1.   Also, on calm nights in rolling terrain, the cold, dense air drains toward the low spots keeping nearby ridge tops warmer.

2.   Both places are shallow, barren, high-altitude valleys where cold dense air drains on clear, calm nights.

3.   Also, on calm nights in rolling terrain, cold, dense air drains toward the low spots, keeping the hilltops warmer.

4.   Cold air will drain into the Northeast from a high pressure system in eastern Canada, providing an unseasonable, low-level chill.

5.   Colder air will drain south into Texas.

6.   In the case of northern New England, Arctic air drained westward through the St. Lawrence River Valley.

7.   Moreover, cold air drained down from mountains, setting the stage for a convincing imitation chill.

8.   Nearby small hills can stay free of frost as subfreezing air drains to lower ground.

9.   Nocturnal chill is enhanced in deep valleys, where heavy, cold air drains gently down mountains.

10.   Sometimes, cold air drains down the sides of mountains to the valley floor, helping to enhance the phony Arctic chill.