Willy from Philly measures snow precipitation Did you know that forecasters rely on YOU to help accurately predict storms, floods, droughts and extreme weather conditions? The National Weather Service, for example, depends on people just like you to report local rain and snow precipitation measurements to a citizen science project known as CoCoRaHS: Community Collaborative Rain, Hail, and Snow Network. Learn more about this long-running, popular project and, when you're ready to jump in, set up your rain gauge before the next rain or snow storm to collect rain, record measurements, and share data! CoCoRaHS shares the data with scientists, planners, and, yes, the National Weather Service. CoCoRaHS is also a SciStarter Affiliate which means you can earn credit for participation in your SciStarter dashboard. OOOOOOH! This is one is cool. Simply by Tweeting the precise snow accumulation data where you are, you can help cryosphere researchers calibrate the accuracy of instruments on-board weather satellites orbiting overhead! Those instruments are great at taking pictures and analyzing wide sections of land but they cannot tell the difference between, say, a snow bank and a huge accumulation of naturally falling snow. But you can! Get your ruler, put your warm winter gear on, and head outside to do SnowTweets! Tag @SciStarter and #SnowDay if you decide to do this one and we'll give you a shout out! Here are more projects on SciStarter that you can do in the snow!