Blizzard warning Friday night into early Saturday; heavy snow, strong winds.

1. A low-pressure system will bring colder air into Minnesota and western Wisconsin on Friday evening.

2. The rain will change to heavy snow overnight Friday into early Saturday.

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3. Strong winds with gusts up to 40-50 mph will reduce visibilities.

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4. The transition from rain to snow in the Twin Cities metro area is expected by 9 p.m. on Friday.

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5. Snow totals will depend on the timing and duration of the heaviest snow.

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