Lake effect snow watch
A lake effect snow watch was a bulletin issued by the National Weather Service in the United States to warn of heavy snowfall amounts that will be possible from convective snow generated by cold air masses passing over unfrozen lakes (lake effect snow). The criteria for amounts may vary over different county warning areas. On October 2, 2017, issuance of the Lake Effect Snow Watch has been discontinued, and a winter storm watch is now issued when the above criteria are expected to be met.