Snow Across the Great Lakes, Central Appalachians, and Northeast; Unsettled Weather in the West

Light to moderate snow will continue into Saturday over the Great Lakes, Central Appalachians, and Northeast. This weekend into next week, a series of atmospheric rivers will bring gusty winds, periods of heavy rain, and mountain snow to northern California and the Pacific Northwest. Colder temperatures are in store for the weekend from the Great Lakes to East Coast. Read More >

Overview

This strong fall storm system produced storm-force gusts (defined as greater than 47 kt, or 54 mph) on Lake Superior as well as lakeshore flooding along the Bay of Green Bay shoreline. The water level on the Lakes Michigan-Huron system was already at nearly a record high from about a year of anomalously high precipitation. Combined with the prolonged east wind with this storm pushing water to the west, lakeshore flooding affected nearly all of the Bay of Green Bay.

Loop of radar images and Mean Sea Level Pressure analysis for the storm

Environment
Flooding Photos

Environment


850 mb Height and Temperature at 20z (4 pm EDT) October 21	850 mb Height and Temperature at 00z (8 pm EDT) October 21	850 mb Height and Wind at 20z (4 pm EDT) October 21	850 mb Height and Wind at 00z (8 pm EDT) October 21

925 mb Height and Wind at 20z (4 pm EDT) October 21	925 mb Height and Wind at 00z (8 pm EDT) October 21	MRMS base reflectivity and RAP analysis mean sea level pressure at 20z (4 pm EDT) October 21 showing a 986 mb low near the Twin Cities	MRMS base reflectivity and RAP analysis mean sea level pressure at 00z (8 pm EDT) October 21 showing the low near the Twin Cities weakening slightly to 988 mb

Lakeshore Flooding Photos


Courtesy Taana Blom	Courtesy Taana Blom	Escanaba, courtesy Steve Fritz	Escanaba, courtesy Steve Fritz

Courtesy Marie Kakuk	Courtesy Marie Kakuk	Courtesy Marie Kakuk	Courtesy Jason Burgman

Gladstone Yacht Club, courtesy Scott Gordon	Gladstone Yacht Club, courtesy Scott Gordon	Gladstone Yacht Club, courtesy Scott Gordon	Courtesy Stephen Neal