National Weather Service

The polar vortex is a large area of cold air that circulates around the Arctic.

The National Weather Service states that after abundant rainfall, smaller additional amounts of precipitation can more easily trigger flooding and rockslide conditions.

Iguanas, as ectothermic reptiles, can become lethargic and effectively 'freeze'—sometimes falling from trees—when exposed to temperatures at or below about 40°F (4°C) because their physiological systems slow or shut down.

When cold air moves over the relatively warmer waters of the Great Lakes, the temperature contrast can generate lake-effect snow that produces enhanced snowfall downwind and farther inland from the lakes.

The National Weather Service reported 1.85 inches of rainfall at Central Park on 2025-10-30, breaking the previous daily rainfall record of 1.64 inches set in 1917.

The National Weather Service reported 2.09 inches of rainfall at LaGuardia Airport on 2025-10-30, exceeding the previous daily rainfall record of 1.18 inches set in 1955.

The National Weather Service issues coastal flood warnings and wind advisories to alert communities about imminent coastal flooding and hazardous winds.

The U.S. National Weather Service defines a nor'easter as a coastal storm that develops between the latitudes of Georgia and New Jersey within 100 miles east or west of the U.S. East Coast.