Weather warning indicating heavy snowfall amounts generated by convective lake-effect snow
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A lake effect snow warning is a bulletin issued by the National Weather Service in the United States to warn of heavy snowfall accumulations that are imminent from convective snow generated by very cold airmass passing over unfrozen lakes (lake effect snow). The criteria for amounts may vary significantly over different county warning areas.[1] On October 2, 2017, some National Weather Service Forecast Offices discontinued issuing the Lake Effect Snow Warning, and consolidated it with the Winter Storm Warning.[2] On October 15, 2018, the National Weather Service discontinued issuing Lake Effect Snow Warnings nationwide all together, and all offices consolidated it with the Winter Storm Warning.[3] Lake effect snow warnings were reinstated for the 2019–20 winter season.[4]
Environment Canada's Meteorological Service of Canada issues similar warnings but they are called snowsquall warnings.
^National Weather Service. "Lake effect snow warning". Glossary - NOAA's National Weather Service. Retrieved 17 May 2011.
^Central Region Headquarters. "National Weather Service Hazard Simplification" (PDF). National Weather Service. Retrieved November 8, 2017.
^"National Weather Service Service Change Notice 17-77 Updated" (PDF). Retrieved February 1, 2019.
^"National Weather Service Service Change Notice 19-63 Updated" (PDF). Retrieved December 18, 2019.
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