31. Moisture levels in Arctic air are extremely low, given very low rates of evaporation. 32. When the current is strong, arctic air tends to remain bottled up far north. 33. The Northwest is normally protected from arctic air by the Rockies to the east. 34. It can also be defined as the southern boundary of the Arctic air mass. 35. Then Arctic air blasted New England, not one but two weekends in a row. 36. In the Northeast, another surge of arctic air will be accompanied by gusty winds. 37. Arctic air will surge mainly eastward from the upper Plains.38. A new surge of arctic air will sweep into the Upper Midwest on Monday. 39. Frigid arctic air masses are shallow pools of dense air that have great weight. 40. The entire Northeast shivered as a mound of arctic air plunged directly south from Quebec.
