emergency supplies, heating equipment, backup power and snow removal materials.
For Delaware residents, completing these 10 preparations before December storms develop could mean the difference between safely weathering severe winter conditions and facing frozen plumbing, heating failures, coastal flooding, expensive property damage or dangerous emergency travel.