Portland, ME – As winter weather continues across parts of Maine, officials are reminding residents that accurate snowfall and rainfall measurements play an important role in forecasting and public safety.
According to the National Weather Service, measuring precipitation correctly helps meteorologists assess storm impacts, improve forecasts, and share reliable information with emergency managers and utility crews.
For snowfall, officials recommend using a flat, open surface such as a snow board, deck railing, or piece of untreated wood placed away from buildings and trees. Snow should be measured vertically with a ruler, ideally every six hours during ongoing snowfall. Multiple measurements can then be averaged to determine an accurate total.
Residents are advised not to measure snow on grassy surfaces, which can cause uneven readings, or in areas where drifting occurs. Compacted or shoveled snow should also be avoided, as it does not reflect actual snowfall amounts.
When measuring rainfall, a standard rain gauge placed in an open area provides the most accurate results. If a gauge is not available, a straight-sided container can be used, as long as measurements are taken carefully and consistently.
During freezing rain events, officials often reference ice accretion — the thickness of ice buildup on exposed surfaces. This is typically measured on flat metal objects or small tree branches and reported in inches.
The National Weather Service notes that public reports help verify radar estimates and ground conditions, especially in areas where weather stations are spaced far apart. Residents can submit snowfall and rainfall totals through official reporting systems or local weather offices when requested.
Officials stress that safety should always come first and measurements should only be taken when conditions allow.
