Totals come from the NOAA National Snowfall Analysis, which blends radar precipitation estimates, model snow ratios, and thousands of ground reports on a 4 km grid. Each analysis day covers the 24 hours ending at 12Z (7 or 8 am Eastern), so a date range sums those days. Recent days are revised for about a week as late reports arrive.
Pick a recent window, a past season, or any range of dates back to October 2008. Hover for a total at the cursor, or click to pin a spot. Add ?window=7d or ?start=20260120&end=20260126 to the address to link to a view.