February 2013 nor'easter (Winter Storm Nemo)

Meteorological development and characteristics

The storm formed as two lows approached the East Coast and subsequently combined, causing rapid deepening of the pressure center and a tight gradient of winds. Forecasters described the system as producing hurricane-strength gusts along some exposed coasts and blizzard conditions inland where heavy snow and strong winds reduced visibility. Unusual features of the event included frequent lightning in convective bands of snow and several hours of very heavy snowfall rates. A technical discussion of the formation is available at meteorological analysis.

Geographic extent and snowfall

The main corridor of impact stretched from Virginia through New England, with the most intense snowfall falling across Connecticut, Massachusetts and parts of Rhode Island and southern Maine. Boston recorded nearly 25 inches of snow, and New York City saw close to a foot of accumulation. Some locations in Connecticut reported the heaviest totals; for example, Hamden measured almost 40 inches while many nearby towns reported at least a foot of snow. Regional reports and maps can be consulted via regional reports and Canadian impacts.

Impacts and responses

Impacts included widespread power outages, disrupted transportation, and emergency declarations. Approximately 700,000 electrical customers lost power across the affected region. Airports, schools and state offices were closed in many areas, and governors issued advisories or states of emergency to facilitate snow removal and emergency services. Detailed impact summaries are available at state reports, local summaries and utility outage logs.

Consequences and notable aspects

Beyond high snow totals, the storm produced coastal flooding, beach erosion in exposed areas, and dangerous travel conditions that lasted several days as crews worked to clear roads and restore power. The Weather Channel's decision to name the event "Nemo" sparked discussion about storm naming for winter systems; background on that debate is at naming controversy. Meteorologists also noted the occurrence of lightning in heavy snow bands; more on thundersnow can be found at thundersnow explanation.

• Major cities affected: Boston, New York City and many Connecticut towns (city impacts).
• Peak snowfall: localized extremes included nearly 40 inches in parts of Connecticut (recorded totals).
• Power and infrastructure: widespread outages and travel restrictions (infrastructure impacts).
• Emergency actions: state responses and recovery efforts (state coordination).
• Further reading and archived advisories: official bulletins and summaries (official archives).

In retrospective assessments, the February 2013 nor'easter is remembered for its combination of heavy, locally extreme snowfall, intense winds and the presence of thundersnow, which together produced significant short-term disruption but also yielded important lessons in forecasting, preparedness and response for winter coastal storms in the northeastern United States.