11.   A period of heavier snow is expected in the northern highlands of Arizona.

12.   A second disturbance over western Kansas will produce heavier snow in parts of central Colorado with snow showers farther south.

13.   Clouds will linger over the interior Northeast with a few heavier snow showers downwind of the Great Lakes.

14.   Farther north, heavier snow will mix with ice on Saturday night while coastal areas of southern New England have a change to rain.

15.   First, a warmer atmosphere holds more moisture, which means that heavier snows fall.

16.   Flurries and a few heavier snow showers will accompany a cold front crossing the Great Lakes, while sunshine and southwesterly winds bring milder air to the Northeast Seaboard.

17.   Heavier snow can occur near the Great Lakes and the Northeast coast, where additional moisture can be gleaned.

18.   Heavier snow will develop in northern New England on Friday night.

19.   Heavier snow will occur near the southern shores of the northern Great Lakes as the cold air gathers additional moisture in passing across the water.

20.   Heavier snows may fall in the mountains, where the sloping terrain provides additional lift.