Snowfall Statistics: Percentile Rankings

Annual (July–June) snowfall total in which 25 percent of the observations are below the given snowfall value, based on monthly totals from 1890–91 to the 1999–2000 seasons.

Annual (July–June) snowfall total in which 25 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons.

Seasonal (October–March) snowfall total in which 25 percent of the observations are below the given snowfall value, based on monthly totals from 1890–91 to the 1999–2000 seasons.

Seasonal (October–March) snowfall total in which 25 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons.

Snowfall total within the dates of the snow accumulation season in which 25 percent of the observations are below the given snowfall value, based on monthly totals from 1890–91 to the 1999–2000 seasons.

Snowfall total within the dates of the snow accumulation season in which 25 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons.

Annual (July-June) snowfall total in which 50 percent of the observations are below the given snowfall value, based on monthly totals from 1890–91 to the 1999–2000 seasons.

Annual (July–June) snowfall total in which 50 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons.

Seasonal (October–March) snowfall total in which 50 percent of the observations are below the given snowfall value, based on monthly totals from 1890–91 to the 1999–2000 seasons.

Seasonal (October–March) snowfall total in which 50 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons

Snowfall total within the dates of the snow accumulation season in which 50 percent of the observations are below the given snowfall value, based on monthly totals from 1890–91 to the 1999–2000 seasons.

Snowfall total within the dates of the snow accumulation season in which 50 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons.

Annual (July–June) snowfall total in which 75 percent of the observations are below the given snowfall value, based on monthly totals from 1890–91 to the 1999–2000 seasons.

Annual (July–June) snowfall total in which 75 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons.

Seasonal (October-March) snowfall total in which 75% of the observations are below the given snowfall value, based on monthly totals from 1890-91 to the 1999-2000 seasons.

Seasonal (October–March) snowfall total in which 75 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons.

Snowfall total within the dates of the snow accumulation season in which 75 percent of the observations are below the given snowfall value, based on monthly totals from 1890–91 to the 1999–2000 seasons.

Snowfall total within the dates of the snow accumulation season in which 75 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons.

Annual (July–June) snowfall total in which 99 percent of the observations are below the given snowfall value, based on monthly totals from 1890–91 to the 1999–2000 seasons.

Annual (July–June) snowfall total in which 99 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons.

Seasonal (October–March) snowfall total in which 99 percent of the observations are below the given snowfall value, based on monthly totals from 1890–91 to the 1999–2000 seasons.

Seasonal (October–March) snowfall total in which 99 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons.

Snowfall total within the dates of the snow accumulation season in which 99 percent of the observations are below the given snowfall value, based on monthly totals from 1890–91 to the 1999–2000 seasons.

Snowfall total within the dates of the snow accumulation season in which 99 percent of the observations are below the given snowfall value, based on monthly totals from 1971–72 to the 1999–2000 seasons.

For each annual snowfall year (July–June) and each seasonal snowfall year (October–March), one gridded map was generated based on the individual station observations using a kriging technique. From this, a software procedure extracted the 25th, 50th, 75th, and 99th percentile snowfall statistics for each gridpoint, based on the entire distribution for the given number of seasons. The units represent an annual snowfall total (inches) in which 25 percent, 50 percent, 75 percent, and 99 percent of the observation are below the given value.

Since exact dates, rather than months, delimit the snow accumulation season, the technique to generate these statistics incorporated whole month and partial-month snowfall totals. Whole month snowfall totals (Dec., Jan., Feb.) could be used for all stations, however a weighted fraction of the monthly snowfall was used when the onset and/or end date fell within a month. This fraction was based on the number of days in a particular month that was included in the snow accumulation season. Therefore, since the snow accumulation season is variable throughout the state, snowfall totals must be compiled from unequal time periods for each station.

For each season, one gridded map was generated based on the individual station observations using a kriging technique. From this, a software procedure extracted the 25th, 50th, 75th, and 99th percentile snowfall statistics for each gridpoint, based on the entire distribution for the given number of seasons. The units represent an annual snowfall total (inches) in which 25 percent, 50 percent, 75 percent, and 99 percent of the observation are below the given value.