1960-69: Data collection began in June of 1960 at the Headquarters on Duncan Avenue (the Grail, 119 Duncan Avenue Cornwall on Hudson). Precipitation samples were collected from an aluminum bucket gauge (collection bucket: 19.5 cm diameter, inner collection and sample measurement: 6.35 cm diameter, 1.27 cm height, 40.2 cm3volume) after each rain/snow event. The precipitation is measured in inches. Snow is melted in the collection bucket and recorded as rain would be. Snowfall is also recorded by depth on the ground in inches. The snow is measured with a meter stick in multiple areas. In August 1963, the rain gauge was moved to the current location at Continental Road Headquarters.
After each precipitation event rain is collected from an aluminum bucket gauge (collection bucket: 19.5 cm diameter). The water is poured into an inner cup (6.35 cm diameter, 1.27 cm height, 40.2 cm3volume) and depth is measured with a ruler. The precipitation is measured in inches. Snow is melted in the collection bucket in the same manner as the rain. Snowfall is also recorded by depth on the ground in inches. The snow is measured with a meter stick in multiple areas around the headquarters and forest.
Large precipitation events can overflow the bucket. In such cases, the amount of precipitation is lost.
Evaporation is also potential problem if the sample is not measured soon after the rain event. However, the funnel on top keeps evaporation to a minimum.
Missing Data
Data was lost on August 28-27, 1971. Tropical Storm Doria overflowed the bucket with over 10 1/2 inches in less than 24 hours.