Analysis of an extreme <scp>Caspian Sea</scp> lake‐effect snowfall: a case study of 9–11 <scp>February</scp> 2020

Lake-/sea-effect snow forms typically from late fall to winter when a cold air mass moves over the warmer, large water surface. The resulting intense snowfall has many societal impacts on communities living in downwind areas; hence, accurate forecasts of lake-/sea-effect snow are essential for safety and preparedness. Forecasting lake-/sea-effect snow is extremely challenging, but over the past decades the advancement of numerical forecast models and the expansion of observational networks have incrementally improved the forecasting capability. The recent advancement includes numerical forecast models with high spatiotemporal resolutions that allow simulating vigorous snowstorms at the kilometer-scale and the frequent inclusion of radar observations in the model. This combination of more accurate weather prediction models as well as ground-based and remotely sensed observations has aided operational forecasters to make better lake-/sea-effect snow forecasts. A remaining challenge is that many observations of precipitation, surface meteorology, evaporation, and heat supply from the water surface are still limited to being landbased and the information over the water, particularly offshore, remains a gap.This primer overviews the basic mechanisms for lake-/sea-effect snow formation, evolution of forecast techniques, and challenges to be addressed in the future.This article is categorized under: • Science of Water > Water Extremes • Science of Water > Water and Environmental Change • Science of Water > Methods K E Y W O R D S extreme weather, lake-effect snow, numerical model, sea-effect snow, weather forecast

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Forecasting lake‐/sea‐effect snowstorms, advancement, and challenges

Fujisaki‐Manome

Wright

Mann

et al. 2022

WIREs Water

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Analysis of an extreme Caspian Sea lake‐effect snowfall: a case study of 9–11 February 2020

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Forecasting lake‐/sea‐effect snowstorms, advancement, and challenges

Forecasting lake‐/sea‐effect snowstorms, advancement, and challenges

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