The interesting wrinkle is that the change in date of the latest final snow of the season does not follow a strictly east to west line across the country, even to the east of the Rockies, as it would if latitude were the only influence. Meanwhile, places farther south and closer to big bodies of water (like oceans) have experienced their latest date of snow fall on the earlier side – looking at you folks in the Southeast. The higher the latitude and the higher the terrain, the later in the year the snow ends. Meanwhile, the latest snow for areas in the southeastern United States has come in March or early April.Ī lot of this pattern can be attributed to features inherent in the geography of the United States. Rockies and Mountain West, even stretching into the desert Southwest. The dates of latest snowfall can reach into late June for regions along the U.S. The spatial patterns shown in this map are similar to those seen in another snow-themed interactive map we produced, which looked at the earliest date of first snow. A few have a shorter history, but are otherwise of good quality (e.g., little to no missing data). Most stations shown in the map have at least 20 years of data. This can be a hard task when it comes to snow data, (read more in this Beyond the Data blog). The data is from the Global Historical Climatology Network and has been subject to various quality controls to make sure that the data is both reasonable and complete. Scott Kuhn captured this image after a rare April snow in northern Georgia on April 16, 2018. You can zoom in and click on any dot to find what the latest date of snow has been in your neighborhood based on weather stations nearby. ) Purple colors reflect latest-snowfall dates that occurred later in the year, while bluer shades reflect earlier dates for the last snow of the year. weather stations during their period of operation (up through April 11 of this year. This interactive map shows the latest day for which measurable snow (accumulations of greater than 0.1 inches) was recorded for thousands of U.S. east in March, the recent storm got us thinking: What is the latest date that measurable snow has fallen in different parts of the United States? Following on the heels of four nor’easters that buried parts of the U.S. plains know all too well right about now. Snow doesn’t stop the moment that winter becomes spring on the calendar - a fact that those living in the northern U.S.