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Isolated lake effect Saturday night, with a clipper system arriving by tomorrow night

Outside of minor lake effect snow, a relatively cold and quiet night is expected across northern Michigan. Temperatures overnight will range from the negative single digits (confined to the E. Upper) to the lower 10s. With the cold air locked in, lake effect snow will continue in isolated spots - generally in the NW Lower and E. Upper. While coverage is limited, areas that experience continuous lake effect will see some accumulation. Farther from the big lakes, skies on the order of partly to mostly cloudy is the story line tonight. With high pressure shifting eastward of the Ohio Valley overnight and low pressure approaching the upper Midwest, winds will shift from the northwest to the southwest.

As winds shift to the southwest on Sunday, lake effect snow will be generally confined to areas west of I-75 in the E. Upper. Once again, accumulations and impacts are expected to remain minimal. Clouds will be more numerous west of I-75 in the N. Lower, with more sunshine east of I-75. Temperatures climb slightly tomorrow, ranging from the upper 10s to lower 20s.

Towards Sunday night and into Monday, a clipper system approaches the Great Lakes, bringing widespread snow to the area. A general light 1-3" of accumulation from the clipper system is anticipated in this time frame, but lake enhancement bands will give isolated spots extra amounts. With winds shifting towards the E-SE by Monday afternoon, places in the NE Lower (and more specifically, the L. Huron shoreline) have the best chance to see lake enhancement boost snow totals. Temperatures on Monday will once again top out in the upper 10s to lower-middle 20s.

Spotty lake effect continues into Tuesday, but broad high pressure over the eastern half of the United States builds on Wednesday. This will end the lake effect, and help moderate temperatures throughout the rest of the week. It appears that many places approach or rise above freezing (32°) by Friday.

-Meteorologist Blake Hansen

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