Parked cars covered in snow

Winter Weather

Winter Weather consists of winter storm events in which the main types of precipitation are snow, sleet, or freezing rain.

In the National Risk Index, a Winter Weather Risk Index score and rating represent a community's relative risk for Winter Weather when compared to the rest of the United States. A Winter Weather Expected Annual Loss score and rating represent a community's relative level of expected building and population loss each year due to Winter Weather when compared to the rest of the United States.

A map of the United States colored by Winter Weather Risk Index ratings. Winter Weather risk is possible and prevalent across the United States with concentrated risk in the northern Midwest. For full results, see the National Risk Index Map webpage.

Winter Weather Exposure

A Winter Weather exposure value represents a community's building value (in dollars) and population (in both people and population equivalence) exposed to Winter Weather.

Winter Weather Annualized Frequency

A Winter Weather annualized frequency value represents the average number of recorded Winter Weather hazard occurrences (events) per year over the period of record (12.14 years).

Source Data

National Oceanic and Atmospheric Administration's National Weather Service Weather Alerts compiled and archived by Iowa State University's Iowa Environmental Mesonet

Winter Weather Historic Loss Ratio

A Winter Weather historic loss ratio is the representative percentage of the exposed consequence type value (building or population) expected to be lost due to a Winter Weather hazard occurrence.

Winter Weather Processing Methodology

For comprehensive details about the Winter Weather processing methodology, see the National Risk Index Technical Documentation.