Spencer, IA (northwestiowanow.com) — Tonight, isolated snow showers are possible in the north, but the main story is the Arctic cold settling in this weekend through Tuesday. A strong low-pressure system is pushing cold air into the region, bringing gusty northwest winds and dropping temperatures. Winds could gust up to 45 mph this evening as temperatures fall.

Expect bitter cold starting this weekend, with lows dipping below zero Saturday through Monday nights. A long wave trough will bring more Arctic air, with the coldest night likely Monday, when northern areas could see lows in the teens below zero. Wind chills will reach advisory levels, especially in the north, with cold weather advisories in effect Sunday. 

By Tuesday, the cold air will begin to ease, with temperatures starting to rise as the weather pattern shifts.