11.   Another dome of arctic air is sprawled across the Plains and Great Lakes states.

12.   Arctic air will gradually retreat from the northern Rockies and northern Plains as winds from the west develop.

13.   Arctic air will retreat into far northern Canada.

14.   Arctic air will spread into the northern Rockies and western Dakota as a cold front sweeps across these regions.

15.   Arctic air, accompanied by broken areas of snow, will penetrate into northern Minnesota and northeast North Dakota on Sunday.

16.   Arctic air will clash with warm, moist air from the Gulf of Mexico on Wednesday and Wednesday night, setting the stage for rain.

17.   Arctic air will continue its hiatus across the contiguous states Saturday as Pacific air streams eastward across the nation.

18.   Arctic air will loosen its grip on the northern Plains Friday as a warm ridge of high pressure builds eastward from the Rockies.

19.   Arctic air will slide south into the northern Plains.

20.   Arctic air will spill slowly south from the northern Rockies and Dakotas into the central Plains.