Minneapolis, MN – As winter weather continues across parts of Minnesota, 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, proper precipitation measurements help meteorologists assess storm impacts, verify radar estimates, and improve forecast accuracy for communities across the state.
For snowfall, officials recommend measuring snow on a flat, open surface such as a snow board, deck railing, or an untreated piece of wood placed away from buildings and trees. Snow should be measured vertically with a ruler, ideally every six hours during ongoing snowfall. When snow continues over extended periods, multiple measurements can be averaged to determine an accurate total.
Residents are advised to avoid measuring snow on grassy or uneven surfaces, as well as areas affected by drifting. Measuring compacted or shoveled snow can result in inaccurate or misleading totals and should not be used.
When measuring rainfall, a standard rain gauge placed in an open area provides the most accurate readings. If a rain gauge is not available, officials say a straight-sided container may be used, as long as measurements are taken carefully and consistently.
During freezing rain events, forecasters may also track ice accretion, which refers to the thickness of ice buildup on exposed surfaces. Ice accumulation is typically measured on flat metal objects or small tree branches and reported in inches.
The National Weather Service notes that public reports are especially valuable in Minnesota, where prolonged cold, lake-enhanced snow, and fast-moving systems can cause significant variation in conditions across short distances. Residents may be asked to submit snowfall, rainfall, or ice measurements through official reporting systems during active weather.
Officials emphasize that safety should always come first and measurements should only be taken when conditions allow.
